Diamond Certified Companies are Rated Highest in Quality and Helpful Expertise.

  • Why this rating is the most accurate.
  • Our editors gather deep company info.
  • Performance is Guaranteed.

Diamond certified companies are top rated and guaranteed

Why Trust Diamond Certified HVAC Companies Rated Highest in Quality and Helpful Expertise®?

An HVAC contractor repairs a residential air conditioning unit.

You are the customer. If your goal is to choose an HVAC contractor that will deliver high customer satisfaction and quality, you’ll feel confident in choosing a Diamond Certified company. Each has been rated Highest in Quality and Helpful Expertise® in the most accurate ratings process anywhere. And you’re always backed by the Diamond Certified Performance Guarantee. Here’s why the Diamond Certified ratings and certification process will help you find a top rated HVAC company and is unparalleled in its accuracy, rigor, and usefulness:

1) Accuracy: All research is performed by live telephone interviews that verify only real customers are surveyed, so you’ll never be fooled by fake reviews.

2) Statistical Reliability: A large, random sample of past customers is surveyed on an ongoing basis, so the research results you see truly reflect a Diamond Certified company’s top rated status.

3) Full Disclosure: By clicking the name of a company above, you’ll see the exact rating results in charts and read verbatim survey responses as well as researched articles on each qualified company.

4) Guaranteed: Your purchase is backed up with mediation and the Diamond Certified Performance Guarantee, so you can choose with confidence.

Click on the name of a Diamond Certified company above to read ratings results, researched articles and verbatim customer survey responses to help you make an informed decision.

More than 200,000 customers of local companies have been interviewed in live telephone calls, and only companies that score Highest in Quality and Helpful Expertise®—a 90+ on a 100 scale—and pass all of the credential-based ratings earn Diamond Certified. By requiring such a high score to qualify, the Diamond Certified Resource eliminates mediocre and poorly performing companies. Read detailed information about the ratings and certification process.

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DIAMOND CERTIFIED EXPERT CONTRIBUTORS IN THE San Francisco – Air Conditioning, Heating & Ventilation (HVAC) CATEGORY

Raul Galvez is a veteran of the HVAC industry and owner of California Heating and Cooling, a Diamond Certified company. He can be reached at (415) 735-0927 or by email.

Raul Galvez

diamond certified contributor profile and expert article

Raul Galvez: Still Getting His Hands Dirty

By James Florence, Senior Writer

ANTIOCH — After nearly 40 years in the heating and cooling business, Raul Galvez spends a lot of time in the office, but he hasn’t lost the taste for field work. “I still enjoy getting my hands dirty,” he affirms. “If you stop practicing your trade, you start to lose your skills, so I make it a point to stay fresh and connected with HVAC work. It’s just a part of who I am, and I don’t want to lose that.”
Originally from Peru, Raul began his HVAC career by studying refrigeration as a young man. When he came to the United States, he was glad to find not only that his skills were relevant, but the conditions for performing the work were improved as well. “Doing HVAC in Peru was challenging,” he recounts. “For example, it was a lot harder to get parts—sometimes I just had to repair the old ones because I couldn’t get my hands on replacements. By comparison, working in the U.S. was great. Any time I needed a part, I could just go buy it.”
After working for a few different companies throughout the years, Raul decided it was time to strike out on his own and founded California Heating and Cooling in 2007. Today, he says he enjoys running his own business, not least because it allows him to focus more on customer service and education. “Most people don’t know anything about their HVAC systems, so I like educating customers about maintenance and how to maximize system performance. I’ve always liked helping people, so this is a great way to do that.”
A resident of Antioch (where he lives with his wife, Gladys), Raul expresses his appreciation for the unique character of the Bay Area. “I love it here. The weather is amazing, the people are great—it’s kind of its own thing. I’ve been to a lot of different parts of the United States and there’s no place quite like it.”
Outside of work, Raul spends most of his free time relaxing. “Now that our kids are grown up, Gladys and I get to do a little more relaxing,” he says. “When your kids are small, most of your time is dedicated to them, but our youngest daughter is about to turn 19, so we’re on the verge of an empty nest. We like going out to dinner on weekends and traveling. I go back to Peru at least once a year and we often go to Florida to visit Gladys’ parents.”
In regard to a career philosophy, Raul espouses the importance of professional pride. “The number one thing I teach my employees is to take pride in their work,” he explains. “When you take pride in your work, you’re going to do your best, which will increase the quality of the result. If you’re proud of your work, there’s a good chance the customer is going to be happy with it as well.”
When asked the first thing he’d do if he were to retire tomorrow, Raul says he probably wouldn’t. “I’m don’t really plan to retire because I don’t want to be sitting at home doing nothing. I like running my company, being with my guys and working in the field.” However, he admits there’s at least one item on his bucket list. “I’ve always wanted to go to Europe, rent a Ferrari and drive on an autobahn. There’s no point owning a Ferrari in California, where the maximum speed is 65 miles per hour, but to spend a few days driving on the autobahn where you can go as fast as you want…now that sounds like fun.”
Ask Me Anything!
Q: Are you an early bird or a night owl?
A: A night owl.

