If you really care about choosing a quality hvac contractor, we’re here for you. Here’s your access to the best hvac contractors serving Marshall including 94940. These heating and air conditioning experts provide furnace repair and air filtration, and they also work on HVAC ductwork, commercial air conditioning and HVAC maintenance plans. For 22 years we’ve conducted the most accurate ratings and deepest research of local contractors, so you’ll be confident in choosing.
Last Updated May 15, 2026
148,521 people sourced companies in Heating & Air Conditioning
16,331 Verified Heating & Air Conditioning Customers Surveyed
Kelly Plumbing & Heating, Inc. installs the latest technology in forced air furnaces, heat pumps and air conditioning systems for residents of Marin C...
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Main Services
Heating & Air Conditioning
Additional Services
Central Heat Pump Systems, Forced Air Heating & Air Conditioning, Radiant Heat Boilers & Installations, Tankless & High Efficiency Water Heaters, Attic Fans, Air Duct Cleaning, Dryer Vent Cleaning, Duct Insulation, Heat Pump Water Heaters
Moore Home Services specializes in the installation of energy-efficient replacement systems. The company services, repairs, and installs all types and...
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Main Services
Heating & Air Conditioning
Plumbing
Additional Services
Residential Air Conditioning and Heating, Including Maintenance, Repair and Equipment Replacement; Ductwork; Zoning; Air Filtration; Indoor Air Quality System Installation; Insulation; ThermaShield Radiant Barrier Installation; Water Heaters; Tankless Water Heaters; Water Filtration Systems; Water Conditioning Systems; Plumbing Maintenance, Repair and Replacement; Sewer Replacement; Drain Clearing; Hydro Jetting Services
Hassler Heating & Air Conditioning, LLC is leading the way in California’s electrification efforts, providing comprehensive HVAC services that include...
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Main Services
Heating & Air Conditioning
Home Energy Auditor
Additional Services
Central Ducted Heat Pump, Ductless Mini-Split Heat Pump, Water Heater (Standard, Tankless, Heat Pump, Electric Resistance), Furnace, and A/C Installations and Repairs, Home Energy Assessments and Home Energy Score (HES) Assessments, Energy Upgrade Measures (Building Shell)
Enviro Heating & Air Conditioning, Inc. installs, repairs, and maintains all types of HVAC equipment for residential and commercial clients in Sonoma,...
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Main Services
Heating & Air Conditioning
Air Duct Cleaning
Additional Services
Air Duct Cleaning, HVAC Repair, Installation & Maintenance, Sheet Metal Fabrication
Ongaro & Sons provides a complete range of plumbing services for residential and commercial clients in Sonoma and Marin Counties. In addition to servi...
Diamond Certified Hvac Contractors Serve These Marshall ZIP Codes
94940
Diamond Certified Hvac Contractors In Marshall
Diamond Certified hvac contractors serving Marshall are rated an average of 4.6 out of 5 stars based on 1828 reviews of 77 rated hvac contractors. Diamond Certified hvac contractors in Marshall Avg. Star Rating.
We make you an expert at choosing a high-quality HVAC contractor in the Marshall area.
For those who love quality local HVAC contractors.
Within our Diamond Certified Resource:
You choose from only top rated Diamond Certified HVAC contractors that serve our Marshall area.
You see each contractor’s deeply researched report from our research.
You’ll love and refer your friends and family to your new Marshall area Diamond Certified HVAC contractor. They provide expert services, including HVAC maintenance plans, HVAC upgrades, HVAC ductwork, ventilation systems, energy-efficient HVAC work, and more.
Every Diamond Certified HVAC contractor that serves residents in 94940 performs various specialties, including HVAC troubleshooting, thermostat installation, indoor air quality, HVAC repairs, and cooling system installations.
How to Choose a Quality Marshall Hvac Contractor for Your Family
Click the name of the contractor to get to their Diamond Certified Company Report page.
Watch their Diamond Certified Video Profile and other videos that we’ve created for you.
Read their verbatim client survey responses and our researched articles.
Get helpful heating and air conditioning tips if they are a Diamond Certified Expert Contributor.
Call or email them to schedule an appointment.
Become a Diamond Certified Preferred Member and Join Your Marshall Neighbors
If you love quality local contractors, this is for you. Become a Diamond Certified Preferred Member (always free) and get a double performance guarantee, extra guides and tips, our annual Diamond Certified Directory, and more.
Your Diamond Certified Resource. We make you an expert at choosing.
We make you an expert at choosing local companies by giving you the most accurate ratings, deeply researched company reports and Diamond Certified Guide of all Resource Guides, which cover 70+ industries in the Auto, Home, Health and Personal service categories. Each guide contains 16 key articles that are separated into “Before, During and After the Job” tabs. These are written to guide you through each phase of hiring, starting, managing and ending a job in that specific type of service.
