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Verified Reviews for Energy Efficiency Auditing pros in Windham, NH

*The Angi rating for Energy Efficiency Auditing companies in Windham, NH 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 Windham, NH 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 07, 2025

Find Energy efficiency auditors in Windham

Avatar for Insul-Kings

Insul-Kings

4.25(
36
)
•Approved Pro

Insul-Kings

4.25(
36
)
•Approved Pro
Customers say: Terrific value
1999 years of experience
Free onsite estimate

Insul Kings is a fully licensed and insured weatherization contractor specializing in weatherization work (adding insulation to home), energy audits, whole house air-sealing, and the installation of various types of insulation for both commercial and residential projects. We are a proud partner of Mass Save & NH Save and are rated in the top 5% of their contractor scoring.

"Insul-Kings is wonderful to work with. They called in the morning to narrow the arrival time, which is very considerate. Nate and his crew arrived on time and CRANKED like a well oiled machine. I have a 4' crawl space. You can barely crouch. No problem! That's why God invented knee pads. They foamed and installed the insulation like it was their own home. It was a work of art. and came out better than I imagined. They patiently indulged my "old man" inquisitiveness. The crew represented Insul-Kings very well. I highly recommend them. This was done through the Mass Save program. So the $2100 job only cost me about $500.00"

john r on December 2025

Insul Kings is a fully licensed and insured weatherization contractor specializing in weatherization work (adding insulation to home), energy audits, whole house air-sealing, and the installation of various types of insulation for both commercial and residential projects. We are a proud partner of Mass Save & NH Save and are rated in the top 5% of their contractor scoring.

"Insul-Kings is wonderful to work with. They called in the morning to narrow the arrival time, which is very considerate. Nate and his crew arrived on time and CRANKED like a well oiled machine. I have a 4' crawl space. You can barely crouch. No problem! That's why God invented knee pads. They foamed and installed the insulation like it was their own home. It was a work of art. and came out better than I imagined. They patiently indulged my "old man" inquisitiveness. The crew represented Insul-Kings very well. I highly recommend them. This was done through the Mass Save program. So the $2100 job only cost me about $500.00"

john r on December 2025

Seacoast Inspections LLC

4.93(
71
)

Seacoast Inspections LLC

4.93(
71
)
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers

Licensed Home Inspector #698 MA, #107 NH ASHI Certified Inspector #247162, Certified Level II Building Science Thermographer #31162, EDR Certified, Certified WDI Registry Inspector #90113. No Fee guarantee!

Licensed Home Inspector #698 MA, #107 NH ASHI Certified Inspector #247162, Certified Level II Building Science Thermographer #31162, EDR Certified, Certified WDI Registry Inspector #90113. No Fee guarantee!

Avatar for CAL'S AIR CONDITIONING AND HEATING

CAL'S AIR CONDITIONING AND HEATING

4.90(
67
)

CAL'S AIR CONDITIONING AND HEATING

4.90(
67
)
Customers say: Super punctual
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers

Cal's Air Conditioning and Heating. Sole Proprietership, in business since 1994, locally owned and operated, owner Ernest Calderone. Billing-paid upon completion of service or installation.

"Very pleased with the Mitsubishi ductless a/c system Cal's installed. Prompt and professional. Highly recommended."

kim k on August 2018

Cal's Air Conditioning and Heating. Sole Proprietership, in business since 1994, locally owned and operated, owner Ernest Calderone. Billing-paid upon completion of service or installation.

"Very pleased with the Mitsubishi ductless a/c system Cal's installed. Prompt and professional. Highly recommended."

kim k on August 2018

Avatar for New England Clean Energy

New England Clean Energy

5.00(
21
)

New England Clean Energy

5.00(
21
)
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

New England Clean Energy Inc. designs, installs and services solar electric, battery systems, and provides solar-related services and repair. The company has installed more than 1,200 solar energy systems for homeowners, businesses and nonprofit organizations in New Hampshire, Rhode Island and Massachusetts. Founded in 2006, New England Clean Energy has more positive reviews on SolarReviews.com than any installer in the northeast. Headquartered in Hudson, Mass., the company also has an office in Providence, R.I. and will soon be opening an office in New Hampshire. To see a searchable picture library of some of our work visit https://newenglandcleanenergy.com/residential/photos/ You can search by type of installation, roof type, town or state.

"We consider ourselves very lucky for having chosen New England Clean Energy as our solar installer. From the beginning to the end of the project, NECE was responsive, punctual, helpful and very focused on giving us the best - we always felt they put us, their customer, first. We are very happy customers, secure in the knowledge that no matter what issues may come up with our system, NECE is a phone call or an email away, with courteous, prompt answers. We wholeheartedly recommend them."

