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Building Efficiency
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We Take The Confusion Out of the Rebate Process
As part of every project, we take the hassle out of navigating the many rebates available to each customer and apply for the… read more
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Locally owned & operated
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Review Highlights
“David Hamburger did the site review/estimating; and office manager, Mae Adams, handled the admin and rebates.” in 46 reviews
“Shortly after Dave and his crew began work, I wanted to make a significant change to the project.” in 6 reviews
“They were also able to get me a significant rebate from PG&E because my home was a lot more energy efficient.” in 20 reviews
About the Business
Business owner information
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David H.
Expert installers for your heat pump heating & cooling, insulation and heat pump water heaters. Family-owned and operated with a proven track record.
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Overall rating
81 reviews
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- Jeremy J.San Mateo, CA552May 13, 2024
David and his team installed a heat pump and heat pump water heater in my home several years ago, and I have been very pleased with them and Building Efficiency's ongoing support. When my garage was flooded in late 2022, David and his team helped troubleshoot the heat pump and made sure everything was running smoothly. More recently, I had plumbing issues that required another service visit, and the team was just as responsive and efficient as before. I highly recommend you go with Building Efficiency for your HVAC needs; they are an excellent value!
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David H.
May 14, 2024
Thanks for the kind words Jeremy!
- Kris D.Mountain View, CA021Jun 6, 2024
I worked at Nest on the thermostat and energy algorithms for over seven years, and so I'm picky when it comes to HVAC contractors. When I look for an HVAC contractor, I don't just want one who shows up on time and cleans up after themself; I want one who understands building energy efficiency and cares about it!
I first worked with David and his team at Building Efficiency when I was in charging of selecting and coordinating an HVAC contractor to perform an energy upgrade for my church. The energy upgrade included installing heat pumps for two different buildings, along with performing a total ductwork replacement and attic insulation upgrade for one building that serves as an office and preschool building. The Building Efficiency team was great to work with, and we love having the heat pumps! Replacing our old fossil fuel-burning gas furnaces with heat pumps that can run on clean electricity was a win for the environment and a win for our comfort.
Having been pleased with how the project at the church went, I referred Building Efficiency to a neighbor of mine and also hired them to upgrade the attic insulation in my own home. Lalo and the crew who did the attic insulation and air sealing work were fantastic, and I appreciated that Lalo went the extra mile to do things like loan me some drywall patching compound so that I could fix a pre-existing hole in my garage ceiling before they blew in the new insulation. I'm very happy with the new cellulose insulation, both because I got rid of all of the old fiberglass insulation and because my home stays warm much better in the winter and cool much better in the summer.
I wouldn't hesitate to recommend Building Efficiency to a friend or neighbor, and I look forward to working with them again in the future.Helpful 1Thanks 0Love this 0Oh no 0 - Zack D.Oakland, CA08Aug 13, 2024
Replaced our entire HVAC system and insulation for our house.
Incredibly responsive, helpful and flexible to meet our scheduling needs. Would recommend to anyone in need of home energy related issues.Helpful 0Thanks 0Love this 0Oh no 0 - Benjamin T.Westlake, Daly City, CA13441Jul 26, 2024
The Building Efficiency team installed 2 heat pumps (1 of them shown in the photos, the other is in a crawlspace that's a little hard to get to), heat pump water heater (shown), new ducts, and attic + kids' room insulation in my 75+ year old home. They did this quickly and efficiently (in under 1 week despite needing to re-duct our home and the random space constraints you'd expect with a 75+ year old home), helping us get the rebates we qualified for and making sure what they put in fit our home. We now have air conditioning (increasingly necessary in the Bay Area) and just better comfort (esp in my kids rooms which used to be too hot or too cold) and the knowledge that everything is electrified (and pairs nicely with our solar installation). They've also gone above and beyond in being responsive to our questions after the install, coming in to rebalance the air flow, answer our questions about air filters, and even troubleshooting a manufacturer's defect. I can't recommend them highly enough!