Diamond Certified Resource Compared to Crowd-Sourced Review Sites
Diamond Certified Resource’s ratings of local companies are based on surveys of only verified real customers, so they are the most accurate. This beats crowd-sourced review sites like Yelp, Angi or even Google that are plagued with fake, manipulated, cherry-picked and non-customer reviews, which produce inaccurate and often inflated rating scores.
Diamond Certified Resource’s deeply researched reports of top rated Diamond Certified companies include everything you need to see to be very confident in choosing a top rated local company. Each company report includes detailed quality ratings and scoring, verbatim customer survey responses, a profile video, a company story video, a capabilities table, a photo gallery, researched articles, unique expert contributions from the company’s owner, and more. This beats crowd-sourced review sites that solicit companies to “claim their business listing” and add any type of info to their profiles. This sounds good, but it has led to company profiles that are littered with false claims and incomplete info.
Marshall was founded in 1872, and today, your 2,135 neighbors enjoy running, redwood forests, wildflower viewing, clamming and forest wandering. Marshallians use Diamond Certified HVAC contractors for ventilation systems, heating, air conditioner repair, commercial air conditioning, AC tune ups, and more.
Frequently Asked Questions for Heating & Air Conditioning in Marshall, CA
Q: What are clients of Diamond Certified hvac contractors saying about contractors in Marshall, CA?
A: Verified Kelly Plumbing & Heating, Inc. Customer, 1 of 429 "I would recommend Jim Kelly. He's professional, competent, and an expert in the heating and air world. I find them to be reliable, timely, professional, and accommodating. I've never had any sort of issue with anything they've done for me." - Emily K. All Survey Responses for Kelly Plumbing & Heating, Inc. Verified Moore Home Services Customer, 1 of 450 "They were reasonably priced and they helped me get a new furnace right after my husband passed away. I was very happy with the manager who came and set it up. They were very timely. Their service and price were very reasonable." - Julie C. All Survey Responses for Moore Home Services Verified Hassler Heating & Air Conditioning, LLC Customer, 1 of 313 "They are amazing. I needed work done within a certain time frame, and they were able to get someone on the jobsite and completed the work within the time frame that I had. I liked that they were efficient, the staff and their service." - Jasmine S. All Survey Responses for Hassler Heating & Air Conditioning, LLC Verified Enviro Heating & Air Conditioning, Inc. Customer, 1 of 199 "I like that they are local. It's a husband and wife who work together and the wife takes care of everything, answers the phone and distributes the workers. The husband fixed a furnace a couple of years ago and coaches little league, which is a plus. He stopped on his way home on the weekend and fixed it when no one else would. I'm going to be a lifelong customer as long as they are in business. They are a local, family run business and they explain to me everything that they are doing. If they adjust the jets, they tell me, show me everything and let me watch." - David M. All Survey Responses for Enviro Heating & Air Conditioning, Inc. Verified Ongaro & Sons Customer, 1 of 305 "I'd highly recommend them. There was someone here in the area that I used for years, but he retired. So when I needed some help after that, I looked around, randomly picked them, and I've been very happy ever since. They're always here on time. Everything was very good and very matter of fact. What they said they were going to do, they did." - Lisa F. All Survey Responses for Ongaro & Sons
Q: What are some of the most popular brands that Diamond Certified hvac contractors use when working with Marshall residents?
A: Diamond Certified hvac contractors use top-quality brands like Fujitsu, Armstrong Air, Goodman, Johnson Controls and Mitsubishi Electric.
Q: What types of energy-efficient HVAC work do hvac contractors offer?
A: HVAC contractors typically offer a variety of air filtration options, such as HEPA filters, activated carbon filters, electrostatic filters, and ultraviolet (UV) light filters. HEPA filters are high efficiency particulate air filters that can remove up to 99.97% of airborne particles that are 0.3 microns or larger in size. Activated carbon filters are great for removing volatile organic compounds (VOCs) and odors from the air. Electrostatic filters use an electric charge to attract particles, and UV light filters use a UV light to destroy airborne particles.
Q: Can Diamond Certified hvac contractors work with Carrier products and similar items so I can get furnace repair in Marshall?
A: Yes, Diamond Certified hvac contractors in Marshall can work with Carrier products and similar items for furnace repair.
Q: What did people search for when they wanted to find the best quality hvac contractors in Marshall?
If your energy bills keep rising or certain rooms in your home never have the right temperature, the issue may be what’s behind the walls and above the ceiling.
Indoor air quality projects address a wide range of areas and problems, from duct cleaning to asbestos removal. The most commonly requested indoor air quality services are:Infiltro
In your quest to perfect your indoor air quality system, you’ll encounter a large volume of extra features and technical specifications. The following glossary provides definitions
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