Teodros G on January 2019

New England Clean Energy Inc. designs, installs and services solar electric, battery systems, and provides solar-related services and repair. The company has installed more than 1,200 solar energy systems for homeowners, businesses and nonprofit organizations in New Hampshire, Rhode Island and Massachusetts. Founded in 2006, New England Clean Energy has more positive reviews on SolarReviews.com than any installer in the northeast. Headquartered in Hudson, Mass., the company also has an office in Providence, R.I. and will soon be opening an office in New Hampshire. To see a searchable picture library of some of our work visit https://newenglandcleanenergy.com/residential/photos/ You can search by type of installation, roof type, town or state.

"We consider ourselves very lucky for having chosen New England Clean Energy as our solar installer. From the beginning to the end of the project, NECE was responsive, punctual, helpful and very focused on giving us the best - we always felt they put us, their customer, first. We are very happy customers, secure in the knowledge that no matter what issues may come up with our system, NECE is a phone call or an email away, with courteous, prompt answers. We wholeheartedly recommend them."

Teodros G on January 2019

Avatar for A&E AIR CONDITIONING & REFRIGERATION

A&E AIR CONDITIONING & REFRIGERATION

5.00(
12
)

A&E AIR CONDITIONING & REFRIGERATION

5.00(
12
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Residential Commercial Installs Refrigeration A/C Installation Ductless A/C services A/C repairs Heater repair Thermostat repair

"Installation was quick and did not encounter any issues. Mr. D’Entremont was friendly and professional. I would definitely call him again for any HVAC services I need."

Sue R on September 2022

Residential Commercial Installs Refrigeration A/C Installation Ductless A/C services A/C repairs Heater repair Thermostat repair

"Installation was quick and did not encounter any issues. Mr. D’Entremont was friendly and professional. I would definitely call him again for any HVAC services I need."

Sue R on September 2022

Avatar for EcoLifeSolar By SunPower

EcoLifeSolar By SunPower

5.00(
10
)

EcoLifeSolar By SunPower

5.00(
10
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Solar Panels for residential homes. We help Homeowners save significant money on electric bills and control their energy costs while saving the planet. Serving Massachusetts homes; we will read your bill and let you know immediately how much we can save you monthly. No Money Down! $250 Visa Gift Card upon signing!

"Rob was extremely helpful and personable. Answered my questions that I had in a way that made the process easy to understand."

Joshua C on March 2023

Solar Panels for residential homes. We help Homeowners save significant money on electric bills and control their energy costs while saving the planet. Serving Massachusetts homes; we will read your bill and let you know immediately how much we can save you monthly. No Money Down! $250 Visa Gift Card upon signing!

"Rob was extremely helpful and personable. Answered my questions that I had in a way that made the process easy to understand."

Joshua C on March 2023

Avatar for Ideal Comfort HVAC

Ideal Comfort HVAC

5.00(
8
)

Ideal Comfort HVAC

5.00(
8
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

If you find your air conditioning or heating units not working properly, call us immediately. We proudly serve Southern New Hampshire and the Merrimack Valley at affordable prices with our work. Ideal Comfort can provide full maintenance and service for your HVAC system in your home, small commercial building or office. Our team of knowable technicians are ready to tackle anything from small to complex jobs.

"They were very friendly, reliable, and did excellent work. I highly recommend them."

RuthAnn W on August 2022

If you find your air conditioning or heating units not working properly, call us immediately. We proudly serve Southern New Hampshire and the Merrimack Valley at affordable prices with our work. Ideal Comfort can provide full maintenance and service for your HVAC system in your home, small commercial building or office. Our team of knowable technicians are ready to tackle anything from small to complex jobs.

"They were very friendly, reliable, and did excellent work. I highly recommend them."

RuthAnn W on August 2022

Avatar for Moonworks Home Improvement

Moonworks Home Improvement

4.34(
124
)

Moonworks Home Improvement

4.34(
124
)
Customers say: Super punctual
1993 years of experience

For over 20 years, Moonworks has operated around one core principle, that the customer deserves the very best. Over the past two decades, Moonworks has expanded the product line include quality brands like Gutter Helmet, EcoView windows & doors, Dr. Energy Saver insulation and energy saving products, Ice Defense featuring Heated Helmet and GAF Master Elite certified roofing. Though our company has expanded, our principle remains the same: provide first-class customer service and offer the very best materials combined with professional installation.

