E-fficient HVAC
HVAC contractor in Oakland, CA.
In E-fficient HVAC's own words
Don’t wait until the sun starts blazing or the weather drops to freezing temperatures to call for HVAC assistance. Let us keep your home or business at the temperatures you find most comfortable. We are the experts that reduce the risk of future costs and help you avoid breakdowns when you need your AC or heater most. We offer air conditioning services, tankless water heaters, and HVAC installation. Licensed and insured HVAC contractor — CA License #1033706. Zelle, Bitcoin, Cash, Venmo, Check, Credit Cards accepted. And financing available!
- Trade
- HVAC contractor
- Business address
- 1100 57th Ave Suite #7, Oakland, CA 94621
- Telephone
- (510) 550-5531
- Website
- efficient-hvac.com
- Hours
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- Monday8:00 am - 6:00 pm
- Tuesday8:00 am - 6:00 pm
- Wednesday8:00 am - 6:00 pm
- Thursday8:00 am - 6:00 pm
- Friday8:00 am - 6:00 pm
- Saturday8:00 am - 6:00 pm
- Sunday8:00 am - 6:00 pm
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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Gabriel provided excellent service and saved me from replacing my entire HVAC system. Another company told me the compressor was grounded and that the whole system needed to be replaced. Gabriel took the time to thoroughly inspect and troubleshoot the unit, found the actual problem, and fixed it. He was knowledgeable, honest, professional, and explained everything clearly. My HVAC is now working properly, and I really appreciate that he focused on solving the problem instead of trying to sell me an unnecessary replacement. I highly recommend Gabriel and Efficient HVAC.
Diego D.
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Gabriel serviced 2 furnaces & a water heater and provided me with state-of-the-art information about how to proceed with their maintenance and eventual replacement. Outstanding service and commitment to excellence.
Sue E.
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Gabriel was very professional, efficient and courteous in his work installing a new heating unit . Excellent work, fare price and efficient.
Laura P.
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Gabrielle at E-efficient had been servicing our mini-split for several years. I highly recommend him and his company. They are knowledgable, competent, professional and friendly.
Alan S.
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10/10 customer services! Highly recommend
Tay C.
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E-ffecient HVAC did a wonderful job! Professional from start to finish. I received my quote, great communication regarding installation timeline. Installation took two days. Incredibly neat. Took the time to make sure that I understood how to operate my new thermostat. They truly were what they said they are, EFFECIENT! I would recommend them to anyone looking to change out their HVAC system. 😁
Karren
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Quick turnaround, punctuality and professionalism
Anna K.
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I can always count on Gabriel to provide top notch quality service. He finds sub par work from other technicians and makes it right. You can count on him to get it done correctly and have price of mind that it will be in good working order.
Gary S.
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Gabriel and his crew did a great job installing our Daikin mini-split system. He was easy to work with, hardworking, professional, and the installation came out very clean. He took the time to test both heating and cooling and made sure everything was working properly. The outdoor unit is also extremely quiet. Very happy with the quality of the work and the price. I would definitely recommend him
Anthony P.
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I recently hired E-fficient HVAC to replace my air conditioning system, furnace, and air ducts, and I’m very pleased with the entire experience. From the initial consultation through the installation, the team was professional, knowledgeable, and easy to work with. What I appreciated most was that they provided cost-effective options and took the time to explain the differences between the choices without pressuring me into the most expensive solution. They helped me find a system that offered a good balance of quality, efficiency, and value for my budget. The installation was completed efficiently and with great attention to detail. The team was punctual, kept the work area clean, and made sure everything was working properly before finishing the job. The new AC and furnace are running great, and the replacement ductwork has made a noticeable difference in the airflow and comfort throughout my home. Overall, I feel I received excellent value for the money. I highly recommend E-fficient HVAC to anyone looking for professional HVAC service, quality installation, and affordable, cost-effective solutions. Great work and excellent customer service!
Catherine H.
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Gabriel is a lifesaver! We live in Antioch and our AC died during the hottest week of the summer . Gabriel was super quick to respond and come out to us and fix it . He was also very professional and fair pricing . Cannot recommend Efficient HVAC enough!
