Top Rated Home Energy Auditors Serving Fairfax, CA

If you really care about choosing a quality home energy auditor, we’re here for you. Here’s your access to the best home energy auditors serving Fairfax including 94930 and 94978. These energy experts provide home energy assessments and renewable energy options, and they also work on energy efficiency evaluations, home inspections and hers inspections. For 22 years we’ve conducted the most accurate ratings and deepest research of local companies, so you’ll be confident in choosing.

  • Last Updated May 15, 2026
  • 2,196 people sourced companies in Home Energy Auditor
    278 Verified Home Energy Auditor Customers Surveyed
278
2,196
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CalRATERS, Inc.

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CalRATERS, Inc. offers a variety of services that are designed to meet the energy needs of residential clients in the entire Bay Area. In addition to ...
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Main Services

Home Energy Auditor
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Additional Services

Title 24 HERS Inspections, Home Energy Audits, BayREN Rebate Program Processing & Submittals, Energy Compliance Certificates, Duct Leakage Testing, Envelope Leakage Testing, Infrared Imaging, Insulation Inspections

Coverage Areas

Bay Area

Family Owned
Family Owned
Established in 2015
Established in 2015
Special Discount
Special Discount
Live Phone Call Answers
Live Phone Call Answers
Diamond Certified Video Profile
Home Energy Auditor - CalRATERS, Inc. - Bay Area
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Diamond Certified Company Report
Marty Kerr, Owner-CalRATERS, Inc.
Marty Kerr, Owner
Expert Contributions
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  • 53
  • Rating Surveys
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  • 15
  • Photos
    & Videos
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  • 5
  • Researched Articles
Hours CLOSED NOW
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Hassler Heating & Air Conditioning, LLC

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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
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Home Energy Auditor
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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)

Brands

Bosch, Carrier, Mitsubishi, Navien

Coverage Areas

Alameda County, Contra Costa County, Marin County

Family Owned
Family Owned
Established in 1999
Established in 1999
Residential & Commercial
Residential & Commercial
Financing Available
Financing Available
Diamond Certified Video Profile
Heating & Air Conditioning - Hassler Heating & Air Conditioning, LLC - Alameda County
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Diamond certified resource logo
Diamond Certified Company Report
Marcus Muller, General Manager-Hassler Heating & Air Conditioning, LLC
Marcus Muller, General Manager
Expert Contributions
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  • 313
  • Rating Surveys
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  • 45
  • Photos
    & Videos
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  • 5
  • Researched Articles
  • Quick Connect
Hours CLOSED NOW
License:
770180
Learn how to choose a Home Energy Auditor and more…

Diamond Certified Home Energy Auditors Serve These Fairfax ZIP Codes

94930, 94978

Diamond Certified Home Energy Auditors In Fairfax

Diamond Certified home energy auditors serving Fairfax are rated an average of 4.5 out of 5 stars based on 297 reviews of 4 rated home energy auditors.
Diamond Certified home energy auditors in Fairfax Avg. Star Rating.

We make you an expert at choosing a high-quality home energy auditor in the Fairfax area.

For those who love quality local home energy auditors.

Within our Diamond Certified Resource:

You’ll love and refer your friends and family to your new Fairfax area Diamond Certified home energy auditor. They provide expert services, including Green building assessments, energy conservation education, energy-saving upgrades, energy-efficient lighting analyses, weatherization suggestions, and more.

To qualify for Diamond Certified, each company must score Highest in Quality and Helpful Expertise (a 90+ on a 100 scale) and pass all our credential-based ratings. Diamond Certified home energy auditors that serve Fairfax residents include Hassler Heating & Air Conditioning, LLC, and CalRATERS, Inc..

Every Diamond Certified home energy auditor that serves residents in 94930 and 94978 performs various specialties, including appliance energy consumptions, insulation assessments, HVAC system evaluations, indoor air quality assessments, and energy conservation recommendations.

How to Choose a Quality Fairfax Home Energy Auditor for Your Family
  1. Click the name of the company to get to their Diamond Certified Company Report page.
  2. Watch their Diamond Certified Video Profile and other videos that we’ve created for you.
  3. Read their verbatim client survey responses and our researched articles.
  4. Get helpful home energy auditing tips if they are a Diamond Certified Expert Contributor.
  5. Call or email them to schedule an appointment.
Become a Diamond Certified Preferred Member and Join Your Fairfax Neighbors

If you love quality local companies, 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.

Map of Fairfax, CA

Fairfax was founded in 1835, and today, your 11,222 neighbors enjoy bookstores, tennis, beekeeping, skating and outdoor games. Fairfaxians use Diamond Certified home energy auditors for electric meter testing, HERS inspections, energy-efficient lighting analyses, energy conservation recommendations, energy usage analyses, and more.

Frequently Asked Questions for Home Energy Auditor in Fairfax, CA
Q: What are clients of Diamond Certified home energy auditors saying about companies in Fairfax, CA?
A: Verified CalRATERS, Inc. Customer, 1 of 44
"I always give them my highest approval that they will be happy with them and they won't have any problems using them. They are highly recommended. They make my life easy and they take care of everything for me, including the permits. They schedule everything with the city and they work everywhere that we need." - Rachel A.
All Survey Responses for CalRATERS, Inc.
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
Q: What are some of the most popular brands that Diamond Certified home energy auditors use when working with Fairfax residents?
A: Diamond Certified home energy auditors use top-quality brands like General Tools & Instruments, Bacharach Europe Ltd., Fluke Corporation, UEi Test Instruments and TSI Incorporated.
Q: What types of home inspections do home energy auditors offer?
A: Home energy auditors typically offer a variety of energy solutions to homeowners. These solutions can include improving insulation, sealing air leaks, improving ventilation, installing energy efficient lighting and appliances, and upgrading heating and cooling systems. An energy auditor can also recommend the use of alternative energy sources such as solar and wind power, as well as other energy efficient measures. Additionally, an energy auditor can provide advice on how to reduce energy costs through energy conservation practices such as using energy-saving light bulbs and turning down the thermostat.
Q: Can Diamond Certified home energy auditors work with FLIR Systems products and similar items so I can get home energy assessments in Fairfax?
A: Yes, Diamond Certified home energy auditors can work with FLIR Systems products and similar items to provide home energy assessments in Fairfax.
Q: What did people search for when they wanted to find the best quality home energy auditors in Fairfax?
A: Hvac System Evaluations
Home Energy Assessments
Hers Inspections
Home Inspections
Energy Usage Analyses

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