Building Efficiency

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 g… Read more

We hired Building Efficiency to convert our failed gas water heater to an energy-efficient electric heat pump water heater. David Hamburger did the site review/estimating; and office manager, Mae Adams, handled the admin and rebates. We all worked very well together. Building Efficiency also coordinated nicely with an electrical company doing other upgrades in our home to locate a new 220V/240V line to the site. The Building Efficiency installation team was also very professional and swift in th… Read more

Building efficiency replaced our two 25 year old gas furnaces with heat pumps in late 2022/early 2023, and did a terrific job. The new system is quieter, safer, and more efficient, plus we now have air conditioning, which is becoming more and more necessary on the Peninsula. Dave Hamburger was able to advise us about all different kinds of equipment, and he chose the system that would be best for our house. Sometimes contractors just do the same thing over and over again, but not these guys. The… Read more

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 o… Read more

Building Efficiency installed insulation into my 1800 sf San Francisco house (which had no insulation prior) at the end of 2021. Insulation was installed both into the exterior facing walls (via holes in the interior drywall) and into the very low clearance attic crawlspace (maybe 1.5-2 feet of clearance). They were willing to crawl in the very small attic crawlspace to get the insulation installed – which was impressive b/c the clearance was so low.  Day-to-day life in the house is complete… Read more