Maria G.
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Excellent service..
Linda L.
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I rarely write reviews, but my experience with Efficient HVAC was so far beyond my expectations that I wanted to recognize a company that truly deserves it. I called Gabe because I knew my aging AC system needed to be replaced. I had been hearing about heat pump systems that replace both your air conditioner and furnace, especially how energy-efficient they can be for homes with solar, but I wasn’t sure if it was the right choice. Gabe took the time to explain how the systems work, answered all of my questions, and helped me weigh my options. There was absolutely no sales pressure—just honest, knowledgeable advice. I received quotes from three other companies, and Efficient HVAC offered the best value without cutting corners. From start to finish, everything went exactly as promised. Gabe communicated clearly, set realistic expectations, and delivered on every one of them. The installation was smooth, and his team was professional, courteous, and highly skilled. I’ve had my new heat pump system for a few months now, and I couldn’t be happier. It’s incredibly quiet, keeps my home cooler and more comfortable than my old system, and my energy usage has actually gone down. I’m especially looking forward to seeing the savings this winter now that I won’t be relying on gas heat. If you’re looking for an honest company that does quality work, stands behind its word, and genuinely puts the customer first, I highly recommend Gabe and the entire Efficient HVAC team.
Wendy J.
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Highly recommend! We had an issue with our AC, and E-fficient HVAC came out to address it. Gabriel was professional, diagnosed the problem quickly & had our AC running in no time. He was very knowledgeable & informed me how the AC works, what the readings on his meters mean & what to look out for... data stuff I geek-off of. Thanks!
Carlo F.
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Fantastic experience. Called him, he delivered great service quickly and at a fair price. Would recommend to anyone looking for any hvac service.
Andrew K.
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I recently had the pleasure of working with E-FFicient HVAC, and I can confidently say they are the best in the business! From start to finish, their service was efficient, honest, and truly top-notch. Gabriel, in particular, goes above and beyond to take care of his customers. He took the time to explain everything in detail, ensuring I understood the work being done on my HVAC system. Not only did he address my concerns promptly, but he also provided valuable advice on how to maintain my system for optimal performance. The entire team at E-FFicient HVAC displayed professionalism and expertise that is hard to find these days. I highly recommend them to anyone in need of HVAC services. If you're looking for quality, efficiency, and honesty, look no further than E-FFicient HVAC! Thank you, Gabriel, for your outstanding service!
SAL T.
About E-fficient HVAC
HVAC installation and repair work in Oakland
E-fficient HVAC names HVAC installation, air-conditioning work, and tankless water heaters among its services. Its website also describes maintenance and repair, equipment replacement, heat pumps, and mini-splits.
The company says it works in Oakland and nearby communities including San Francisco, Berkeley, Richmond, Concord, and Pleasant Hill. Financing is available.
E-fficient HVAC’s rating, reviews, and daily hours
E-fficient HVAC has a 5.0 rating from 17 reviews. Reviewers most often mention troubleshooting, clear explanations of repair or replacement choices, installation work, communication, and orderly work areas.
Hours run from 8:00 am to 6:00 pm every day. Reviews also mention furnace, water-heater, air-conditioning, duct, and mini-split work.
Heating equipment work in Oakland
In Oakland, utility gas heats 61% of housing units per the American Community Survey, 2024. NOAA normals for 1991-2020 put Oakland’s mean temperature at 59.9°F, with an average high of 70.0°F and an average low of 49.8°F.
E-fficient HVAC holds California license #1033706 and is insured.
Its website specifically names heat pumps and mini-splits alongside its installation, replacement, maintenance, and repair work.
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 Oakland
About Oakland
| Population | 440,838 (2025) |
|---|---|
| County | Alameda County |
| Average yearly snowfall | 0 inches |
| Heating degree days | 2,428 |
| Most common heating fuel | Utility gas |
Sources: U.S. Census Bureau. NOAA U.S. Climate Normals 1991-2020.