Q: Music or talk radio?
A: Music.

Q: What’s your favorite local restaurant?
A: Black Angus Steakhouse in Brentwood.

Q: What’s your favorite thing to do on a rainy day?
A: Stay home, relax and watch some TV.

Q: What’s your favorite TV show?
A: “How It’s Made” on the Science Channel. I like to learn new things and it’s fascinating to see how factories operate.

Read more

The Importance of HVAC Maintenance


ANTIOCH — When it comes to their cars, most people stay on top of maintenance, investing time and money toward changing engine oil, regulating tire pressure, and washing the exterior. Unfortunately, when it comes to their home heating and air… Read more

Expert Video Tip

Video: The Impact of HVAC Maintenance

Complete Video Transcription:

ANTIOCH — Host, Sarah Rutan: Most car owners are proactive about maintenance, but unfortunately, the same can’t be said of homeowners in regard to their HVAC systems.… Read more

Al Morando is vice president of Innovative Mechanical, Inc., a Diamond Certified company since 2004. He can be reached at (650) 583-8222 or email.

Al Morando

diamond certified contributor profile and expert article

Al Morando: Brotherly Ambition

By James Florence, Diamond Certified Resource Reporter

SOUTH SAN FRANCISCO — When asked how he became involved in the HVAC industry, Al Morando cites the influence of an older sibling. “My brother, Ken, started Innovative Mechanical in 1984,” he says. “About a decade later, I was taking a lot of marketing and communications classes in college, and Ken was looking to start a new marketing program with his business that would target the residential demographic. Because of my interest in marketing, he brought me on to help run the program, and I’ve been here ever since.”

Today, as vice president of Innovative Mechanical, Al says his favorite part of his job is interacting with customers. “I like the fact that I get to meet new people every day. I also enjoy the process of finding out what a customer’s needs are and directing them toward solutions that will satisfy those needs.”

A longtime resident of Millbrae (where he lives with his wife, Eleonora, and son, Giovanni), Al appreciates living and working close to home. “I come from a pretty big family, and most of them are here in the Bay Area,” he says. “We get together fairly often for holidays and birthdays. On the 4th of July, we have a barbeque with about 50 people in attendance, so that’s always fun.” When he’s not spending time with family, Al enjoys activities like playing golf and attending local professional sporting events.

In his life and career, Al espouses the importance of treating others with respect. “If a professional comes into my home, I would hope they’d treat me respectfully and look out for my best interests,” he says. “At Innovative Mechanical, that’s exactly the approach we take to serving our customers.”

When asked what his future retirement might look like, Al says he’d continue to stay connected with the family business. “Even after I retire, I’ll probably still come in and help out every once in a while, just to keep myself busy. Of course, I’ll also relax a little more and play a lot more golf.”

Ask Me Anything!

Q: Coffee or tea?
A: Green tea.

Q: What’s your favorite season?
A: Summer—the weather is nice, so there are lots of opportunities to get outside and do things with my family.

Q: What country would you most like to visit?
A: Italy. I have family over there, and I enjoy visiting and reconnecting with my relatives.

Q: What’s your favorite local restaurant?
A: Ristorante Rocca in Burlingame.

Q: What’s your favorite movie genre?
A: I like sports movies like Rocky and Hoosiers.

Read more

Differentiating Furnace Filter Efficiencies


SOUTH SAN FRANCISCO — Many consumers assume all furnace filters are basically the same, but there’s actually a wide variety of grades and styles to choose from. One of the major ways in which filters differ is in regard to… Read more

Expert Video Tip

Video: Filters and Efficiencies

Complete Video Transcription:

SOUTH SAN FRANCISCO — Host, Sarah Rutan:  When it comes to improving the energy efficiency in your home, one importance aspect is furnace filter efficiency.… Read more




  • Carrier

  • Rheem

  • Trane

  • Lennox

  • Mitsubishi

  • Amana

  • Bryant

  • Ares

  • First Air

  • Goodman

Amana HVAC Systems
American Standard
Arcoaire HVAC Systems
Armstrong Heating & Cooling Systems
Bryant HVAC Systems
Intertherm HVAC Systems
Haier Cooling & Heating Systems
Trane HVAC Equipment
York HVAC Systems
Samsung HVAC Equipment
Emerson Heating & Cooling Systems
Evcon HVAC Systems
Frigidaire HVAC Equipment
General Electric
Goodman HVAC Systems
Carrier Heating & Cooling
Hallmark Heating & Cooling Systems
Heil Heating & Cooling Systems
Sanyo Heating & Cooling Systems
Janitrol Heating & Cooling Systems
Kenmore HVAC Systems
Lennox Cooling & Heating Systems
Mitsubishi HVAC
Buderis HVAC Systems
Burnham Heating & Cooling Systems
Comfortmaker HVAC Systems
Coleman HVAC Systems

