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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon45
    Verified energy efficiency auditing services reviews

Find Energy efficiency auditors in Mercer Island

Avatar for Evergreen Home Heating & Energy

Evergreen Home Heating & Energy

727 S Kenyon St
4.59(
97
)
Approved Pro

Evergreen Home Heating & Energy

727 S Kenyon St
4.59(
97
)
Approved Pro
Customers say: Super punctual
55 local quotes requested
50 years of experience

For 45 years we’ve been making Puget Sound homes the most healthy, energy efficient and comfortable homes in the country. Our experienced team brings decades of expertise installing and maintaining the most innovative and efficient technology. As a Mitsibushi Cooling and Heating Diamond Contractor, Evergreen Home Heating and Energy has some of the world's most efficient and innovative products available.

"We had Evergreen Home Heating and Energy install a new water heater and furnace, and unfortunately, the quality of their work has been disappointing. Recently, I noticed several issues with the intake and exhaust pipes. Several hanger straps attached to the wall are broken, and one of the joints on the water heater exhaust pipe is leaking water. I suspect this leak is caused by the imbalance due to the broken hanger straps. I expected a professional and reliable installation from Evergreen Home Heating and Energy, but these problems indicate a lack of attention to detail and quality. Based on my experience, I cannot recommend Evergreen Home Heating and Energy. If you’re considering them for your home needs, be cautious and perhaps look elsewhere."

Gao Z on June 2024

For 45 years we’ve been making Puget Sound homes the most healthy, energy efficient and comfortable homes in the country. Our experienced team brings decades of expertise installing and maintaining the most innovative and efficient technology. As a Mitsibushi Cooling and Heating Diamond Contractor, Evergreen Home Heating and Energy has some of the world's most efficient and innovative products available.

"We had Evergreen Home Heating and Energy install a new water heater and furnace, and unfortunately, the quality of their work has been disappointing. Recently, I noticed several issues with the intake and exhaust pipes. Several hanger straps attached to the wall are broken, and one of the joints on the water heater exhaust pipe is leaking water. I suspect this leak is caused by the imbalance due to the broken hanger straps. I expected a professional and reliable installation from Evergreen Home Heating and Energy, but these problems indicate a lack of attention to detail and quality. Based on my experience, I cannot recommend Evergreen Home Heating and Energy. If you’re considering them for your home needs, be cautious and perhaps look elsewhere."

Gao Z on June 2024


Avatar for AAA Heating & Air Conditioning

AAA Heating & Air Conditioning

22641 83rd Ave S
4.81(
227
)
Approved Pro

AAA Heating & Air Conditioning

22641 83rd Ave S
4.81(
227
)
Approved Pro
Customers say: True professional
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
89 local quotes requested

We’ve Got Experience On Our Side! Our technicians have top level training and are EPA certified. It doesn’t get any better than that. You can bank on our technical expertise to solve just about any problem. We’ve heard and seen it all. Award winning. Additional DBA - AAA Heating & AC Inc. Financing AOC.

"Aside from a hiccup around scheduling some ancillary repairs the quoted price was reasonable and the work was done to spec."

Brandon N on January 2025

We’ve Got Experience On Our Side! Our technicians have top level training and are EPA certified. It doesn’t get any better than that. You can bank on our technical expertise to solve just about any problem. We’ve heard and seen it all. Award winning. Additional DBA - AAA Heating & AC Inc. Financing AOC.

"Aside from a hiccup around scheduling some ancillary repairs the quoted price was reasonable and the work was done to spec."

Brandon N on January 2025


Avatar for Seatown Electric Plumbing Heating & Air

Seatown Electric Plumbing Heating & Air

4200 78th St SW
4.79(
1,337
)
Approved Pro

Seatown Electric Plumbing Heating & Air

4200 78th St SW
4.79(
1,337
)
Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
1877 local quotes requested

As a provider of essential services here in the Puget Sound Region, Seatown Electric Plumbing Heating & Air remains open to serve you. To ensure the safety of our customers our technicians' health is monitored closely and we are following the highest safety recommendations, including the use of masks and protective gloves. The health and wellness of our customers and employees will always come first. We are here for you! Seatown provides Electrical, Plumbing, Heating, and A/C services in the Greater Puget Sound region, concentrating in King and Snohomish county. With our customer satisfaction guarantee, you can rest assured that your system will outlast industry standards, providing safety, and comfort for your home, for many years to come. You will never have to search for a new electrical, plumbing or heating and air contractor again. That is our promise. Seatown continues to lead Angie's List, with overall "A" reviews, by serving one customer at a time and giving top-notch service. We hope to build long-lasting customer relationships, throughout Washington State. Our world-class technicians will show up to your door in clean uniforms, with visible ID and state certification, trained to over-exceed your expectations, and never leaving a mess behind. We are Seatown Electric Plumbing Heating And Air, Washington's all in one contractor.

