Top-rated energy efficiency auditors.

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There are 4 highly-rated local energy efficiency auditors.

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Avatar for Bell Brothers Plumbing Heating & Air

Bell Brothers Plumbing Heating & Air

4.66(
387
)
Approved Pro

Bell Brothers Plumbing Heating & Air

4.66(
387
)
Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
1954 years of experience

We are locally owned and operated, and serving the Bay Area. Our focus is residential air conditioning, heating, Installation of HVAC systems and full-service plumbing. We love working with homeowners and helping to take care of their precious homes. We also keep busy doing light commercial service. Serving California since 1954, financing options available, We don't charge extra for Saturday service calls.

"Called this company for their $77 dollar, which they advertised with a flyer, for a tune-up and cleaning for my heating system. They are a Hayward company and I was told that our Castro Valley home was not in their service area. I bet if I called to buy a new heater they would be out in a day."

Gregory O on March 2023

We are locally owned and operated, and serving the Bay Area. Our focus is residential air conditioning, heating, Installation of HVAC systems and full-service plumbing. We love working with homeowners and helping to take care of their precious homes. We also keep busy doing light commercial service. Serving California since 1954, financing options available, We don't charge extra for Saturday service calls.

"Called this company for their $77 dollar, which they advertised with a flyer, for a tune-up and cleaning for my heating system. They are a Hayward company and I was told that our Castro Valley home was not in their service area. I bet if I called to buy a new heater they would be out in a day."

Gregory O on March 2023


Avatar for Posert Energy Consulting

Posert Energy Consulting

4.72(
44
)
Approved Pro

Posert Energy Consulting

4.72(
44
)
Approved Pro
Customers say: True professional
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
2019 years of experience

At Posert Energy Consulting, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe we can find the sources of high energy bills within an hour or two and set you on a path towards lower energy costs and energy independence. We are committed to eliminating greenhouse gas sources from residences as much as possible which includes our experience that about 2/3rd of the homes we visit have gas line leaks! We are experts, and will always keep you educated about the work process. We look forward to earning your business!

"Pete is fantastic! He called back promptly -- on a holiday -- and fit us in within 24 hrs. He did a home electrical audit, showed us how to read/interpret the smart meter and PG&E website re electrical usage, performed troubleshooting, and narrowed down the problem. Now we can hire an electrician because we know what the issue is! Great guy with a great personality and excellent customer service. Five out of five stars!!!!"

Jennifer L on May 2024

At Posert Energy Consulting, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe we can find the sources of high energy bills within an hour or two and set you on a path towards lower energy costs and energy independence. We are committed to eliminating greenhouse gas sources from residences as much as possible which includes our experience that about 2/3rd of the homes we visit have gas line leaks! We are experts, and will always keep you educated about the work process. We look forward to earning your business!

"Pete is fantastic! He called back promptly -- on a holiday -- and fit us in within 24 hrs. He did a home electrical audit, showed us how to read/interpret the smart meter and PG&E website re electrical usage, performed troubleshooting, and narrowed down the problem. Now we can hire an electrician because we know what the issue is! Great guy with a great personality and excellent customer service. Five out of five stars!!!!"

Jennifer L on May 2024


Avatar for Prosper Construction Development, Inc.

Prosper Construction Development, Inc.

4.88(
38
)
Approved Pro

Prosper Construction Development, Inc.

4.88(
38
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
2013 years of experience

We are a locally owned and operated company that values honesty and integrity, and treats your home as if it were our own. We offer a variety of services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships, and guarantee your satisfaction!

"Fast response and clear communication throughout the process."

Marco T on April 2025

We are a locally owned and operated company that values honesty and integrity, and treats your home as if it were our own. We offer a variety of services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships, and guarantee your satisfaction!

"Fast response and clear communication throughout the process."

Marco T on April 2025


Avatar for Apollo Energies

Apollo Energies

4.25(
2
)
Approved Pro

Apollo Energies

4.25(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2000 years of experience

We are independent energy consultants who reduced our own energy use and saved several hundreds of dollars monthly on our utility bill and made our homes more comfortable and now are helping others achieve similar results. We are not contractors. We do not get paid based on the recommendations we make or the recommendations you choose to do. We want to provide you with what you need to do, explain why you need to do it so that you have all the information you need to make an informed decision. Once you've made the decision on what you want to do, after having all the information necessary to make an informed decision, we will help you implement your decision. We have vetted many home performance contractors and we know they will do the quality work you want and deserve. There are PGE rebates available and financing available that we will show you how to leverage to your advantage. So give us a try. You'll be glad you did.

"Apollo did a fine job assessing my townhomes energy needs. The energy report covered what I needed."

