Top-rated energy efficiency auditors.

Get matched with top energy efficiency auditors in Princeton, NJ

Enter your zip and get matched with up to 5 pros

Need a pro for your energy efficiency auditing project in Princeton, NJ?

Select your specific project to find the pro for you.

TRUSTED BY PRINCETON, NJ HOMEOWNERS

  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon20
    Verified energy efficiency auditing services reviews

Find Energy efficiency auditors in Princeton

Avatar for Climate Mechanics LLC

Climate Mechanics LLC

4.95(
44
)
Approved Pro

Climate Mechanics LLC

4.95(
44
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2010 years of experience

Climate Mechanics, LLC, is not happy with a finished HVAC project, until you are happy! We look forward to bringing our quality of work and excellence to your home. We always respond quickly to your requests, always price reasonably, and the work performed is of the highest caliber. Find out more about us at www.climatemechanics.com

"Excellent, very good. They are professional and reliable."

Lorenzo H on January 2022

Climate Mechanics, LLC, is not happy with a finished HVAC project, until you are happy! We look forward to bringing our quality of work and excellence to your home. We always respond quickly to your requests, always price reasonably, and the work performed is of the highest caliber. Find out more about us at www.climatemechanics.com

"Excellent, very good. They are professional and reliable."

Lorenzo H on January 2022


Avatar for Premier HVAC Services

Premier HVAC Services

4.67(
183
)
Approved Pro

Premier HVAC Services

4.67(
183
)
Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
2016 years of experience

When you need help with your heating, ventilation and air conditioning, you don’t want to hear that your technician is stuck in traffic. You won’t hear that excuse from us. We’re based in Brooklyn, at Sheepshead Bay road - in an office, not a phone drop or a postal address. It gives us quick access to many of our customers. But we also have workstations in Staten Island and Long Island. This way, our techs can quickly help you, whether you have an emergency or a routine call. They can rapidly fan out across Manhattan, Queens, Brooklyn and Long Island, ready to install mini-splits and portable AC units, clean chimneys, service residential and commercial HVAC systems, solve your radiant heat problem or get your furnace running more effectively. Our techs are experienced in all sorts of HVAC installation and repair, from heat pump systems and oil furnaces to air conditioner compressors and ac units. How we began As veterans of the industry for more than 10 years, we formed the company in Brooklyn in June 2016 with just one van and one technician. Fortunately, satisfied customers have rewarded us with many referrals and now we have seven vans and 15 people on our team, including office staff. We’re very proud and very grateful for our success. The team leader is Greg. He oversees all three locations and keeps us organized, making sure we respond to calls and we don’t leave until the customer is satisfied. Our techs are experienced, licensed and insured. We can help you, whether you want a new heat pump, a boiler repair, clean air ducts or a commercial HVAC overhaul.

"I called Premier HVAC Services for a routine check-up, and they never showed up. After waiting 3 hours, they rescheduled for a week later without any apologies. Completely unprofessional and unreliable. I wouldn’t trust them with my HVAC needs."

Heidi O on October 2025

When you need help with your heating, ventilation and air conditioning, you don’t want to hear that your technician is stuck in traffic. You won’t hear that excuse from us. We’re based in Brooklyn, at Sheepshead Bay road - in an office, not a phone drop or a postal address. It gives us quick access to many of our customers. But we also have workstations in Staten Island and Long Island. This way, our techs can quickly help you, whether you have an emergency or a routine call. They can rapidly fan out across Manhattan, Queens, Brooklyn and Long Island, ready to install mini-splits and portable AC units, clean chimneys, service residential and commercial HVAC systems, solve your radiant heat problem or get your furnace running more effectively. Our techs are experienced in all sorts of HVAC installation and repair, from heat pump systems and oil furnaces to air conditioner compressors and ac units. How we began As veterans of the industry for more than 10 years, we formed the company in Brooklyn in June 2016 with just one van and one technician. Fortunately, satisfied customers have rewarded us with many referrals and now we have seven vans and 15 people on our team, including office staff. We’re very proud and very grateful for our success. The team leader is Greg. He oversees all three locations and keeps us organized, making sure we respond to calls and we don’t leave until the customer is satisfied. Our techs are experienced, licensed and insured. We can help you, whether you want a new heat pump, a boiler repair, clean air ducts or a commercial HVAC overhaul.