home heating & cooling service
heating and cooling system repair
HVAC repair
cooling & heating installation
air conditioning service
heating repair
HVAC unit replacement
residential HVAC service
commercial HVAC service
emergency HVAC service
HVAC troubleshooting
HVAC heat pump repair
new furnace installation
HVAC system service
HVAC sales & installation
HVAC duct cleaning
air conditioner installation
HVAC blower service
HVAC ductwork installation
HVAC work
HVAC system design
natural ventilation unit installation & service
HVAC ductwork repair
ventilation system service
ventilation duct cleaning
ventilation filter installation
HVAC efficiency testing

Barbary Coast
Bayview District
Bernal Heights
the Castro
Cole Valley
Cow Hollow
Diamond Heights
Duboce Triangle
Eureka Valley
Financial District
Fisherman’s Wharf
Fort Mason
Glen Park
Golden Gate Park
the Haight
Hayes Valley
Hunters Point
Inner Richmond
Inner Sunset
Jackson Square
Laurel Heights
Marina District
Mission District
Nob Hill
Noe Valley
North Beach
Outer Richmond
Outer Sunset
Pacific Heights
Potrero Flats
Potrero Hill
Rincon Hill
Russian Hill
San Francisco
Sea Cliff
South of Market Street (SOMA)
Sunset District
Telegraph Hill
the Tenderloin
the Presidio
Treasure Island
Twin Peaks
Union Square
West Portal
Western Addition


American Backflow Prevention Association (ABPA) (www.abpa.org/)
Air Conditioning Contractors of America (ACCA) (www.acca.org/)
Associated General Contractors of America (AGC of America) (www.agc.org/)
Associated Specialty Contractors (ASC) (www.assoc-spec-con.org/)
American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) (www.ashrae.org/)
California Sheet Metal and Air Conditioning Contractors National Association (CALSMACNA)
(www.cal-smacna.org/)Contractors State License Board (CSLB) (www.cslb.ca.gov/)
Mechanical Contractors Association of America (MCAA) (www.mcaa.org/)
National Board of Boiler and Pressure Vessel Inspectors (NBBPVI) (www.nationalboard.org/)
North Coast Builders Exchange (NCBE) (www.ncbeonline.com/)
Heating, Cooling Contractors Association (PHCCA) (www.phccweb.org/)
Refrigeration Service Engineers Society (RSES) (www.rses.org/)
U.S. Environmental Protection Agency (EPA) (www.epa.gov/)
American Boiler Manufacturers Association (ABMA) (www.abma.com/)
Hydronic Heating Association (www.comfortableheat.net/)

Know What You Want
Know What You Want From Your New HVAC System

Before you interview any HVAC contractors in San Francisco, you’ll want to have some knowledge about HVAC systems and your heating and cooling needs. Think about the answers to these questions to get started in the right direction:

  • Do I want a Diamond Certified company that is rated Highest in Quality and Helpful Expertise® and backed by the Diamond Certified Performance Guarantee?
  • What is my budget for a new HVAC system or heating and air conditioner repair?
  • What do I like about my current HVAC unit?
  • What would I change about the HVAC system that’s currently installed in my house?
  • Are there any specifics that will make this job more complicated than average or need to be considered during the planning phase (i.e. planning an addition to the home, special requests for the brand or type of system installed, location of the jobsite or a narrow driveway that may make it hard for work trucks to get to the home, a short time frame, etc.)?
  • Do I plan to live in this home for the long term? Or is it a rental property or a house I plan to sell?
  • What qualities or characteristics do I want in a San Francisco HVAC contractor?

Interview Good Heating and Cooling Contractors in San Francisco
Once you’ve decided what you want from your new heating and cooling system, talk with a few local HVAC contractors in San Francisco and ask them a few questions. You’ll get better results if you write down your questions and keep a record of the answers you get from each of the heating and cooling specialists you interview. The following are some sample questions to start the process.

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What To Ask In Person
Choose the Best Heating and Cooling Companies in San Francisco

A new HVAC system, furnace or home air conditioner is a big investment that should keep you comfortable for years to come. So, before deciding on the best heating and cooling contractor in San Francisco for you, consider the following questions.