Motiejus R on June 2019

We are independent energy consultants who reduced our own energy use and saved several hundreds of dollars monthly on our utility bill and made our homes more comfortable and now are helping others achieve similar results. We are not contractors. We do not get paid based on the recommendations we make or the recommendations you choose to do. We want to provide you with what you need to do, explain why you need to do it so that you have all the information you need to make an informed decision. Once you've made the decision on what you want to do, after having all the information necessary to make an informed decision, we will help you implement your decision. We have vetted many home performance contractors and we know they will do the quality work you want and deserve. There are PGE rebates available and financing available that we will show you how to leverage to your advantage. So give us a try. You'll be glad you did.

"Apollo did a fine job assessing my townhomes energy needs. The energy report covered what I needed."

Motiejus R on June 2019


Avatar for Enact Systems, Inc.

Enact Systems, Inc.

5.00(
1
)
Approved Pro

Enact Systems, Inc.

5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2014 years of experience

Enact Systems Inc. is committed to excellence every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. We have been in business since 2014, and our accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of the interests of our customers and make their concerns the basis of our business.

"The service was very helpful in getting our solar and battery system connected to our home and the process was very smooth!"

mark c on May 2021

Enact Systems Inc. is committed to excellence every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. We have been in business since 2014, and our accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of the interests of our customers and make their concerns the basis of our business.

"The service was very helpful in getting our solar and battery system connected to our home and the process was very smooth!"

mark c on May 2021


Pinnacle Energy Solutions-Unlicensed Contractor

5.00(
1
)
Approved Pro

Pinnacle Energy Solutions-Unlicensed Contractor

5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2017 years of experience

Pinnacle Energy Solutions has become a staple of professionalism and quality work in San Ramon for years. With decades of experience, there is no job too large or small. Call today to schedule an appointment!

"The thing I appreciate with Steven is, there is no sales pitch! He paired us with best options we have and he always gets back and answers any questions we have to me! Just great!"

Greg N on August 2021

Pinnacle Energy Solutions has become a staple of professionalism and quality work in San Ramon for years. With decades of experience, there is no job too large or small. Call today to schedule an appointment!

"The thing I appreciate with Steven is, there is no sales pitch! He paired us with best options we have and he always gets back and answers any questions we have to me! Just great!"

Greg N on August 2021


Marcucci Heating & Air Conditioning, Inc

4.85(
62
)

Marcucci Heating & Air Conditioning, Inc

4.85(
62
)
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers

Established in 1952, Marcucci Heating has over 8000 customers on file and is rapidly growing. We have proudly held an A+ rating with the Better Business Bureau since 1974 and are an award winning contractor on Angie's List. We accept cash, checks, Visa and MasterCard as acceptable forms of payment. Angie's List Customers are offered a special price of $95 for annual maintenance service for their A/C systems to get ready for the hot summer. As always, we also happily offer free estimates for new equipment installation.

"On a recommendation, I called Marcucci to recharge a wine cellar AC unit. When the service man came out, he quickly advised that the type of unit I have couldn't be open or recharged in a reasonable manner. OK, but that could have been determined at the phone call by asking me what kind of unit it was (an experienced service man would have known this). They charged $150 for the 15 min service call to tell me that. Not happy."

John B on September 2019

Established in 1952, Marcucci Heating has over 8000 customers on file and is rapidly growing. We have proudly held an A+ rating with the Better Business Bureau since 1974 and are an award winning contractor on Angie's List. We accept cash, checks, Visa and MasterCard as acceptable forms of payment. Angie's List Customers are offered a special price of $95 for annual maintenance service for their A/C systems to get ready for the hot summer. As always, we also happily offer free estimates for new equipment installation.

"On a recommendation, I called Marcucci to recharge a wine cellar AC unit. When the service man came out, he quickly advised that the type of unit I have couldn't be open or recharged in a reasonable manner. OK, but that could have been determined at the phone call by asking me what kind of unit it was (an experienced service man would have known this). They charged $150 for the 15 min service call to tell me that. Not happy."