"I called Premier HVAC Services for a routine check-up, and they never showed up. After waiting 3 hours, they rescheduled for a week later without any apologies. Completely unprofessional and unreliable. I wouldn’t trust them with my HVAC needs."

Heidi O on October 2025


Avatar for RJ Walsh Associates, Inc.

RJ Walsh Associates, Inc.

4.81(
87
)
Approved Pro

RJ Walsh Associates, Inc.

4.81(
87
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
2009 years of experience

RJ Walsh Associates, Inc., is a locally owned and operated business of 25 years. Specializing in Home Energy Audits, insulation, Air Sealing, and other energy efficient upgrades. If your home is drafty, has rooms or floors that you just can't seem to heat properly in the winter or cool in the summer, we can help. We identify the problems and propose reasonable, cost effective solutions. We participate in, and have an expert knowledge of programs to help you pay for these improvements. YOU DON'T HAVE TO LIVE LIKE THAT!

"Guys were great. Some sheetrock was broken, not their fault, old walls. Came back and fixed it quickly. Would recommend!"

Adam V on March 2025

RJ Walsh Associates, Inc., is a locally owned and operated business of 25 years. Specializing in Home Energy Audits, insulation, Air Sealing, and other energy efficient upgrades. If your home is drafty, has rooms or floors that you just can't seem to heat properly in the winter or cool in the summer, we can help. We identify the problems and propose reasonable, cost effective solutions. We participate in, and have an expert knowledge of programs to help you pay for these improvements. YOU DON'T HAVE TO LIVE LIKE THAT!

"Guys were great. Some sheetrock was broken, not their fault, old walls. Came back and fixed it quickly. Would recommend!"

Adam V on March 2025


Avatar for Ciel Power, LLC

Ciel Power, LLC

4.55(
11
)
Approved Pro

Ciel Power, LLC

4.55(
11
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2010 years of experience

Give your home the upgrades it needs. Get up to $5,000 in cash-back rebates and up to $15,000 in incentive financing to install today's energy-efficient products in your home. As a participating provider of the PSE&G, JCP&L, & NJNG Home Performance with ENERGY STAR Programs, Ciel customers enjoy cash-back and financing incentives for installing upgrades, including attic insulation, exterior wall insulation, heating, cooling, and hot water systems. There are no income requirements, and owners of single and multi-family homes are eligible. Ciel streamlines the customer experience with easy-to-understand reports, experienced consultants, and skilled rebate specialists to speed up your participation without losing track of the details. Schedule a home energy assessment with New Jersey's premier provider for just $99.

"Good communication, easy to work with."

Ramon H on September 2022

Give your home the upgrades it needs. Get up to $5,000 in cash-back rebates and up to $15,000 in incentive financing to install today's energy-efficient products in your home. As a participating provider of the PSE&G, JCP&L, & NJNG Home Performance with ENERGY STAR Programs, Ciel customers enjoy cash-back and financing incentives for installing upgrades, including attic insulation, exterior wall insulation, heating, cooling, and hot water systems. There are no income requirements, and owners of single and multi-family homes are eligible. Ciel streamlines the customer experience with easy-to-understand reports, experienced consultants, and skilled rebate specialists to speed up your participation without losing track of the details. Schedule a home energy assessment with New Jersey's premier provider for just $99.

"Good communication, easy to work with."

