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Verified Reviews for Energy Efficiency Auditing pros in South Windham, CT
*The Angi rating for Energy Efficiency Auditing companies in South Windham, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Energy Efficiency Auditing needs.
*The HomeAdvisor rating for Energy Efficiency Auditing companies in South Windham, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Energy Efficiency Auditing needs.
Last update on December 13, 2025
Find Energy efficiency auditors in South Windham

Omni Mechanical Services, LLC
Omni Mechanical Services, LLC
We have over 20 years of experience in the HVAC industry. Here at Omni Mechanical Services, LLC, we pride ourselves on reliability, great communication, integrity and quality work. We are experts in our trade and will do our best to keep you as educated as we can throughout your particular task or project. Let us take care of all your home's HVAC needs, and find out for yourself why we have 4.75 stars on homeadvisor.com! Call us today at (860) 422-4314!
"Good reliable company who I’ve dealt with for quite some time. Reasonably priced I’ve had the annual contract with them for a couple of years. I just had my furnace serviced for the winter. Christian did the service. Very pleasant young man knowledgeable "
Brian W on November 2025
We have over 20 years of experience in the HVAC industry. Here at Omni Mechanical Services, LLC, we pride ourselves on reliability, great communication, integrity and quality work. We are experts in our trade and will do our best to keep you as educated as we can throughout your particular task or project. Let us take care of all your home's HVAC needs, and find out for yourself why we have 4.75 stars on homeadvisor.com! Call us today at (860) 422-4314!
"Good reliable company who I’ve dealt with for quite some time. Reasonably priced I’ve had the annual contract with them for a couple of years. I just had my furnace serviced for the winter. Christian did the service. Very pleasant young man knowledgeable "
Brian W on November 2025
Rachel Solar Specialist
Rachel Solar Specialist
We pride our company on reliability, great communication, integrity, and quality work. We believe in giving our absolute best in all of our projects, no matter how big or small. You will find us to be competitively priced, with close attention to the details of each and every project. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business, so please ask us for references.
We pride our company on reliability, great communication, integrity, and quality work. We believe in giving our absolute best in all of our projects, no matter how big or small. You will find us to be competitively priced, with close attention to the details of each and every project. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business, so please ask us for references.

Nutmeg Mechanical Services Inc
Nutmeg Mechanical Services Inc
Nutmeg Mechanical Services, Inc. has been servicing and installing heating and air conditioning in Connecticut since 1982. We combine extensive technical training with years of on-the-job experience to give you the finest and best designed installations. We service all brands of heating and air conditioning equipment and provide 24 hour emergency service 7 days a week. Our installations have been as diverse as private homes, shopping centers, banks, churches, industrial plants, commercial establishments and offices. Although our company offers the finest and most advanced equipment the industry has to offer, it's the people who really make the difference. Our people share a commitment to customer satisfaction, quality and craftsmanship. That's why our installations always work and look the way our customers want them to. Then we back it up with one of the best service organizations in the industry.
"It was Saturday afternoon. When I saw water spreading on my basement floor, I called Nutmeg. Within 15 minutes, I got a call back from a tech. He said he could be here within 20 minutes, and he DID. He cleared the drain from the evaporation pan. All is well, and I was satisfied with the weekend charge. Super service. Have used Nutmeg in the past for my HVAC work, and will always use them in the future."
Douglas W on September 2020
Nutmeg Mechanical Services, Inc. has been servicing and installing heating and air conditioning in Connecticut since 1982. We combine extensive technical training with years of on-the-job experience to give you the finest and best designed installations. We service all brands of heating and air conditioning equipment and provide 24 hour emergency service 7 days a week. Our installations have been as diverse as private homes, shopping centers, banks, churches, industrial plants, commercial establishments and offices. Although our company offers the finest and most advanced equipment the industry has to offer, it's the people who really make the difference. Our people share a commitment to customer satisfaction, quality and craftsmanship. That's why our installations always work and look the way our customers want them to. Then we back it up with one of the best service organizations in the industry.
"It was Saturday afternoon. When I saw water spreading on my basement floor, I called Nutmeg. Within 15 minutes, I got a call back from a tech. He said he could be here within 20 minutes, and he DID. He cleared the drain from the evaporation pan. All is well, and I was satisfied with the weekend charge. Super service. Have used Nutmeg in the past for my HVAC work, and will always use them in the future."
Douglas W on September 2020