Helpful 0Thanks 0Love this 0Oh no 0 - Tim D.San Francisco, CA043Apr 1, 2024
We hired Building Efficiency to design and install a heat pump system for our top-level apartment in our 120-year-old Victorian building in San Francisco in 2023. Getting the project started and ordering all the components took longer than we'd anticipated; supply-chain issues may have been at work, but also this is a small company that does high-quality work and has a lot of demand (as other reviewers have noted.). HOWEVER: the work they did was top notch. We had a difficult installation, as there is no easy roof access, and we have very narrow attic crawl space. BE solved all the problems. After six months of operation the system has worked flawlessly. We are comfortable AND power-positive (with the solar power system that was installed by Albion Power at the same time.). The owner David H obviously treats his employees well.
Helpful 0Thanks 0Love this 0Oh no 1 - Matthew ..San Francisco, CA01Nov 12, 2023
These free "consultations" are limited to offering paid services provided by the company - they are not about maximizing the energy efficiency of your home.
In addition, after a month of waiting for an appointment, I had my consultation was told that an estimate would come in a week. After two months of waiting for an estimate - and several unanswered phone calls and emails - I still have not heard back from the company.
If the company was too busy , unable or uninterested to provide services, they could have simply written an email to inform me.
Instead, I have wasted months of my time when I could have sought help elsewhere.Helpful 0Thanks 0Love this 0Oh no 0Business owner information
David H.
Nov 21, 2023
Hi Matthew thanks for your feedback . I wanted to reach out personally and apologize for not getting back to your voicemail ; we should have called you back to make sure you got out the email with estimate and design . I have looked into your file and see the estimate and design was sent 1 week after but i think went to spam or email bounced because file was too big but we didn't get a notification because its sent from our accounting software. We don't have any records of emails from you following your appointment and love to know what address you emailed ? Please reach back out so we can make things right and better understand your needs. My personal email is david@buildingefficiency.net - David Hamburger (Owner)
- Lara E.San Francisco, CA02Feb 12, 2024
Highly recommended. David and his team are all very professional and knowledgeable. From the virtual review of my project all the way through to completion, everyone was helpful as I navigated the very complex topic of electrifying my hot water and heating system. All members of the team were friendly and patient with my numerous questions. They also were responsive every time I reached out and they completed the project within the timeframe they estimated. If you are doing any energy upgrades or electrification projects, I highly suggest you reach out to Building Efficiency.
Helpful 0Thanks 0Love this 0Oh no 0 - David H.Pacifica, CA05Jan 22, 2024
They promised a quote within 7 days, but it took 12 days. They did not keep me updated, and their [former] office manager stopped responding to my emails. When I finally did get the quote, the price was fair, but it was too late. Their competitor delivered a quote after only 1 day.
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David H.
Jan 23, 2024
Hi David,
We apologize for the gap in our communication with you as we transitioned Office Managers. We wish you the best in your home Energy Upgrade project.
Thanks,
Building Efficiency Team - Imran M.San Francisco, CA4143Oct 14, 2022
Excellent work. On time and very good finishing / cleanup.
Seeing the benefits of the upgrade immediately.Helpful 0Thanks 0Love this 1Oh no 0 - Lauren H.San Francisco, CA4123910Mar 14, 2023
We wanted to do energy efficiency upgrades, but didn't know where to start or what we needed. David helped us put together a long-term plan and figured out what we needed. They put in wall insulation, redid the attic insulation, removed our gas furnace and air conditioner in the garage and installed a heat pump in the attic, and installed a heat pump water heater. At some point we'll have them get our crawl space in order too. We are finally on the verge of being 100% electric and removing our gas line! He teams handles all the permits and rebates, and has been patient through all of out delays with PG&E. I don't know anything about this stuff, but the building inspectors have been impressed with both the equipment and the installation work, so I take that as a good sign!
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