"i have been acting as an agent/advocate for my mom who is 87. she had a roof installed which has had numerous leaks. 2 in garage (now taken care of) where solar lines go through to roof panels.; 1 from improperly sealed window (also ok now) leaking into 3 season porch, causing water damage; 1 around improperly flashed chimney (paid another company $1800 to repair), and now, another one where roof meets vertical end wall of house (leaking into 2nd floor ceiling and down wall into kitchen). Have been calling company for OVER A MONTH and still have not gotten any help from them. They DO NOT RETURN PHONE CALLS!!! Customer service (Ashley and Ryan) have both "left messages for Jesse" as well as "reaching out to him personally". I now have left messages on his cell, and WILL BE FILING COMPLAINT WITH BBB, Office of Elderly Affairs, AG, and State Board of Licensing!! ****STAY AWAY*** ***READ REVIEWS*** (here AND on other sites!!)"

m k on November 2018

For over 20 years, Moonworks has operated around one core principle, that the customer deserves the very best. Over the past two decades, Moonworks has expanded the product line include quality brands like Gutter Helmet, EcoView windows & doors, Dr. Energy Saver insulation and energy saving products, Ice Defense featuring Heated Helmet and GAF Master Elite certified roofing. Though our company has expanded, our principle remains the same: provide first-class customer service and offer the very best materials combined with professional installation.

"i have been acting as an agent/advocate for my mom who is 87. she had a roof installed which has had numerous leaks. 2 in garage (now taken care of) where solar lines go through to roof panels.; 1 from improperly sealed window (also ok now) leaking into 3 season porch, causing water damage; 1 around improperly flashed chimney (paid another company $1800 to repair), and now, another one where roof meets vertical end wall of house (leaking into 2nd floor ceiling and down wall into kitchen). Have been calling company for OVER A MONTH and still have not gotten any help from them. They DO NOT RETURN PHONE CALLS!!! Customer service (Ashley and Ryan) have both "left messages for Jesse" as well as "reaching out to him personally". I now have left messages on his cell, and WILL BE FILING COMPLAINT WITH BBB, Office of Elderly Affairs, AG, and State Board of Licensing!! ****STAY AWAY*** ***READ REVIEWS*** (here AND on other sites!!)"

m k on November 2018

RDH ELECTRIC, LLC

5.00(
6
)

RDH ELECTRIC, LLC

5.00(
6
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

RDH ELECTRIC, LLC provides a large spectrum in the electrical field that began in 1984. We are family owned and provide a fully insured, reliable service, up-to-date with National Electrical Code and compliance, pro-energy savings and green initiatives with energy efficient solutions! WE ARE FULLY LICENSED & INSURED. We accept Major Credit Cards.

RDH ELECTRIC, LLC provides a large spectrum in the electrical field that began in 1984. We are family owned and provide a fully insured, reliable service, up-to-date with National Electrical Code and compliance, pro-energy savings and green initiatives with energy efficient solutions! WE ARE FULLY LICENSED & INSURED. We accept Major Credit Cards.

APPLE VALLEY ELECTRIC

4.67(
3
)

APPLE VALLEY ELECTRIC

4.67(
3
)
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Residential electrical contractor focused on superior service at a reasonable price. Service visits are welcome, all calls are returned promptly. Most work is covered by a two-year warranty Check out my website for further information.

Residential electrical contractor focused on superior service at a reasonable price. Service visits are welcome, all calls are returned promptly. Most work is covered by a two-year warranty Check out my website for further information.

Showing 1-10 of 30
Energy Efficiency Auditing questions, answered by experts

Yes, Tesla Powerwalls are worth the upfront costs, as you can recoup your investment within six to eight years. Plus, they provide peace of mind that you'll have power during a power outage, and, depending on the system you install, you can become energy-independent. While they may be more expensive than other solar power systems, they offer higher battery capacity and lifespan.

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. 

No, it isn’t necessary to have energy-efficient windows. However, if you care about your energy bill and making your windows more energy efficient, fixing any heat, UV, or air transfer issues is an excellent way to lower your bills and keep your house cooler in the summer and warmer in the winter.

An average, 400-square-foot electric heated driveways consume approximately $3 per hour in terms of electricity. The price may slightly fluctuate depending on your local energy cost. A simple formula to calculate your heated driveway’s total wattage consumption is by multiplying the square footage by 50 watts and then dividing it by 1,000 to get the kilowatt number. Multiply that with your local energy cost per hour and there you have the hourly operating cost.

Typically, triple-pane windows made with krypton gas filling are the most energy efficient. A window’s frame, glass, design, and installation all affect its energy efficiency. These windows, in particular, are designed highly effectively in terms of their ability to insulate.

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