John B on September 2019


Avatar for California Construction Center

California Construction Center

4.77(
198
)

California Construction Center

4.77(
198
)
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

Servicing the Bay Area area since 2005, California Construction Center, Inc is a licensed, bonded and insured general construction company. We have been remodeling properties for residential, commercial and industrial properties. "CCC" is a prestigious company who strives on professionalism and strong client satisfaction results. Our reputable ways allows for us to make and keep professional relationships, as we are in the mind set that the best business appreciation we can get is a referral. Family owned and operated "CCC" has spent many years creating a name for itself as both valued business and as a place where our clients can be treated with the up most dignity and respect. For we value their ideas and strive to give them input without jeopardizing their visions and ideas in the process, in the most respectable fashion possible. "CCC" displays extreme expertise and knowledge in all their business ventures. "CCC". We have aimed to be better than most with the ideals that growth is essential for success. We are proud to share that of many competing companies , "CCC "Was chosen out of 100 top contractors in the Southern California area to be on the hit "TV" show "Flip This House". We would love if your could take a moment to watch the TV show clip from http://www.youtube.com/watch?v=ekxrninanou where you can observe the owners Jonathan and Oz demonstrating their ongoing knowledge and expertise in this extensive field, both Design and Construction. Also click the following testimonial link http://www.youtube.com/watch?feature=player_embedded&v=_eslfll1xiq to view the testimonial video showing our previous clients who have had First hand experiences with "CCC". We value your time and input and strive to do business with both new and old clients, in order to continue to remain the reputable company we strive ourselves as having been this long.

"excellent work"

Justin J J on July 2025

Servicing the Bay Area area since 2005, California Construction Center, Inc is a licensed, bonded and insured general construction company. We have been remodeling properties for residential, commercial and industrial properties. "CCC" is a prestigious company who strives on professionalism and strong client satisfaction results. Our reputable ways allows for us to make and keep professional relationships, as we are in the mind set that the best business appreciation we can get is a referral. Family owned and operated "CCC" has spent many years creating a name for itself as both valued business and as a place where our clients can be treated with the up most dignity and respect. For we value their ideas and strive to give them input without jeopardizing their visions and ideas in the process, in the most respectable fashion possible. "CCC" displays extreme expertise and knowledge in all their business ventures. "CCC". We have aimed to be better than most with the ideals that growth is essential for success. We are proud to share that of many competing companies , "CCC "Was chosen out of 100 top contractors in the Southern California area to be on the hit "TV" show "Flip This House". We would love if your could take a moment to watch the TV show clip from http://www.youtube.com/watch?v=ekxrninanou where you can observe the owners Jonathan and Oz demonstrating their ongoing knowledge and expertise in this extensive field, both Design and Construction. Also click the following testimonial link http://www.youtube.com/watch?feature=player_embedded&v=_eslfll1xiq to view the testimonial video showing our previous clients who have had First hand experiences with "CCC". We value your time and input and strive to do business with both new and old clients, in order to continue to remain the reputable company we strive ourselves as having been this long.

"excellent work"

Justin J J on July 2025


Sandium

4.91(
65
)

Sandium

4.91(
65
)
Customers say: Super punctual
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers

Sandium is the Award Winning South Bay HVAC expert, and we offer you a fresh approach to home performance. Sandium evaluates your house as a whole, identifying your home’s unique characteristics that work side-by-side with your equipment to make your home comfortable. Learn about Sandium's whole-house approach and the road to healthier air and lower bills.

"I get why Sandium has great reviews. They're install services are great and since 99% of systems probably work reliably for years that's the extet of dealing with them. But their after service support has been awful and if you're stuck with a system that fails prematurely then good luck. We paid $40k+ for a brand new Samsung heat pump system and all new ductwork last year. One of our attic air handlers died on Dec 11 taking out our bedroom zone and leaving us with nothing but space heaters for our bedrooms during our first winter with the brand new system. Took till early Jan to finally get it fixed which left us with space heaters over the holidays. Seems crazy to me when we paid a very significant premium for sandium over other competitors truly believing they were the best. Once the temporary fix was in the technician realized that the bearing failed because the cabinet was deformed. That could only have happened in original transit. They ordered a new air handler which took 3+ months to arrive. Now I'm being told this can't be installed till June or July because they're too busy. Given the system is likely to fail when under load this means there's a pretty good chance I'll lose cooling during a heat wave before they can get the new unit in. I'm by no means excited to get this new unit in as it'll be very disruptive and require removing our existing closet built ins but it has to be done. This whole situation is incredibly unacceptable. To take 6-7 months to fix a brand new system is crazy to me. I've really tried to be patient on this and it pains me to leave this review but hopefully anyone who reads this can see how unacceptable this situation is. I'm not even going to get into the back and forth with Samsung and the supply company since I made the check out to sandium and so they should be responsible for the system. When you hire an hvac company, turn around time for fixing things matters. I totally get that things can go wrong but the response to things going wrong matters. Sandium is too busy with new work to bother with that. It's not like fixing this is a favor to me. It's getting my system into the condition it should have been in on day 1."

Daniel F on April 2021

Sandium is the Award Winning South Bay HVAC expert, and we offer you a fresh approach to home performance. Sandium evaluates your house as a whole, identifying your home’s unique characteristics that work side-by-side with your equipment to make your home comfortable. Learn about Sandium's whole-house approach and the road to healthier air and lower bills.