  • Can a local heating and cooling contractor in San Francisco meet your needs in terms of products, scheduling, installation, and service?
  • Are the San Francisco HVAC company representatives knowledgeable about the furnaces and air conditioners they install? Can they tell you which brands and systems best meet your needs and why (i.e. energy-efficient furnaces, high-efficiency air conditioners, new furnace installation, Trane HVAC systems, Carrier heaters and AC systems, etc.)
  • Is the HVAC installer sensitive to your budget? Can they offer various brands and heating and cooling systems to fit your needs? Most heating and cooling companies can give you bids for good, better, and best options that give you more control over the price and efficiency of your new furnace and air conditioner.
  • Do the written warranties and guarantees offered by the San Francisco HVAC contractors protect you and your new heating, cooling and ventilation system?
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  • What To Ask References
    Call San Francisco HVAC Company References

    It’s best to choose a Diamond Certified heating and cooling contractor because all certified companies have passed an in-depth ratings process that most other companies can’t pass. If you want quality from a HVAC contractor in San Francisco and the Greater Bay Area, you can have confidence choosing a Diamond Certified company. Diamond Certified reports are available online for all certified companies. And you’ll never be fooled by fake reviews because all research is performed in live telephone interviews of actual customers.

    If you can’t find a Diamond Certified HVAC company within reach, you’ll have to do some research on your own. If you do, it’s wise to call some references provided by the heating and air conditioning companies. Keep in mind that references provided to you by the contractors are not equal in value to the large, random sample of customers surveyed during the Diamond Certified rating process. That’s because references given to customers from local HVAC companies are often cherry-picked instead of randomly selected from all of their customers.

    If you do call references on your own, specifically ask for a list of the company’s 10 most recent customers. Then call several of the references and ask them specific questions about the heating and air conditioning contractor you’re considering. Here are a few sample questions:

    • Were you satisfied with the HVAC installation and the customer service from (HVAC company name)?
    • What type of job did they do for you (HVAC repair or installation, residential air conditioning service, HVAC unit replacement, furnace repair, etc.)?
    • Did the San Francisco heating and cooling contractor you hired complete the work on time?
    • Did the contractor keep you up-to-date on the status of the project?
    • Were there unexpected costs? If so, what were they for and were they avoidable?
    • Did the HVAC installers show up on time?
    • Did they clean up after installing your new furnace or air conditioning system?
    • If you need a new furnace or HVAC repairs in the future, would you use this contractor again?
    • Would you recommend them to friends or family?
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  • Review Your Options
    Choose the Best Heating and Cooling Companies in San Francisco

    The Diamond Certified symbol has been awarded to companies that scored Highest in Quality in an accurate ratings process.

    A new HVAC system is a big investment that should keep you comfortable for years to come. So, before deciding on the best heating and cooling contractor in San Francisco for you, consider the following questions.

    • Can a local heating and cooling contractor in San Francisco meet your needs in terms of products, scheduling, installation and service?
    • Are the San Francisco HVAC company representatives knowledgeable about the furnaces and air conditioners they install? Can they tell you which brands and systems best meet your needs and why (i.e. energy-efficient furnaces, high-efficiency air conditioners, new furnace installation, Trane HVAC systems, Carrier heaters and AC systems, etc.)
    • Is the HVAC installer sensitive to your budget? Can they offer various brands and heating and cooling systems to fit your needs? Most heating and cooling companies can give you bids for good, better and best options that give you more control over the price and efficiency of your new furnace and air conditioner.
    • Do the written warranties and guarantees offered by the local San Francisco HVAC contractors protect you and your new heating, cooling and ventilation system?
    Read moreRead less
  • How To Work With
    Get the Most Value From Your HVAC System

    Most homeowners want the best value from their new HVAC system. But sacrificing quality to save money on a new heating and cooling system may defeat the long-term value you can get from a high-quality, efficient HVAC system installed by experienced and skilled heating and air conditioning professionals.

    To help encourage good HVAC contractors in San Francisco to bid on your job, remember:

    • Look for good value, not just the lowest price. The first question most homeowners ask heating and cooling companies is how much their new furnace and air conditioner will cost, so it’s important to show them you understand the significance of quality products, skilled installation and long-term value.
    • Be upfront with heating and cooling companies if you’re interviewing other local HVAC contractors, but assure them that you’re accepting three fair bids, not dozens of lowball bids.
    • Shop among local heating and cooling companies in San Francisco. Most HVAC installers like to work in the local area because it allows them to provide better service in a more timely manner. Shopping locally shows contractors you’re not looking for cheap HVAC installations, as some fly-by-night furnace and air conditioning services travel long distances to install discounted products that local contractors may not be able to compete with price-wise.
    • Take the long view when purchasing HVAC equipment. Investing in a quality system and having it installed by professional tradesmen can save you more money in the long run than buying a cheaper system or hiring discount HVAC installers.
    • Remember that the installation can be as important to the long-term reliability and functionality of your heating, cooling and ventilation system. Even the best systems require proper installation and maintenance to operate safely and at maximum efficiency.

