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TRUSTED BY WORCESTER, MA HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon18
    Verified energy efficiency auditing services reviews

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

Avatar for AVID Energy Solutions
AVID Energy Solutions
5.0(
24
)
Energy Audit - For BusinessHome Energy Audit

Serving Worcester, MA and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

AVID Energy Solutions is a team of experts dedicated to helping homes reduce their energy output and monthly utility bills. Based in Methuen and Sutton MA, we work with clients throughout Massachusetts and New Hampshire to find the best possible solutions for their needs and budget. We believe that everyone should have access to affordable, reliable energy efficient solutions, and we are committed to providing that access. Our team is composed of certified energy auditors, professional installers, and friendly customer service representatives who are all committed to providing the highest level of service. We offer a no-cost home assessment to get started, and we work with you every step of the way to ensure that you are getting the most out of your investment. Contact us today to schedule your free home assessment and start saving!

14 neighbors recently requested a quote
Avatar for Green Collar
Green Collar
4.6(
37
)
Home Energy AuditEnergy Audit - For Business

Serving Worcester, MA and surrounding areas

Approved

In business since 2000

Free estimates

Warranties offered

"fantastic honest company with highly competent energy advisor and crew.They were efficient and cleaned up after the job.I did not have to lift a finger.Do yourself a favor and call them or send an email.You won't regret it."
Net and Blow
Ceiling net and blow
Truck in Driveway
Knee Wall Slope 2" Board
Attic Open Blow Cellulose

+2

Response time2 days
Response rate86%
49 neighbors recently requested a quote
Avatar for Green Collar
Green Collar
4.6(
37
)
Energy Audit - For BusinessHome Energy Audit

Serving Worcester, MA and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

Established in 2014, Green Collar is a leading energy efficiency solutions provider for businesses and homeowners. We help our clients conserve energy, improve comfort, and save money through increased energy efficiencies. \n \nWhat sets us apart is our unwavering commitment to exceptional quality, backed by over two decades of collective industry expertise within our team. Our comprehensive range of services includes home energy assessments, home insulation and weatherization, as well as HVAC services. We offer a complimentary home energy assessment to accurately pinpoint areas of inefficiency within your home. Subsequently, our experienced energy consultants will offer personalized recommendations to effectively address and resolve any identified issues.

New Construction
New Construction
New Construction
Attic and Knee wall Retro
Attic and Knee wall Retro

+2

1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for ENDLESS ENERGY NEW ENGLAND, INC.
ENDLESS ENERGY NEW ENGLAND, INC.
4.7(
20
)
Home Energy AuditEnergy Audit - For Business

Serving Worcester, MA and surrounding areas

Approved

In business since 1980

Free estimates

Emergency services offered

Endless Energy is a trusted local HVAC and Plumbing Company servicing the majority of the state of Massachusetts with office in Marlborough, Needham, and Randolph. Specializing in Heat Pumps, Central AC, Furnaces, and Boilers, we have Master Plumbers, Electricians, and HVAC Technicians all under one roof reducing your need to find multiple contractors! We are also a Mass Save partner and can conduct your no cost Mass Save Home Energy Assessment and install any recommended insulation.\n\nWe can help you with: \n*Heating Repairs, Installation, & Service\n*AC Repairs, Installation, & Service\n*Plumbing Repairs, Installation & Service\n*Water Heater Replacement & Service\n*Indoor Air Quality Solutions\n*Ductwork & Line Set Solutions\n*Electrical Panel Upgrades and Replacement\n*Insulation \n*No Cost Home Energy Assessments\n\nA Mass Save certified contractor with an A+BBB rating. All of our skilled technicians undergo an extensive background and drug screening prior to being hired to our team!

Holliston Heat Pump
Boston Heat Pump
Natick Ducted System
226 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for Gabriel Hahn
Gabriel Hahn
New to Angi
Home Energy Audit

Serving Worcester, MA 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.