Ramon H on September 2022


Old Skool HVAC,LLC

4.70(
10
)
Approved Pro

Old Skool HVAC,LLC

4.70(
10
)
Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
1982 years of experience

I service ALL makes and models of heating equipment. Oil, gas/propane, heat pumps, water heaters, boilers (hot water and steam) and refrigeration equipment. I do both residential and commercial work. All work comes with warranties. Licensed and insured. PA098480 Oil furnace/boiler cleaning $159.00, Gas furnace clean/tune-up $ 69.00 Heat pump clean/tune-up $ 79.00 Military, Senior, Public service(Fire/Police) Discounts NO ADDED OVERTIME OR WEEKEND RATES....EVER!!! Same price any time. Any day. Including holidays. 30 years' experience !!!! FREE estimates on new equipment replacements FREE 2nd opinions 302-669-9167

"They were professional, and they did a very well job."

Richard M on June 2022

I service ALL makes and models of heating equipment. Oil, gas/propane, heat pumps, water heaters, boilers (hot water and steam) and refrigeration equipment. I do both residential and commercial work. All work comes with warranties. Licensed and insured. PA098480 Oil furnace/boiler cleaning $159.00, Gas furnace clean/tune-up $ 69.00 Heat pump clean/tune-up $ 79.00 Military, Senior, Public service(Fire/Police) Discounts NO ADDED OVERTIME OR WEEKEND RATES....EVER!!! Same price any time. Any day. Including holidays. 30 years' experience !!!! FREE estimates on new equipment replacements FREE 2nd opinions 302-669-9167

"They were professional, and they did a very well job."

Richard M on June 2022


Avatar for NJ Air Quality

NJ Air Quality

4.84(
296
)

NJ Air Quality

4.84(
296
)
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers

We welcome Commercial & Residential accounts and serve our customers 7 days per week including evenings and weekends. Not only do we have the experience and training necessary to get the job done right the first time, we also stake our name and reputation on having the highest level of respect for your home or place of business. This Company is not a franchise.

"They did a great job cleaning the ducts. Made a great impression when they made recommendations regarding cleaning the ducts."

dwayne p on April 2019

We welcome Commercial & Residential accounts and serve our customers 7 days per week including evenings and weekends. Not only do we have the experience and training necessary to get the job done right the first time, we also stake our name and reputation on having the highest level of respect for your home or place of business. This Company is not a franchise.

"They did a great job cleaning the ducts. Made a great impression when they made recommendations regarding cleaning the ducts."

dwayne p on April 2019


ECI Comfort

4.91(
69
)

ECI Comfort

4.91(
69
)
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers

For 20 years, ECI Comfort has been designing and installing high-efficiency HVAC systems throughout Bucks County and the surrounding areas. Through our work with Unico and Mitsubishi products, we are able to install high-performance, high-velocity systems in a variety of homes, specializing in those that do not or cannot encompass conventional ductwork. We also service and replace all makes and models of HVAC equipment, deliver home heating oil, install generators and perform energy assessments. Additional contact name - Chase Musser. Additional email - [email protected].

"ECI Comfort replaced our heat pump, which included the outside unit, inside air handler, and thermostat/control, in April of 2020. We paid competitive pricing. Our Trane system is still working like new! During our first regular servicing of the unit, the technician, Selinda Killing, found our Air Scrubber (a device to clean the air as it passes through the Air Handler) not working. That item was added to the Air Handler, free of charge, during installation. Today, the Ultra-Violet Bulb, which is the piece that does the actual cleaning in that Air Scrubber, was replaced by technician Mike Slawecki. That is working well, again! Ms Killing, Mr Slawecki, as well as the entire installation crew, in 2020, were totally professional and polite. Our Air Handler is in our attic, with not-easy-access in the master bedroom walk-in closet. The entry to the attic is 18" X 48", and everyone has handled that very small area without issue. Removing the replaced components, as well as, bringing in the new components, through that opening, was not easy. My wife and I have been quite pleased with all ECI has done for us. ECI Comfort is a first-class operation, and we would recommend them for all of your HVAC needs!"