    Request a Written Estimate and Contract From Your San Francisco Heating and Cooling Specialist
    When you’ve found a San Francisco heating and cooling company that meets all of your requirements, it’s time to sort out the details. Ask for a written estimate and contract that includes a confirmation of the brand and quality of your new HVAC system, any installation details, the price of the system and the labor for installation, and any applicable warranties and HVAC maintenance agreements. You should also get a written timeline that details the job’s start date, major milestones and the expected final installation date.

    You may also write in any additional requests or items you and the heating and cooling company representative have verbally agreed upon. Once you’re happy with the contract and understand all the terms of the agreement, you can sign with confidence.

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  • Be a Good Customer
    Be a Good HVAC Service Customer in These Major San Francisco Areas

    It’s the heating, cooling and ventilation company’s responsibility to put in quality HVAC units using the best possible installation techniques. But you play a big part in the success of your HVAC installation, too. Here are a few simple steps you can take to be a good customer when hiring a heating and cooling contractor in San Francisco.

    • Be clear and upfront with the HVAC company representative. Let them know what you want from your new furnace and air conditioning unit, the long-term outcome you’re expecting, and specific ways they can satisfy your expectations for products and service.
    • Before you hire an HVAC company in San Francisco, restate your expectations and goals and reiterate your understanding of the agreement. Most problems with local cooling, heating and ventilation companies occur because of a breakdown in communication. You can avoid most conflicts by being clear about your expectations and theirs.
    • Ask your HVAC contractor if you should call to check on the progress or if they will call you with updates.
    • Make sure your service representative has a phone number where they can reach you at all times. The work will move along more smoothly if the heating and cooling company can call you with updates, questions or work authorizations.
    • When your contractor contacts you, return calls promptly to keep the installation or HVAC repairs on schedule.
    • Pay for the work promptly.

    San Francisco HVAC contractors appreciate customers who are straightforward, honest and easy to work with. Your good customer behavior sets the tone from your end and creates an environment conducive to a good relationship. Things may very well go smoother and any problems may be more easily resolved.

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Check The Work
Review Your HVAC Service Invoice With Your Local Heating and Cooling Contractor

Once your HVAC system is installed, your heating and cooling professional should supply you with a written invoice. This invoice generally will list:

  • The name, physical address, and license number of the heating and cooling contractor
  • A list of all HVAC work performed
  • An itemized list of the new furnace, air conditioner, and ventilation system installed and any replacement parts needed
  • The total heating and cooling unit installation cost, including an itemized amount due for labor
  • Any applicable warranties or guarantees

Once you’ve reviewed the invoice, it’s smart to compare the work that was actually done to the written document. Ask your cooling and heating contractor to show you the new system installation or HVAC repairs that were done. Check the products and work against the line-item invoice. This is also a good time to have the furnace contractor explain the HVAC unit to you in detail and show you the best steps to take in running and maintaining your new system. If you have questions about the work that was done or any items that seem to be missing or in conflict with your written contract or invoice, this is the time to ask your contractor.

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Written Warranties
Ask San Francisco HVAC Contractors for Written Warranties and Heating and Cooling Equipment Care Instructions

Before your heating and cooling contractor leaves the job, confirm with them any warranties and guarantees you’ve agreed upon. Not all HVAC companies in San Francisco offer warranties on their work and products. But if the company you’ve chosen does, they should give you a written warranty that includes:

  • The HVAC contractor’s name and physical business address
  • The heating and cooling products and work that are covered, including whether the contractor will replace or repair your heating and cooling system or give you a refund if you place a warranty claim
  • Your responsibility if you need warranty work or a replacement furnace or air conditioner (i.e. if you have to pay for labor when filing a claim for warranty work or pay a prorated amount)
  • Terms of and limitations on the new HVAC unit warranty
  • If the new HVAC system warranty coverage is transferable to the new owner if you sell your home
  • Any exclusions to the warranty must be in writing

You should also ask for written care and handling instructions for your new air conditioner and furnace, including when to change air filters and how to handle service issues. Knowing what steps you should take to preserve your unit can help keep it running and efficient for years to come.

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Top 10 Requests
Top Service Requests Provided by San Francisco HVAC Contractors and Air Conditioning Repair Services

The most common air conditioning, heating and ventilation system repairs and services are listed below for your convenience. We’ve also included a list of the most popular brands of HVAC units available in San Francisco, including in the larger neighborhoods of Sunset District, Richmond District, Mission District, Tenderloin, Bernal Heights, Excelsior, Pacific Heights, Nob Hill, North Beach and Bayview District.

AC Repair (Air Conditioner Repair)
San Francisco HVAC contractors perform residential air conditioner repairs to fix broken AC units, replace failing air conditioner parts, upgrade air conditioners with new parts that are more energy-efficient and prepare AC units for seasonal use.