Eco Energy Guard LLC
Eco Energy Guard LLC
Established in 2008. We have been a leader in a greener approach towards home energy. We treat your home like our home. Clean and conscientious work. Eco Energy Guard is an approved insulation rebate contractor for Connecticut. We can help guide you with additional savings through the HES rebate program. We carry a variety of insulation materials based on each home and customers requirements of how that space is utilized for storage or AC systems. By air sealing, positive air ventilation and insulations, we can create a user friendly environment if required. We insulate crawlspaces, duct work, basements, foam seal rim joists, full energy inspections, Air purifiers and more. Fully licensed, insured and service residential properties
"Very Well. William Brown and his crew made great suggestions. Very timely communication. He suggested getting an energy audit which saved me a lot of money."
Gary N on October 2020
Established in 2008. We have been a leader in a greener approach towards home energy. We treat your home like our home. Clean and conscientious work. Eco Energy Guard is an approved insulation rebate contractor for Connecticut. We can help guide you with additional savings through the HES rebate program. We carry a variety of insulation materials based on each home and customers requirements of how that space is utilized for storage or AC systems. By air sealing, positive air ventilation and insulations, we can create a user friendly environment if required. We insulate crawlspaces, duct work, basements, foam seal rim joists, full energy inspections, Air purifiers and more. Fully licensed, insured and service residential properties
"Very Well. William Brown and his crew made great suggestions. Very timely communication. He suggested getting an energy audit which saved me a lot of money."
Gary N on October 2020

NEW ENGLAND SMART ENERGY
NEW ENGLAND SMART ENERGY
Lower your energy bills by having your home assessed for energy efficiency, provided by the Connecticut Energy Efficiency Fund. In addition, gain access to rebates and financing options for new insulation, windows, heating/cooling systems, appliances, and state incentives!
Lower your energy bills by having your home assessed for energy efficiency, provided by the Connecticut Energy Efficiency Fund. In addition, gain access to rebates and financing options for new insulation, windows, heating/cooling systems, appliances, and state incentives!

EnergyPRZ DBA the Energy Store
EnergyPRZ DBA the Energy Store
The-Energystore/EnergyPRZ is a GOLD Star Home Performance Contractor that is BPI accredited residential energy efficiency firm. We look at your house in a holistic and complete system. As a provider of the official Department of Energy Home Energy Score, we professionally analyze your home, detail improvements that can be made and back it up with solid data and real solutions. The path to saving comfortably is found at our full compliment of savings solutions.
The-Energystore/EnergyPRZ is a GOLD Star Home Performance Contractor that is BPI accredited residential energy efficiency firm. We look at your house in a holistic and complete system. As a provider of the official Department of Energy Home Energy Score, we professionally analyze your home, detail improvements that can be made and back it up with solid data and real solutions. The path to saving comfortably is found at our full compliment of savings solutions.

Dr. Energy Saver Connecticut
Dr. Energy Saver Connecticut
At Dr. Energy Saver of Connecticut our goal is simple! We provide a broad range of insulation and air sealing packages that are customized to meet your specific needs and budget. We're proud to be your fully trained and trusted home energy specialist in Connecticut, providing our professional home energy services to improve the condition of your home. When it comes to making a house more comfortable, there is no one-size-fits-all solution. This isn't just rolling insulation into your attic. This is a whole-house approach to making your home more comfortable and energy efficient. Whether helping your air-conditioning system keep up with the heat in the summer, or making cold floors or drafty rooms warmer in the winter, we can solve it!
"We contracted for the full service and we really got it, could not be more pleased. Foreman and crew were prompt, efficient, knowledgeable and neat as possible for what is major work and could have been very messy. Their technology and application of that technology is absolutely first rate. Their systems will make our home comfortable and efficient for the long term! Excellent value for money."
Bruce R T on June 2023
At Dr. Energy Saver of Connecticut our goal is simple! We provide a broad range of insulation and air sealing packages that are customized to meet your specific needs and budget. We're proud to be your fully trained and trusted home energy specialist in Connecticut, providing our professional home energy services to improve the condition of your home. When it comes to making a house more comfortable, there is no one-size-fits-all solution. This isn't just rolling insulation into your attic. This is a whole-house approach to making your home more comfortable and energy efficient. Whether helping your air-conditioning system keep up with the heat in the summer, or making cold floors or drafty rooms warmer in the winter, we can solve it!
"We contracted for the full service and we really got it, could not be more pleased. Foreman and crew were prompt, efficient, knowledgeable and neat as possible for what is major work and could have been very messy. Their technology and application of that technology is absolutely first rate. Their systems will make our home comfortable and efficient for the long term! Excellent value for money."
Bruce R T on June 2023