Leigh N on January 2022

For 20 years, ECI Comfort has been designing and installing high-efficiency HVAC systems throughout Bucks County and the surrounding areas. Through our work with Unico and Mitsubishi products, we are able to install high-performance, high-velocity systems in a variety of homes, specializing in those that do not or cannot encompass conventional ductwork. We also service and replace all makes and models of HVAC equipment, deliver home heating oil, install generators and perform energy assessments. Additional contact name - Chase Musser. Additional email - [email protected].

"ECI Comfort replaced our heat pump, which included the outside unit, inside air handler, and thermostat/control, in April of 2020. We paid competitive pricing. Our Trane system is still working like new! During our first regular servicing of the unit, the technician, Selinda Killing, found our Air Scrubber (a device to clean the air as it passes through the Air Handler) not working. That item was added to the Air Handler, free of charge, during installation. Today, the Ultra-Violet Bulb, which is the piece that does the actual cleaning in that Air Scrubber, was replaced by technician Mike Slawecki. That is working well, again! Ms Killing, Mr Slawecki, as well as the entire installation crew, in 2020, were totally professional and polite. Our Air Handler is in our attic, with not-easy-access in the master bedroom walk-in closet. The entry to the attic is 18" X 48", and everyone has handled that very small area without issue. Removing the replaced components, as well as, bringing in the new components, through that opening, was not easy. My wife and I have been quite pleased with all ECI has done for us. ECI Comfort is a first-class operation, and we would recommend them for all of your HVAC needs!"

Leigh N on January 2022


Avatar for All Seasons Comfort Control LLC

All Seasons Comfort Control LLC

4.76(
102
)

All Seasons Comfort Control LLC

4.76(
102
)
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers

Our Experienced HVAC Technicians Always Put Our Customers First A family owned and operated business, All Seasons Comfort Control started in 2002 when Jeff Long and his son Chris joined forces to share their knowledge, skill, and expertise. All Seasons Comfort Control was founded on the concept that as a family business, we would treat our customers as family and their best interest will always comes first. We decided then that we will only offer the highest level of quality products and services. We wanted to be different- we wanted to be the company you can trust for honest answers, fair pricing, quality workmanship, and friendly service. We are proud to say that these core principles have not changed. Based in Bucks County, Pennsylvania, Jeff, Chris and the rest of the All Seasons HVAC team work hard to provide the best heating, air conditioning, plumbing, and gas fireplace service the region has to offer. As a result of our high standards and customer-oriented efforts, All Seasons proudly has a 99% Satisfaction Rate which has led to continually being awarded Customer Care™ Dealer status by American Standard, a distinction given to only the very best heating and air conditioning professionals in the industry. In recognition of our dedication to customer service we have also been awarded the Angie’s List Super Service Award, the “Best of” award, the “Top Rated” award, and the “Elite Service” award by Home Advisor as well as voted the best HVAC Contractor in Bucks County multiple years in a row by the “Bucks Happening List”. We are very proud to have received these awards and others and dedicate ourselves everyday to continue to offer unmatched customer service. SERVICE AREAS: Bucks County, PA Portions of Montgomery County, PA Portions of North East Philadelphia, PA Portions of Mercer County, NJ

"Excellent service"

Mariusz J on April 2022

Our Experienced HVAC Technicians Always Put Our Customers First A family owned and operated business, All Seasons Comfort Control started in 2002 when Jeff Long and his son Chris joined forces to share their knowledge, skill, and expertise. All Seasons Comfort Control was founded on the concept that as a family business, we would treat our customers as family and their best interest will always comes first. We decided then that we will only offer the highest level of quality products and services. We wanted to be different- we wanted to be the company you can trust for honest answers, fair pricing, quality workmanship, and friendly service. We are proud to say that these core principles have not changed. Based in Bucks County, Pennsylvania, Jeff, Chris and the rest of the All Seasons HVAC team work hard to provide the best heating, air conditioning, plumbing, and gas fireplace service the region has to offer. As a result of our high standards and customer-oriented efforts, All Seasons proudly has a 99% Satisfaction Rate which has led to continually being awarded Customer Care™ Dealer status by American Standard, a distinction given to only the very best heating and air conditioning professionals in the industry. In recognition of our dedication to customer service we have also been awarded the Angie’s List Super Service Award, the “Best of” award, the “Top Rated” award, and the “Elite Service” award by Home Advisor as well as voted the best HVAC Contractor in Bucks County multiple years in a row by the “Bucks Happening List”. We are very proud to have received these awards and others and dedicate ourselves everyday to continue to offer unmatched customer service. SERVICE AREAS: Bucks County, PA Portions of Montgomery County, PA Portions of North East Philadelphia, PA Portions of Mercer County, NJ