Avatar for The Energy Monster, Inc.
The Energy Monster, Inc.
5.0(
6
)
Home Energy Audit

Serving Worcester, MA and surrounding areas

In business since 2011

Free estimates

Credit card accepted

"Energy monster was very courteous, knowledgeable, and went way beyond, they cleaned , and vacuumed after all work was done, I would highly recommend them to everyone...outstanding company , shamus and his crew were awesome."
Untitled Gallery 1
Recommended by100%of homeowners
Avatar for Tingley Electric Services Inc
Tingley Electric Services Inc
4.7(
219
)
Energy Audit - For BusinessHome Energy Audit

Serving Worcester, MA and surrounding areas

In business since 2003

Credit card accepted

"The two fellows were prompt and professional.. My two light switch issues were quickly corrected by using the proper light bulbs.. Those energy savers don't work on everything!  We are doing basement work and they did the wiring for new lights as well.  Should I need more done, I wouldn't hesitate to use them again.
"
Our Staff
Our Staff
Additional Photos
Additional Photos
Additional Photos

+1

Recommended by95%of homeowners
Avatar for Commonwealth Energy MA
Commonwealth Energy MA
4.5(
32
)
Energy Audit - For BusinessHome Energy Audit

Serving Worcester, MA and surrounding areas

In business since 2017

Free estimates

Credit card accepted

"Words can’t explain how excellent of a consultant Julian is ! I was very indecisive about solar until Julian gave me all the information I needed on behalf of solar while saving me a ton of money. I reffed my whole family to him and if anyone is looking to go solar or get information on solar definitely contact Julian ! his personality is unreal making you feel more like family. I’m glad to be apart of Commonwealth energy !"
Methuen installation
Methuen installation
Methuen installation
Additional Photos
Additional Photos

+5

Recommended by84%of homeowners
Avatar for HUGH'S ENERGY CONSERVATION
HUGH'S ENERGY CONSERVATION
4.4(
118
)
Energy Audit - For BusinessHome Energy Audit

Serving Worcester, MA and surrounding areas

In business since 1975

Free estimates

Credit card accepted

"Hugh's Energy is a quality company and it starts at the top with owner-President, Tom Dromgoole. Tom made a site visit to my home to discuss details of the insulation including the process, timing, and outcomes; he answered all of my questions. He also came the day of the insulation to check on how things were going. His crew, led by Parris, was excellent - knowledgeable, efficient and clean. If you are considering insulating your home, just call this company and save yourself time."
Recommended by93%of homeowners
Avatar for The Energy Monster MA, Inc.
The Energy Monster MA, Inc.
4.2(
14
)
Home Energy Audit

Serving Worcester, MA and surrounding areas

In business since 2003

Free estimates

Credit card accepted

"These guys were fantastic! Mike really knows his heat pumps and it showsâ he was always available via email when I had a question, he walked us through the entire process for applying for the state heat pump rebates, and we couldnâ t be happier with the system one year in. Because of our Initial positive experience with Mike, we also hired Energy Monster to do our solar panel installation. Top notch, LOCAL company!"
Mitsubishi Ductless Mini Splits
Holland, MA (5.3KW)
Marlboro,MA (7.8KW)
Energy Audits in MA
Response time2 days
Recommended by100%of homeowners
Showing 1-10 of 29
Energy Efficiency Auditing FAQs, answered by experts

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.

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

Attic and whole-house fans improve a home's energy efficiency and comfort. They ventilate hot air from the attic, which reduces peak cooling loads, lowers reliance on air conditioning, and decreases indoor temperatures. This improved air circulation and expedited heat exit helps lower cooling costs, balance moisture levels, and enhance overall natural airflow, contributing to the efficient operation of other home equipment.

Leaving lights on raises the electric bill, but not as much as having high-wattage light bulbs. The best way to save on electric costs is to swap your light bulbs to LED or CFL bulbs that use far fewer watts. You can also use smart lights and light switches to control usage via a smartphone or voice-controlled device.

R-value is calculated by dividing the thickness of an insulation material by its thermal conductivity. The material's composition and density influence thermal conductivity. Materials with lower conductivity values provide better insulation. The higher the R-value, the better the material is at insulating, helping homeowners select insulation that meets the energy needs of their climate and home layout.

The Worcester, MA homeowners’ guide to energy efficiency auditing services

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