"It was way too expensive for the work that was performed. They originally said that the pipes leading up to the faucet may need to be replaced and the wall opened up. Previously before engaging them. I asked for a possible quote for how much it would cost and they told me that it was up to the technician. When they came out to do the work that they would determine the amount. I asked the technician how much it would and he told me that it was up to the company to decide for how much the work would cost. When I contacted the company they told me again that it would be up to the technician to determine the how much it would cost by checking the amount of work. I could not get an answer from both of them because they would just keep passing each other on who to ask for the quote. After the project was completed, I was given the bill of about $750+ to replace the faucet, to replace the hoses and the two knobs roughly $350+ each. When I called the company about the price, I was transferred to the dispatchers and was told that I need to talk to the technician for it."

Peggy M on September 2025

As a provider of essential services here in the Puget Sound Region, Seatown Electric Plumbing Heating & Air remains open to serve you. To ensure the safety of our customers our technicians' health is monitored closely and we are following the highest safety recommendations, including the use of masks and protective gloves. The health and wellness of our customers and employees will always come first. We are here for you! Seatown provides Electrical, Plumbing, Heating, and A/C services in the Greater Puget Sound region, concentrating in King and Snohomish county. With our customer satisfaction guarantee, you can rest assured that your system will outlast industry standards, providing safety, and comfort for your home, for many years to come. You will never have to search for a new electrical, plumbing or heating and air contractor again. That is our promise. Seatown continues to lead Angie's List, with overall "A" reviews, by serving one customer at a time and giving top-notch service. We hope to build long-lasting customer relationships, throughout Washington State. Our world-class technicians will show up to your door in clean uniforms, with visible ID and state certification, trained to over-exceed your expectations, and never leaving a mess behind. We are Seatown Electric Plumbing Heating And Air, Washington's all in one contractor.

"It was way too expensive for the work that was performed. They originally said that the pipes leading up to the faucet may need to be replaced and the wall opened up. Previously before engaging them. I asked for a possible quote for how much it would cost and they told me that it was up to the technician. When they came out to do the work that they would determine the amount. I asked the technician how much it would and he told me that it was up to the company to decide for how much the work would cost. When I contacted the company they told me again that it would be up to the technician to determine the how much it would cost by checking the amount of work. I could not get an answer from both of them because they would just keep passing each other on who to ask for the quote. After the project was completed, I was given the bill of about $750+ to replace the faucet, to replace the hoses and the two knobs roughly $350+ each. When I called the company about the price, I was transferred to the dispatchers and was told that I need to talk to the technician for it."

Peggy M on September 2025


Avatar for Washington Energy Services

Washington Energy Services

3909 196th St SW
4.51(
958
)
Approved Pro

Washington Energy Services

3909 196th St SW
4.51(
958
)
Approved Pro
Customers say: Super punctual
270 local quotes requested
68 years of experience

Washington Energy Services has been helping homeowners throughout Western Washington save money and live more comfortably since 1957. As one of the largest home improvement companies in the Seattle-Tacoma area, we are able to provide you with top-quality products and services, installed by our professional craftsmen. Our free in-home estimates ensure you get the right product for your home. We'll be with you through all aspects of your project from the purchase decision, expert installation, quality maintenance and service, and even warranty work should you need it. We assist with permits and rebates, too. Give Washington Energy Services a call today to learn more or to schedule your service.

"This review is long overdue in my praise of Washington Energy Services for their customer service, pricing and workmanship ! My first interaction was in 1999 when they installed windows throughout my house. They are still in excellent condition. I might note I called them over 20 years later to inquire on how I could repair a broken slider and they sent someone right out, charging a very nominal amount to repair it. In 2020, I needed to replace my hot water tank, and the extremely knowledgeable Christy presented several options, answering my many questions. I settled on one with a booster that seemed to best fit my needs. Finally, in December 2023, I purchased a new gas furnace from WES. I had a minor issue with a fan switch and they responded quickly to rectify the situation. Within the past two months, I seemed to be having an issue with my thermostat (something they had not installed), and the manager, Greg, came out twice with his crew to explore the problem. Today they installed a new thermostat FREE OF CHARGE! Their excellent response and customer service is beyond any company I have hired. And I particularly love that they are family owned and have been around for decades. Their employees seem to be there for the long haul, which speaks highly of the owner. I refer all my friends and family and I won't go anywhere else for services that they offer. Many thanks to the staff I have interacted with over the past 25 years!"