Yankee Home Improvement Inc
Yankee Home Improvement Inc
Born from the belief that improving your home should be a stress free and enjoyable experience, yankee home was established. Co-founders nancy and ger ronan themselves victims of an unscrupulous contractor many years ago set out to create a home improvement company that would become the most referred contractor in new england. Committed to the philosophy of “customers for life” they have become the preferred contractor for most major warehouse clubs. Committed to giving back to the community they are proud of their affiliations with blue star equiculture, habitat for humanity, safe passage,homes for the troops and extreme home makeover. According to the trade publication replacement contractor magazine, yankee home is now the 102nd largest home improvement company in the country, offering insulated siding, replacement windows, bath liners, roofing, sunrooms, attic energy barrier, insulation and gutters. With a company motto of “no worries” we pledge to provide you with an experience that is enjoyable, informative and fun while guaranteeing that you’ll never feel like you made a mistake putting your trust in us. Yankee home is fully licensed & accredited in ma, vt, nh, ri and ct. Specialize in earth-friendly windows, siding, roofing, radiant insulation & gutter protection systems. Call 877 801-5886 today Additional Contact name - Ger Ronan. Additional Email - [email protected].
Born from the belief that improving your home should be a stress free and enjoyable experience, yankee home was established. Co-founders nancy and ger ronan themselves victims of an unscrupulous contractor many years ago set out to create a home improvement company that would become the most referred contractor in new england. Committed to the philosophy of “customers for life” they have become the preferred contractor for most major warehouse clubs. Committed to giving back to the community they are proud of their affiliations with blue star equiculture, habitat for humanity, safe passage,homes for the troops and extreme home makeover. According to the trade publication replacement contractor magazine, yankee home is now the 102nd largest home improvement company in the country, offering insulated siding, replacement windows, bath liners, roofing, sunrooms, attic energy barrier, insulation and gutters. With a company motto of “no worries” we pledge to provide you with an experience that is enjoyable, informative and fun while guaranteeing that you’ll never feel like you made a mistake putting your trust in us. Yankee home is fully licensed & accredited in ma, vt, nh, ri and ct. Specialize in earth-friendly windows, siding, roofing, radiant insulation & gutter protection systems. Call 877 801-5886 today Additional Contact name - Ger Ronan. Additional Email - [email protected].
Energy Efficiencies Solutions LLC
Energy Efficiencies Solutions LLC
Energy Efficiencies Solutions (EES) is a Connecticut based full service Energy Conservation Company, offering comprehensive solutions to conserving energy including; home energy assessments, energy usage reports, air sealing, insulation, windows, solar, heating and cooling systems, renewable energy options, energy education, and return on investment coaching for retrofits and energy upgrades. We are number one in the nation for customer service and market leadership. We offer rebates through CL&P and UI. We offer customer rewards for referrals. Since inception we have remained in the top one percent of CT based Home Energy Solutions vendors leading the way in MMBTU (energy) reduction statewide. We have been nominated for the 2013 DOE National Award in 4 out of 4 categories. We are invested in environmental conservation, youth education, and workforce development. Through collaborative efforts with major utilities, workforce boards, community based organizations, nonprofits, and businesses; we are driving social, economic, and environmental change across the nation. Conserving energy offers tremendous opportunities for community building, environmental conservation, and green job creation. Learn more on our awards page and our Green Eco Warriors page, and through our Save Energy Save Dinero™ program. www.EESgoGreen.com