Heater Repair (Furnace Repair)
As with home air conditioner repairs, home heater repairs upgrade old furnace parts, repair broken furnaces, replace failing heater parts and make old heaters more energy efficient for winter home heating. Heater repair technicians can also check for dangerous furnace emissions, such as carbon monoxide, and can fix any potential leaks.

New Furnace Installation in San Francisco
New furnaces can be installed by local San Francisco heating and cooling companies. Furnace installers may put in stand-alone furnaces, or can install a new furnace as part of a home heating and cooling system. In order to get the best results and ensure the safety of your new home heater, furnace installation should only be done by an experienced professional.

HVAC Unit Installation
HVAC unit installation is a complicated process that involves determining the size of heating and cooling equipment that’s needed, which brand and model of HVAC unit is best for your needs, detailed installation methods to keep air conditioner and furnace warranties intact, and the actual installation process which must be done correctly in order to preserve the safety and integrity of the equipment. Experts recommend that HVAC equipment, including air conditioners, heaters, home ventilation systems, boiler systems and furnaces, should be installed by professional HVAC installation companies.

Heating and Air Conditioning Unit Repairs
Air conditioning and heating unit repairs include repairs to the heating and cooling elements, air intake, fans and mechanical components of HVAC units.

Home Ventilation System Installation & Repair
Home ventilation system installation and repairs in San Francisco deal with the air intake vents, exhaust fans, home ventilator, air ducts and ventilation system controls. Some ventilation systems are integrated with heating and cooling systems while others are standalone ventilation systems. Residential ventilation systems remove stale air from the home, bring in fresh air from outside and move the air around inside the home.

Energy Star HVAC Systems in San Francisco
Energy Star HVAC systems sold in San Francisco are heating and cooling units that are Energy Star certified. Energy Star is a labeling system designed by the US Environmental Protection Agency and the US Department of Energy. Energy Star heating and cooling systems, air conditioners, furnaces, boilers and other home comfort systems are extensively tested to ensure high efficiency standards.

Portable Air Conditioning Units
Often seen as window air conditioners or compact air conditioners on wheels, portable air conditioning units are small, movable AC units that are not permanently installed and can be moved from room to room.

Central Air Conditioner Installation
Central air conditioners are cooling and dehumidifying systems that work from a central location in a home or business to distribute cool air throughout the building. Central air conditioners are often installed together with central heating furnaces and are known as HVAC units.

Residential Heating and Cooling System Installation
San Francisco HVAC companies offer installation of residential heating and cooling systems. Installation generally includes removal of old HVAC equipment, installation and custom fitting of new heating and cooling components.

Top 10 Brand Requests for HVAC Equipment in San Francisco

  • Trane Air Conditioning Units
  • Carrier Furnaces & Air Conditioners
  • Goodman Air Conditioners
  • Air Con Systems
  • Frigidaire Air Conditioners
  • Mitsubishi Air Conditioners
  • Bryant Furnaces
  • Amana Air Conditioning & Heaters
  • Lennox Air Conditioning & Furnaces
  • Kenmore Air Conditioners & Heating Units
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Glossary Of Terms
Heating, Cooling and Ventilation Glossary of Terms

air conditioner
A piece of home cooling equipment that controls indoor air temperature, humidity, air quality and movement of cool air. Air conditioning units can be portable air conditioners or central air conditioning systems that stand alone or are part of an integrated HVAC system.

Also known as: air conditioning, home air conditioner, residential air conditioner, air conditioning unit

air filter
An air filter is a device used to remove unwanted particles, dust, vapors and odors from indoor air. Air filters have two functions: protecting HVAC equipment from damage and improving indoor air quality.

Also known as: air filtration units, home air filters, air conditioner filters, furnace filters, HVAC filters

air handler
A piece of equipment that forces hot and cool air through ductwork and out the air vents.

Also known as: air handling system, air fan, HVAC air handler

BTU rating
BTU stands for British Thermal Units. BTUs measure the amount of heat needed to raise one pound of water one degree Fahrenheit. The higher an HVAC system’s BTU rating, the larger the heating capacity of the air conditioner or furnace. Larger homes with more space to heat and cool require HVAC systems with higher BTU ratings.

Also known as: British Thermal Units, BTU ratings, heating capacity rating, cooling capacity rating

Boilers use steam and hot water to heat the air. Some boilers may be more efficient at providing even, draft-free heat than forced-air heaters.

Also known as: hot water steam boiler, boiler system, low pressure boilers, high pressure boilers, steam boiler, hot water boiler, steam system, gas system, oil system, boiler furnace

Capacity is defined as the ability of a heating and cooling system to heat or cool a space. When measured, the cooling capacity of an air conditioning system is generally stated in tons while heating capacity of furnaces and home heaters are measured in BTUs.

Also known as: heating ability, air conditioning ability, cooling ability, HVAC unit capacity

carbon monoxide
Carbon monoxide is a colorless, odorless, toxic gas that is produced when carbon fuels are burned. Carbon monoxide, also commonly called CO2, can leak into a home or business when furnaces or HVAC equipment becomes worn, leaky or is not correctly maintained.

