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TRUSTED BY HAMDEN, CT HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon10
    Verified energy efficiency auditing services reviews

Top-Rated Energy efficiency auditors in Hamden - Updated Nov 2026

Avatar for Gabriel Hahn
Gabriel Hahn
New to Angi
Home Energy Audit

Serving Hamden, CT and surrounding areas

Approved

Emergency services offered

Small jobs welcome

Credit card accepted

I conduct energy audit tests for homes, whether they are colonial or brand new construction. I can recommend you various forms of weathersealant, thermal wrappings, and storm window techniques, saving you thousands in the form of long-term heat insulation tech-forward solutions.

Rachel Solar Specialist
New to Angi
Energy Audit - For BusinessHome Energy Audit

Serving Hamden, CT and surrounding areas

Approved

In business since 2021

Free estimates

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. \n

Response time9 hrs
Avatar for New England Conservation Services, LLC
New England Conservation Services, LLC
4.9(
8
)
Home Energy Audit

Serving Hamden, CT and surrounding areas

In business since 2006

Free estimates

Credit card accepted

"We have had NECS to our home several times for different projects: energy audit, attic insulation, and wall insulation. These are very professional, considerate, and honest people to do such work in your home. Our house is much more energy efficient after all we have done. Insulation pays for itself very quickly, and NECS took care of all incentive programs for us. You won't go wrong with them."
Sidewall Insulatiiom
Spinsulated house
Response time6 days
Recommended by100%of homeowners
Avatar for NEW ENGLAND SMART ENERGY
NEW ENGLAND SMART ENERGY
4.9(
13
)
Energy Audit - For BusinessHome Energy Audit

Serving Hamden, CT and surrounding areas

In business since 2009

Emergency services offered

"The service was great. They gave a lot of really helpful suggestions. They replaced our bulbs with low energy bulbs. They put in weather stripping in areas needed as well. They were great to work with. They gave a detailed report on how to lower our energy usage."
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NESEG Certified Techs
Blower Door Test

+38

Recommended by91%of homeowners
Avatar for HARP Home Services LLC
HARP Home Services LLC
4.5(
488
)
Energy Audit - For BusinessHome Energy Audit

Serving Hamden, CT and surrounding areas

In business since 1992

Free estimates

Emergency services offered

"Each technician who did the maintenance work seemed very knowledgeable. Each was also very personable and helpful in answering any questions I had and pointing out things I should be aware of. I have used HARP for over 12 years and the one time there was a problem due to faulty work by one of the technicians, HARP looked into the matter and assumed full responsibility for repairs/costs associated with fixing the problem in a timely fashion. I have found HARP to be very dependable and I really count on them."
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+9

Recommended by93%of homeowners
Avatar for R & R Heating & Cooling
R & R Heating & Cooling
5.0(
18
)
Energy Audit - For BusinessHome Energy Audit

Serving Hamden, CT and surrounding areas

In business since 2001

Free estimates

Emergency services offered

"It was excellent. Ramon was incredibly thorough in terms of checking everything. Anytime there's any issue I can call him and troubleshoot through the phone, and if not, he'll come over and fixed it."
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+19

Response time1 day
Response rate100%
Recommended by100%of homeowners
Avatar for Vista Home Improvement
Vista Home Improvement
4.3(
419
)
Energy Audit - For BusinessHome Energy Audit

Serving Hamden, CT and surrounding areas

In business since 2005

Free estimates

Emergency services offered

"They did an excellent assessment, were good listeners for our goals, gave us updates as to when the custom windows would arrive, installed promptly and expertly respecting our time limits due to our children's nap schedule, cleaned up, communicated with us through the installation, and we have had reductions in our energy bill since the installation.
"
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+41

Recommended by87%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

R-value measures an insulation material's thermal resistance, indicating its ability to resist heat transfer. A higher R-value signifies better insulation performance because the material is more effective at slowing heat flow. The R-value depends on the type, thickness, and density of the insulation material, such as fiberglass, foam, or cellulose. Each inch of insulation typically provides an R-value between 3 and 8. There is no single universal R-value; the optimal choice depends on your climate zone. Colder climates require a much higher R-value than warmer ones to maintain energy efficiency, keep the home warm in winter and cool in summer, and manage costs.

Solar water heating systems are not one-size-fits-all. You'll likely work with a team of experts to get the job done—including solar panel installers, plumbers, and water heater installers. A specialist will help you decide if a passive or active system is best for your local weather, home layout, roof stability, and your budget.

Services by electricians can quickly get expensive, but there are a few ways you can save money in the process:

  • Bundle multiple jobs done at the same time to save on trip fees or flat fees for individual projects.

  • Get at least three quotes for service to find the best deal.

  • Buy fixtures, switches, outlets, and other materials beforehand to avoid product markup.

  • If you feel comfortable with it, have an apprentice or journeyman complete the work under the supervision of a master electrician. These electricians in training tend to charge less per project.

Window AC units use a fair amount of electricity, but significantly less than central AC systems. Because they are more energy-efficient for cooling individual rooms or small spaces, their usage is comparatively low. On average, a window AC unit consumes between 500 and 1,400 watts, while a central AC system uses over 3,500 watts—meaning a window unit uses about one-third of the energy. This typically translates to a monthly running cost of $15 to $40, although this can vary depending on external factors.

A blower door test shouldn’t take more than an hour, and most can be completed in less than 30 minutes. Expect the test to take longer once you start searching for leaks with thermal imaging or want to include sealing such leaks in the time estimate. The test doesn’t take much time and can’t be rushed, but it will take longer in large homes or those with many air leaks.

The Hamden, 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.