Building Efficiency, Inc.
HVAC contractor in San Francisco, CA.
In the words of Building Efficiency, Inc.
We are a full-service contractor with a focus on installing heating, cooling, insulation and water heaters. We specialize in electrification of older gas systems for home energy efficiency.
- Trade
- HVAC contractor
- Business address
- 2037 Irving St Ste 213, San Francisco, CA 94122
- Telephone
- (415) 831-4535
- Website
- buildingefficiency.net
- Hours
-
- Monday9:00 am - 5:00 pm
- Tuesday9:00 am - 5:00 pm
- Wednesday9:00 am - 5:00 pm
- Thursday9:00 am - 5:00 pm
- Friday9:00 am - 5:00 pm
- SaturdayClosed
- SundayClosed
From the business's Google listing, checked Oct 2026
- Register
- CA register
Recorded as supplied and as found in public sources. This register makes no credential or quality claim about any business; check license status with the state board.
Google Reviews
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Building Efficiency upgraded our typical Berkeley bungalow, insulating our walls and crawlspace, replacing our central gas heating with a ducted heat pump system and replaced our water heater with a Sanco2 heat pump. We've lived with the systems for 2-1/2 years and couldn't be happier! We went from $950 a year in utility bills to $165 the first year, and even with PGE rates climbing, we're still at less than a third the cost we used to pay. Our house is much more comfortable, and the insulation paid additional dividends by making things so much more quiet! ...thumbs up for BE.
Chris D.
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Building Efficiency evaluated the property and educated us thoroughly before providing a competitive to install a heat pump and water heater. They communicated well, kept a clean work site, and the staff was professional and efficient. We've been very happy with the results.
J M.
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A Heat Pump was installed by Building Efficiency, replacing my old gas furnace. This enabled me to have a good heat source without the smell of a gas furnace and to have AC when needed. They worked closely with me to establish the best location for the heat pump (which does generate some noise of its own), were clear about the time frame in which we neede to schedule the work, and cleaned up afterward. They also continued support of the project afterward to fine tune the interior filter which had been making noise (fixed!) and helped me to understand the different ways for the new thermostat to be used. Staff was helpful, friendly, respectful of my home and my schedule. (I noted in services provided both heat and AC as Heat Pump was not a specific item listed. The price was considerable higher than the 2000 top price to choose in the cost listings! Over 20K.
CA T.
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I thought the quote was competitive and they got the work done. Professional operation. The owner checked in after and helped me set up the wifi for my water heaters. Class act.
mark C.
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I've worked with David and team on three different projects - insulating our house, installing a whole house fan, and installing a new furnace and air conditioning - and have been extremely satisfied each time. The work is completed in a timely manner, the prices are reasonable (I did shop around), and team members are very professional and courteous, they have a great deal of expertise, and do high quality work. They also provide great post installation support. When our furnace recently stopped working the week before Christmas, we were in a bind as we were leaving town and could not leave our pet in a freezing home. David came out himself even though his schedule was full and managed to get everything working before we left. I would highly recommend these guys and we will continue to use them on our own future projects.
Jeff S.
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The entire project for a new heat pump HVAC, from system design to estimate through installation was highly professional; everyone was a pleasure to work with.
Terry S.
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We had a heat pump water heater installed several months ago. The Building Efficiency team was excellent, did great work on the installation and completed it right around when they said they would. Unfortunately, the water heater died within a month of the install, but the Building Efficiency team stood by their work and came back out to swap out the unit, covered by the warranty. We're hoping to get a heat pump hvac someday and will definitely be back in touch for a quote.
Jake E.
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Incredible team, professional, terrific communication and great clean work. Absolutely recommend.
Erica J.
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Building efficiency was very easy to work with thru all phases of my project: from initial consultation, through rebate applications to the actual project itself. Reliable and professional.
Erin S.
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The Building Efficiency team was a joy to work with. They made my life easy at every step of the process.
John O.
About Building Efficiency, Inc.
Building Efficiency, Inc. focuses on replacing older gas-based home systems with electric heating and cooling equipment. The company says its work includes heating, cooling, insulation and water-heater installation, with electrification as a stated specialty.
Heat pumps and electrification in San Francisco
The company names heat-pump water heaters, air conditioning, ductless mini-splits and indoor air quality among its services. It also describes work for residential and commercial properties, including multi-unit buildings. The company points to rebates, financing and tax credits as part of the project-planning conversation.
In San Francisco, utility gas heats 55% of housing units in 2024, per the American Community Survey. NOAA normals for 1991-2020 put the city’s average high at 62.9 degrees F, average low at 51.0 degrees F, and mean temperature at 56.9 degrees F.
Building Efficiency’s rating and weekday schedule
Reviewers most often mention heat-pump HVAC and water-heater projects, insulation work, communication during planning, clean job sites and support after installation. Some reviews also describe help with system design, thermostat use, rebate applications and warranty-related follow-up.
The business is open from 9:00 am to 5:00 pm Monday through Friday, and is closed Saturday and Sunday. Its stated work combines HVAC equipment with insulation and water-heating upgrades rather than treating those as separate projects.
Insulation alongside heating and cooling work
Customer accounts describe gas-furnace replacements, ducted heat-pump installations, central air work, whole-house fans and insulation in walls, attics and crawlspaces. The company’s emphasis on heat transfer equipment and insulation places those projects within a broader home-efficiency approach.
For property owners considering a heat-pump system, Building Efficiency, Inc. presents both heating and cooling equipment, water heating and building-envelope work as part of its offered services.
Services, brands and warranty details come from the company's own website. Ratings, hours and reviews come from Google. Town figures come from the US Census and NOAA.
More HVAC contractors in San Francisco
About San Francisco
| Population | 826,079 (2025) |
|---|---|
| County | San Francisco County |
| Heating degree days | 3,020 |
| Most common heating fuel | Utility gas |
Sources: U.S. Census Bureau. NOAA U.S. Climate Normals 1991-2020.