Also known as: CO, CO2

central air conditioning system
Systems that cool indoor air and dehumidify it in one central location and then deliver the cooler air via a system of ducts are known as central air conditioning systems.

Also known as: central air systems, central air conditioning units, central air conditioning

downflow furnace
Downflow furnaces take in cool air at the top of the furnace unit and blow warm air out the bottom of the unit.

Also known as: down flow furnace

Metal duct pipes that form a system of ducts throughout a home or building are referred to as ductwork. Ductwork is used to transfer and circulate air from a heating, cooling and ventilation system throughout the building.

Also known as: ducts, duct system, ductwork system, stainless steel ducts

Energy Star
Energy Star is a government-sponsored branding program that tests and labels energy-efficient appliances and products.

Also known as: Energy Star rated HVAC units, Energy Star appliances, Energy Star heaters, Energy Star air conditioners, eco-friendly HVAC, Energy Star systems

forced air
Systems for heating, cooling, and ventilation that use fans and blowers to move air through the HVAC system and into the home or business.

Also known as: forced air system, forced air HVAC system, forced air HVAC unit

Self-contained heating units that heat air in homes and buildings. Furnaces may be standalone heaters or can be part of a heating, cooling and ventilation system. Some furnaces provide central heating by heating air in one central location and then dispersing it through ducts to heat an entire home, while other heaters are portable furnaces.

Also known as: heaters, home furnace, heater unit, home heating unit, HVAC system, gas furnace, electric furnace, free-standing furnace, central heating unit

HVAC stands for heating, ventilation and air conditioning. It refers to air conditioning and heating systems in homes and other buildings. HVAC can also be used to describe the trade of installing, maintaining and servicing HVAC equipment.

Also known as: heating, cooling and ventilation; heating, cooling, ventilation; heating and cooling; heating and cooling systems; HVACR; heating, ventilation, air conditioning, refrigeration

heat pump
The heat pump is the unit that handles both heating and cooling. In some climates, a heat pump may handle your heating and cooling needs more efficiently than a furnace and air conditioner.

Also known as: heater pump, heating pump, home heat pump

horizontal flow furnace
Horizontal flow furnaces are installed on their sides, enabling them to draw in air from one side, heat the air and push it out the other side to heat the room.

Also known as: furnace, side furnace, horizontal furnace

heating seasonal performance factor
Heating seasonal performance factor (HSPF) measures the heating efficiency of heat pumps. The higher a heat pump’s HSPF, the more efficiently the heat pump works.

Also known as: HSPF

Humidifiers add moisture to the air. Standalone humidifiers are portable and can be moved from room to room. Other humidifiers are available as permanent equipment additions to HVAC systems to add moisture to air as it comes out of the furnace to keep the air in a home or building from becoming too dry when the heater is running.

Also known as: home humidifier, air humidifier, humidifying system

load calculation
Load calculation is a way of computing the cooling and heating power an HVAC system must produce for indoor comfort. The load is influenced by many factors: climate, square footage of the conditioned area, orientation and layout of the building, number of human occupants, room count and dimensions, window and door count and characteristics, insulation quantity and quality, and more.

Also known as: heat gain and loss calculation, heat loss calculation, heat gain calculation, load calculator, HVAC unit load calculation, heating & cooling load calculation, HVAC system load calculator

package system
An outdoor unit that houses heating and cooling blower and coil components, package systems provide heating and cooling for an entire building or home.

Also known as: packaged heat pump, package heat pump, packaged system, package air conditioner, packaged air conditioner, electric cooling package system, gas heating package system, electric heating package system

As used in an air conditioner or air conditioning component of an HVAC system, any chemical used to cool the air is referred to as refrigerant.

Also known as: air conditioning, home cooling, chemical refrigeration, refrigeration, chemical refrigerant

seasonal energy efficiency rating
SEER measures an air conditioner or HVAC unit’s cooling efficiency. The higher the SEER number, the greater the efficiency of the unit.

Also known as: SEER

A thermostat is a device that monitors and controls the temperature inside a home or building. Thermostats may be manually set or can be programmable to heat and cool buildings at certain times.

Also known as: programmable thermostats, wireless thermostats, touch screen thermostats, home thermostats, HVAC thermostats, heating and cooling thermostats, digital thermostat, home  comfort control

upflow furnace
An upflow furnace draws cool air from the bottom of the unit and blows warm air from the top.

Also known as: forced air furnace

ventilation system
Home ventilation systems exchange stale indoor air with to fresh air from outside the home. Ventilation systems often filter the incoming air. Ventilation components are often a standard part of home heating and cooling systems.