Joan K on March 2025

Washington Energy Services has been helping homeowners throughout Western Washington save money and live more comfortably since 1957. As one of the largest home improvement companies in the Seattle-Tacoma area, we are able to provide you with top-quality products and services, installed by our professional craftsmen. Our free in-home estimates ensure you get the right product for your home. We'll be with you through all aspects of your project from the purchase decision, expert installation, quality maintenance and service, and even warranty work should you need it. We assist with permits and rebates, too. Give Washington Energy Services a call today to learn more or to schedule your service.

"This review is long overdue in my praise of Washington Energy Services for their customer service, pricing and workmanship ! My first interaction was in 1999 when they installed windows throughout my house. They are still in excellent condition. I might note I called them over 20 years later to inquire on how I could repair a broken slider and they sent someone right out, charging a very nominal amount to repair it. In 2020, I needed to replace my hot water tank, and the extremely knowledgeable Christy presented several options, answering my many questions. I settled on one with a booster that seemed to best fit my needs. Finally, in December 2023, I purchased a new gas furnace from WES. I had a minor issue with a fan switch and they responded quickly to rectify the situation. Within the past two months, I seemed to be having an issue with my thermostat (something they had not installed), and the manager, Greg, came out twice with his crew to explore the problem. Today they installed a new thermostat FREE OF CHARGE! Their excellent response and customer service is beyond any company I have hired. And I particularly love that they are family owned and have been around for decades. Their employees seem to be there for the long haul, which speaks highly of the owner. I refer all my friends and family and I won't go anywhere else for services that they offer. Many thanks to the staff I have interacted with over the past 25 years!"

Joan K on March 2025


Avatar for Smart Electric, Heating & Air

Smart Electric, Heating & Air

11411 51st Ave SE
4.94(
64
)
Approved Pro

Smart Electric, Heating & Air

11411 51st Ave SE
4.94(
64
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
262 local quotes requested

We are a family-owned and operated business dedicated to the highest standards of workmanship, safety, and customer service. We specialize in home remodels, new construction, knob-and-tube rewires, smart home automation, generator installation, as well as general home electrical needs. We have extensive experience in helping our customers design home electrical layouts and features to best meet their needs and budgets. No job is too big or small for our team - we just love what we do!

"This is hands down the only electrical/hvac company you need in your phone. Easiest, most efficient owner and teams you will find in the Seattle area hands down. Been working with these guys for 7 years, each project we tackle is actually fun because they make it so easy!"

Jordan R on February 2025

We are a family-owned and operated business dedicated to the highest standards of workmanship, safety, and customer service. We specialize in home remodels, new construction, knob-and-tube rewires, smart home automation, generator installation, as well as general home electrical needs. We have extensive experience in helping our customers design home electrical layouts and features to best meet their needs and budgets. No job is too big or small for our team - we just love what we do!

"This is hands down the only electrical/hvac company you need in your phone. Easiest, most efficient owner and teams you will find in the Seattle area hands down. Been working with these guys for 7 years, each project we tackle is actually fun because they make it so easy!"

Jordan R on February 2025


Avatar for Evergreen Energy Services

Evergreen Energy Services

704 228th Avenue Northeast, Suite 734
4.93(
20
)
Approved Pro

Evergreen Energy Services

704 228th Avenue Northeast, Suite 734
4.93(
20
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
15 years of experience

With many years of experience serving the Washington's surrounding area, Evergreen Energy Service is your solution for all your Home energy needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Satisfaction guaranteed!

"Kirk performed a thorough blower door test, walking me through every point that he later included in his report. With his report in hand, I have confidence in my understanding of the priority improvements that I can make to my sealing my home's envelope, which is precisely what I'd hired him for."

Garrett M on October 2023

With many years of experience serving the Washington's surrounding area, Evergreen Energy Service is your solution for all your Home energy needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Satisfaction guaranteed!

"Kirk performed a thorough blower door test, walking me through every point that he later included in his report. With his report in hand, I have confidence in my understanding of the priority improvements that I can make to my sealing my home's envelope, which is precisely what I'd hired him for."

Garrett M on October 2023


Triple V Consultants & Associates

1915 Gregory Way
3.79(
14
)
Approved Pro

Triple V Consultants & Associates

1915 Gregory Way
3.79(
14
)
Approved Pro
16 local quotes requested
22 years of experience

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. To understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"I worked with Vasco (Vic) Valdez and he was very prompt, knowledgeable, and easy to work with. He met me at the job site the first day I made contact."

Brian C on October 2024

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. To understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"I worked with Vasco (Vic) Valdez and he was very prompt, knowledgeable, and easy to work with. He met me at the job site the first day I made contact."