Energy Efficiencies Solutions (EES) is a Connecticut based full service Energy Conservation Company, offering comprehensive solutions to conserving energy including; home energy assessments, energy usage reports, air sealing, insulation, windows, solar, heating and cooling systems, renewable energy options, energy education, and return on investment coaching for retrofits and energy upgrades. We are number one in the nation for customer service and market leadership. We offer rebates through CL&P and UI. We offer customer rewards for referrals. Since inception we have remained in the top one percent of CT based Home Energy Solutions vendors leading the way in MMBTU (energy) reduction statewide. We have been nominated for the 2013 DOE National Award in 4 out of 4 categories. We are invested in environmental conservation, youth education, and workforce development. Through collaborative efforts with major utilities, workforce boards, community based organizations, nonprofits, and businesses; we are driving social, economic, and environmental change across the nation. Conserving energy offers tremendous opportunities for community building, environmental conservation, and green job creation. Learn more on our awards page and our Green Eco Warriors page, and through our Save Energy Save Dinero™ program. www.EESgoGreen.com
Mainline Heating and Supply
Mainline Heating and Supply
Mainline is a comprehensive retailer, distributor and service provider for premium quality Pellet, Gas inserts and fireplaces as well as Wood Stoves, Inserts, Fireplaces, Outdoor Wood Furnaces, Central Heating Systems. Renewable Electricity Supply and associated parts and accessories.
Mainline is a comprehensive retailer, distributor and service provider for premium quality Pellet, Gas inserts and fireplaces as well as Wood Stoves, Inserts, Fireplaces, Outdoor Wood Furnaces, Central Heating Systems. Renewable Electricity Supply and associated parts and accessories.
FAQs for energy efficiency auditing projects in South Windham, CT
An energy audit costs about $420 on average, ranging from $100 to $2,250, depending on the size of your home, property, location, and the tests the auditor needs to perform. Keep in mind that the 2022 Inflation Reduction Act’s Energy Efficient Home Improvement credit covers up to $150 of home energy audit costs. Common energy audit tests include:
Blower door test: $350
Duct testing: $100
HERS test: $375
HERS certification: $200
Infrared imaging: $200
The difference between an energy auditor and a home inspector is primarily in the purpose of the inspection. The energy auditor conducts tests in your home to determine the energy efficiency levels in areas like windows, insulation, and doorways. The auditor then makes recommendations for ways to improve a home’s energy efficiency.
A home inspector examines various structures of your home to determine that everything is up to code and gauge the condition of features like the roof, foundation, HVAC, and electrical. The home inspector reports on the overall home and makes repair recommendations.
Typically, a local home energy auditor is responsible for performing energy audits. A home energy auditor will conduct one of three energy audits designed by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) to determine the energy efficiency of your home. The auditor often provides analysis that can help guide changes and improvements to your home for better energy efficiency, giving recommendations as necessary.
The three levels of home energy audits include:
Level 1: Review of your energy bills and home for signs of energy inefficiency and areas for improvement. The average cost range is $0.08 to $0.12 per square foot.
Level 2: A level 2 ASHRAE energy audit costs $0.12 and $0.35 per square foot. In-depth analysis of your energy usage and provides a report of cost-saving changes.
Level 3: Comprehensive analysis and detailed recommendations for ways to improve your home’s energy efficiency. A level 3 audit costs about $0.36 to $0.50 per square foot.
To find a reputable energy auditor, find a local company that offers energy audit services. Research the company’s reviews, methods, and certifications to find a reliable professional in your area. The most reputable energy audit companies are HEP-certified by the Building Performance Institute (BPI). Be sure to check our state licensing tool to review the local energy auditor guidelines to ensure you’re hiring a certified professional.
The South Windham, CT homeowners’ guide to energy efficiency auditing services
From average costs to expert advice, get all the answers you need to get your job done.
•Discover the average home energy audit cost, what impacts pricing, and how to save money on your audit. Get transparent, expert-backed cost info for homeowners.

A home energy audit is a detailed write-up of how to lower your utility bills and increase your comfort level. Find out if they’re worth the cost.
•Get a detailed breakdown of thermal imaging home inspection costs, including average prices, cost factors, and tips to help homeowners budget.

Home energy audits can identify ways to make your home more energy-efficient. Learn whether an energy audit is a good investment for your home.
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