"I get why Sandium has great reviews. They're install services are great and since 99% of systems probably work reliably for years that's the extet of dealing with them. But their after service support has been awful and if you're stuck with a system that fails prematurely then good luck. We paid $40k+ for a brand new Samsung heat pump system and all new ductwork last year. One of our attic air handlers died on Dec 11 taking out our bedroom zone and leaving us with nothing but space heaters for our bedrooms during our first winter with the brand new system. Took till early Jan to finally get it fixed which left us with space heaters over the holidays. Seems crazy to me when we paid a very significant premium for sandium over other competitors truly believing they were the best. Once the temporary fix was in the technician realized that the bearing failed because the cabinet was deformed. That could only have happened in original transit. They ordered a new air handler which took 3+ months to arrive. Now I'm being told this can't be installed till June or July because they're too busy. Given the system is likely to fail when under load this means there's a pretty good chance I'll lose cooling during a heat wave before they can get the new unit in. I'm by no means excited to get this new unit in as it'll be very disruptive and require removing our existing closet built ins but it has to be done. This whole situation is incredibly unacceptable. To take 6-7 months to fix a brand new system is crazy to me. I've really tried to be patient on this and it pains me to leave this review but hopefully anyone who reads this can see how unacceptable this situation is. I'm not even going to get into the back and forth with Samsung and the supply company since I made the check out to sandium and so they should be responsible for the system. When you hire an hvac company, turn around time for fixing things matters. I totally get that things can go wrong but the response to things going wrong matters. Sandium is too busy with new work to bother with that. It's not like fixing this is a favor to me. It's getting my system into the condition it should have been in on day 1."

Daniel F on April 2021


B A Morrison

4.77(
79
)

B A Morrison

4.77(
79
)
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers

B.A. Morrison is a family-owned Heating, Ventilation, Air-Conditioning (HVAC) and General Construction company. We have been in business since 1990 and are fully insured and bonded. Our employees are experienced, trustworthy, and honest tradesmen. We are ready to meet your needs in a timely scheduled manner, to your satisfaction, and at a fair price. We offer free estimates for regularly scheduled maintenance of your HVAC equipment, new and replacement HVAC equipment installation, and your general construction needs. Please consider our service, installation, replacement, or home improvement and remodeling services the next time you have a need for your residential or commercial building.

B.A. Morrison is a family-owned Heating, Ventilation, Air-Conditioning (HVAC) and General Construction company. We have been in business since 1990 and are fully insured and bonded. Our employees are experienced, trustworthy, and honest tradesmen. We are ready to meet your needs in a timely scheduled manner, to your satisfaction, and at a fair price. We offer free estimates for regularly scheduled maintenance of your HVAC equipment, new and replacement HVAC equipment installation, and your general construction needs. Please consider our service, installation, replacement, or home improvement and remodeling services the next time you have a need for your residential or commercial building.

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Energy Efficiency Auditing questions, answered by experts

The answer is a resounding yes, as dishwashers save significant water and energy compared to washing dishes by hand. The difference is so drastic in fact that those who use energy-efficient dishwashers can expect savings of over $450 per year. This is because dishwashers use less water, they wash at a higher temperature than a hand rinse, and you don’t need to rinse them after washing. New dishwashers use around 4 gallons per load, whereas washing by hand can use up to 2 gallons per minute.

The effect a gas fireplace has on your gas bill will depend on how often you use it, the size of the rooms you’re heating with it, and the BTUs of the fireplace itself, but generally speaking, it should only cost a few cents an hour to run it when it’s on. It will consume minimal energy when it’s “off” if you have a pilot light running constantly, but some modern gas fireplaces don’t require a constant pilot light.

Energy-efficient windows are judged on their performance according to a few different factors, including heat transfer, air leakage, light transference, and condensation resistance. If you're unsure whether a window is energy-efficient, look for an ENERGY STAR® label from the U.S. Environmental Protection Agency (EPA). If various products, including windows, meet energy-efficiency standards set by the federal government, the EPA issues this label to help consumers identify energy-efficient products.

It’s not recommended to turn off your breaker box in hopes of saving electricity. Breaker boxes were not designed to constantly be switched on and off. Therefore, turning off breakers unnecessarily can cause costly damage that outnumbers any energy savings. Only flip your breakers if absolutely necessary when troubleshooting an electrical issue.

Some types of electric fireplaces use more electricity than others. Models that produce 1,500 watts will have more of an effect on your heating bill than 750-watt models. 

Electric fireplaces use an average of $1.85 of electricity every eight hours. These minimal operational costs aren’t likely to make a big difference in your electric bill—unless you’re using it as a primary heating source for your home and it’s running most of the time.

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