Brian C on October 2024


THUNDERBIRD HVAC

5101 NE 10TH PLACE
5.00(
8
)

THUNDERBIRD HVAC

5101 NE 10TH PLACE
5.00(
8
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Thunderbird HVAC is a licensed and insured, family owned and operated HVAC company that provides installation and service for light commercial and residential heating and cooling systems. We pride ourselves on meeting the unique needs of each of our customers and providing exceptional customer service. Our team of experienced technicians is dedicated to ensuring that your HVAC system is running efficiently and effectively. Schedule your free estimate today. Ask about our services including dual fuel with google nest thermostat. Discounts include but not limited to (and you can combine!)Cash, Returning Customers, Referrals, Senior Citizen, and Veteran discounts!

"Awesome. I would definitely recommend them to anyone needing a new Heat pump or troubleshooting problems with their heat or ac. They are great. Thankyou so much"

Jason W on May 2025

Thunderbird HVAC is a licensed and insured, family owned and operated HVAC company that provides installation and service for light commercial and residential heating and cooling systems. We pride ourselves on meeting the unique needs of each of our customers and providing exceptional customer service. Our team of experienced technicians is dedicated to ensuring that your HVAC system is running efficiently and effectively. Schedule your free estimate today. Ask about our services including dual fuel with google nest thermostat. Discounts include but not limited to (and you can combine!)Cash, Returning Customers, Referrals, Senior Citizen, and Veteran discounts!

"Awesome. I would definitely recommend them to anyone needing a new Heat pump or troubleshooting problems with their heat or ac. They are great. Thankyou so much"

Jason W on May 2025


GreenInsulating.com

31811 Pacific Hwy S
No reviews yet

GreenInsulating.com

31811 Pacific Hwy S
No reviews yet
15 years of experience

Providing Significant Energy Savings and Emission Reductions in Existing Buildings. Energy Management Residential New Construction Attic and Crawl Space Insulation Commercial Mechanical Insulating Pipes Ducts Equipment Noise Control

Providing Significant Energy Savings and Emission Reductions in Existing Buildings. Energy Management Residential New Construction Attic and Crawl Space Insulation Commercial Mechanical Insulating Pipes Ducts Equipment Noise Control


Cloud9 Heating & Air

1002 Aurora Avenue North
5.00(
5
)

Cloud9 Heating & Air

1002 Aurora Avenue North
5.00(
5
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We are Puget Sound's top quality heating and cooling (HVAC) company. We bring attention to detail and professionalism to each and every job. At Cloud9, we strive to make every job as easy and seamless as possible for our customers. We offer installation services ranging from Heating, Air Conditioning, Ductless Heat Pumps and Water Heaters. We treat every home as if it were our own.

"We are very satisfied with the work that Mike and his team did. They were very professional, always on time, knowledgeable, and did a very clean job. They surveyed the site 2 times in great detail and completed the installation of our heat pump faster than expected."

Onur K on May 2023

We are Puget Sound's top quality heating and cooling (HVAC) company. We bring attention to detail and professionalism to each and every job. At Cloud9, we strive to make every job as easy and seamless as possible for our customers. We offer installation services ranging from Heating, Air Conditioning, Ductless Heat Pumps and Water Heaters. We treat every home as if it were our own.

"We are very satisfied with the work that Mike and his team did. They were very professional, always on time, knowledgeable, and did a very clean job. They surveyed the site 2 times in great detail and completed the installation of our heat pump faster than expected."

Onur K on May 2023

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Energy Efficiency Auditing questions, answered by experts

If you install LED bulbs, they will use much less energy than incandescent bulbs. LED light strips also use less power. Battery-operated puck lights use no electricity at all, but you will need to replace the batteries as needed. They are beneficial if your power goes out, too, as they will remain on as a light source. 

The best way to save money on home heating oil is to get large deliveries in the summer months when the prices are lowest. However, this method will only work if you have a separate storage tank or an unusually large primary tank. You can sometimes save money by opting into a delivery contract, as some companies offer set prices that they believe will sit at the average cost over the contract term. If the price of oil rises, you could enjoy some savings, but keep in mind that you might also pay a bit more if the price decreases.

Installing weather stripping or upgrading to insulated panels can improve efficiency.

Audits typically take 2-4 hours, depending on the property size and energy systems.

Yes, a dirty air filter can cause a higher electric bill. That’s because clogged filters make it harder for air to flow through your HVAC system, which forces it to work harder and use more energy. According to the U.S. Department of Energy, replacing dirty filters can save you between 5% and 15% in utility costs.

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The Mercer Island, WA homeowners’ guide to energy efficiency auditing services

From average costs to expert advice, get all the answers you need to get your job done.