"Excellent service"

Mariusz J on April 2022


Avatar for Sila Heating, Cooling, Plumbing and Electrical

Sila Heating, Cooling, Plumbing and Electrical

4.57(
1,697
)

Sila Heating, Cooling, Plumbing and Electrical

4.57(
1,697
)
Customers say: Super punctual
1989 years of experience

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"So far, the system has been working really well. Everyone involved in my project was professional and personable. We had a little tweaking to do on the finish work, but all of my issues were fixed promptly. I would recommend Sila."

Stacy S on October 2024

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"So far, the system has been working really well. Everyone involved in my project was professional and personable. We had a little tweaking to do on the finish work, but all of my issues were fixed promptly. I would recommend Sila."

Stacy S on October 2024


Avatar for NP Energy Inc.

NP Energy Inc.

4.93(
30
)

NP Energy Inc.

4.93(
30
)
Customers say: Super punctual
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

We specialize in all your insulation needs! Closed Cell Spray Foam, Injection Foam, Blown In Insulation, Closed cavity dense packing and sound proofing, Air Sealing, Batting Insulation and Removal of Existing Insulation. We are family owned and operated and have over 25 years of experience! We have the highest standards in the industry! Customer satisfaction guaranteed!

"Craig came out to provide an estimate within a week of contact. He Surveyed the attic and gave recommendations on other considerations eg sealing recessed lighting. He walked me through the process and science. I accepted the quote and contractors were on the scene within 3 days! Completed the job, despite high temperatures. Cleaned up well afterwards. Really notice the difference already. Great job!"

Ruth H on July 2019

We specialize in all your insulation needs! Closed Cell Spray Foam, Injection Foam, Blown In Insulation, Closed cavity dense packing and sound proofing, Air Sealing, Batting Insulation and Removal of Existing Insulation. We are family owned and operated and have over 25 years of experience! We have the highest standards in the industry! Customer satisfaction guaranteed!

"Craig came out to provide an estimate within a week of contact. He Surveyed the attic and gave recommendations on other considerations eg sealing recessed lighting. He walked me through the process and science. I accepted the quote and contractors were on the scene within 3 days! Completed the job, despite high temperatures. Cleaned up well afterwards. Really notice the difference already. Great job!"

Ruth H on July 2019

...
Showing 1-10 of 97
Energy Efficiency Auditing questions, answered by experts

While many states require all new construction to undergo blower door tests, it’s not a requirement for existing homes. But in both cases, a blower test helps confirm that the contractor has sealed the exterior, that the type of ductwork installed is functioning properly, and that your home is as efficient as possible.

Costs depend on the property size, audit complexity, and whether additional testing (e.g., blower door) is included.

Depending on property size and audit scope, costs range from $200 to $600.

Window AC units use a fair amount of electricity during use, but the usage pales in comparison to central units. As a matter of fact, window units use around a third of the amount of energy as a central AC. On average, a window air conditioner costs between $15 and $40 per month to run, though this depends on a number of external factors.

Keep the unit full but not overloaded, ensure door seals are tight, set correct temperatures, and avoid frequent door openings. Position the appliance away from heat sources for optimal performance.

The Princeton, NJ homeowners’ guide to energy efficiency auditing services

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

What do you need done? We’ll find top pros.
  • 🌱 "Mow a small front yard"
  • 🛠 "Fix a leaking pipe under the sink"
  • 🏠 "Repair shingles on an asphalt roof"