Also known as: home ventilators, HVAC system, home ventilation system

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Frequently Asked Questions
FAQs About Local Heating and Cooling Services

Q: Why choose a Diamond Certified HVAC company?
A: Diamond Certified helps you choose a local heating and cooling contractor with confidence by offering a list of top rated local companies that have passed the country’s most in-depth rating process. Only furnace and air conditioning companies rated Highest in Quality and Helpful Expertise® earn the prestigious Diamond Certified award. Most companies can’t pass the ratings. American Ratings Corporation also monitors every Diamond Certified company with in-depth and ongoing research and ratings. And your purchase is backed by the Diamond Certified Performance Guarantee, so you’ll feel confident choosing a Diamond Certified heating and cooling company.

Q: How do I know when it’s time to replace my old HVAC equipment?
A: Only a thorough examination from a good heating and cooling contractor will tell you for sure if you need a new home comfort system, but there are a few tell-tale signs that it may be time to replace your HVAC unit:

  • If your furnace, boiler, heat pump, air conditioner or HVAC system is more than 10-15 years old, you may want to consider replacing it with a newer, more energy-efficient system.
  • If your HVAC equipment needs frequent repairs, doesn’t seem to be heating and cooling your home as well as it used to, or your energy bills are going up.
  • Sudden humidity problems in your home may be a sign of a poorly operating HVAC system or heating and cooling equipment failure.
  • Your HVAC system is very noisy when it runs or seems to be struggling to keep up with your heating and cooling needs. This could signal an undersized system or an underperforming HVAC unit.
  • Excessive dust can be a sign of leaky HVAC ducts.

Q: Some rooms in my house are too hot while others are too cold. What could be causing this?
A: Rooms that are too hot or too cold can be caused by ductwork problems, poor home insulation, inefficient HVAC equipment or a failing heating and cooling system. You should call a qualified heating and cooling contractor for a home energy audit and a check of your HVAC system. A good HVAC contractor should be able to determine what is causing the temperature fluctuations and tell you the best way to fix the problem.

Q: How often should I have my HVAC system serviced?
A: Most HVAC companies recommend having your heating and air conditioning equipment checked at least once a year. Some companies advise having a qualified HVAC technician test your heater/furnace in the fall and your air conditioner tested in the spring. HVAC servicing may help your system last longer and stay efficient because regular heating and cooling system maintenance can help locate problems and fix them before they cause an HVAC system failure, help your system run at peak performance and cut down energy costs, maintain healthy and safe operation, and prolong the life of the furnace and air conditioner equipment.

Q: What features should I look for in a home heating and cooling system?
A: Home comfort systems come with many different features. Your heating and cooling specialist should help you determine which features are best for you, but you may want to spend some time thinking about what is important to you before selecting a home air conditioning unit and furnace. Some HVAC unit features you may wish to consider include home climate control devices such as programmable thermostats, HVAC system noise reduction units, cooling and heating units that preserve home air quality, and high efficiency equipment that helps save money and is better for the environment.

Q: Why should I consider an Energy Star furnace and air conditioner?
A: Energy Star HVAC systems have tested as high efficiency in the Energy Star labeling system designed by the EPA and the US Department of Energy. Energy Star air conditioners, furnaces, boilers and HVAC units may offer better efficiency standards and lower operating costs and environmental costs than competing heating and cooling systems that are not Energy Star certified.

Q: How long will it take to replace my AC and furnace equipment?
A: The amount of time for installation depends on the size of your job, the work you’re having done, and the experience level and detail of your heating and cooling contractor. It can take as few as one or two days to add to an existing HVAC system and up to a week or more to install new furnaces and AC systems. Good contractors will take the necessary time to modify your new heating and cooling unit and ductwork to exactly fit your home.

Q: Do I really need to hire a local heating, cooling and ventilation contractor or can I just install my new HVAC system myself?
A: Poorly installed HVAC systems can be more expensive to run, can wear out sooner than correctly installed heating and cooling systems, and can even pose a danger to your health. If HVAC systems are installed incorrectly, they can even leak toxic gasses into your home. So, it’s important to hire a skilled, licensed HVAC contractor to install, service and inspect your home heating and cooling system. HVAC contractors who know how to do their jobs correctly will install systems without gaps in the ductwork, so systems are more efficient and last years longer than poorly installed systems.

Q: What is the difference between an upflow furnace, downflow furnace and horizontal furnace?
A: These terms simply refer to how a furnace delivers air. An upflow furnace delivers hot or cold air upward, pushing heated or air conditioned air up from the top of the furnace into an overhead HVAC duct system and then out through heater vents or air conditioning vents. A downflow furnace is the opposite, pushing air down through the bottom of the furnace and into the home duct system that runs beneath it. Horizontal furnaces, as the name suggests, lay on their side and push the cooled or heated air out into the ducts from a prone position. Horizontal furnaces are most often used in attics, basements or tight spaces because they maximize space.

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