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Products & Services

Home Energy Saving & Audit

Energy Efficiency Audit

Energy Saving Devices

Energy Saving Products

Energy Saving Tips

Home Energy Audit

Home Energy Conservation

Home Insulation

Attic Insulation

Blown In Insulation

Cellulose Insulation

Duct Insulation

Green Insulation

Insulation Contractors

Pipe Insulation

Reflective Insulation

Rigid Foam Insulation

Roof Insulation

Spray Foam Insulation

Wall Insulation

Window Insulation

Water Heaters

Electric Water Heaters

Gas Water Heaters

High Efficiency Water Heater

Hot Water Heaters

Indirect Water Heater

Instant Hot Water Heater

On Demand Hot Water Heaters

Solar Water Heater

Tankless Water Heaters

Water Heater Installation

Water Heater Replacement

Hvac Systems

Air Conditioning Contractors

Air Conditioning Systems

Boiler Heating Systems

Central Air Conditioning

Ductless Air Conditioning

Gas Furnace

Geothermal Heating And Cooling

Heating And Cooling Systems

High Efficiency Furnace

Home Heating Systems

Hvac Companies

Hydronic Heating Systems

Air Sealing

Sealing Air Leaks

Air Duct Leakage

Air Duct Sealing

Air Leakage Testing

Door Air Seal

Window Air Leakage

Radiant Barrier

Radiant Barrier Insulation

Radiant Barrier Cost

Roof Radiant Barrier

Ductwork

Ductwork Repair

Ductwork Installation

Ductwork Cost

Furnace Ductwork

Hvac Ductwork

Replacement Windows & Doors

Anderson Replacement Windows

Best Replacement Windows

Fiberglass Replacement Windows

Home Window Replacement

Low E Glass

Low E Windows

Marvin Replacement Windows

Vinyl Replacement Windows

Company Awards

Loudoun's Favorite Insulation Company 2019

The results are in from Loudoun Now's Annual Favorites Poll. Comfenergy is the winner for Favorite Insulation Company!... [Read more]

Best of Loudoun - 2019

We won the Best Insulation Company in Loudoun County again this year!!... [Read more]

2018 Superior Service Business of the Year

Comfenergy earned the 2018 Superior Service Business of the Year award from the Loudoun County Chamber of Commerce... [Read more]

More Awards

Experienced Home Energy Audit & Insulation Solutions in Prince William County, VA

Happy Customers Surrounding Prince William County, VA

Testimonials

Reviews

Work Requests

Click the icons to see what our customers had to say.

Reviews from our customers in Prince William County, VA

5.0/5
Daisy M. Daisy M. Scotland Loop

4.8/5
Syed B. Syed B. Smith Pond Ln

4.2/5
Cory C. Cory C. Lake Jackson Dr

I was referred to Comfenergy by my HVAC contractor due to the fact that my home's heating system would need to be supplemented by improving my home's energy efficiency. The first test by Comfenergy found that my home was 159% inefficient. We worked out a plan to improve my home's energy efficiency as cost effectively and with as little intrusion as possible. Insulating my crawl space and attic improved my home's energy efficiency by 50% which reduced my electric bills by reducing the need for my heating system to run as long and overall improving the comfort of my home.

5.0/5
Donna K. Donna K. Fostern Lane

Very detailed work.

5.0/5
Kelly D. Kelly D. Saddlehorn Court

Mike, Christine and Jordan were all wonderful to our family. Having people like that representing your company says a lot.

5.0/5
Kevin F. Kevin F. Looking Glass Ct.

5.0/5
John S. John S. Morningside Dr

5.0/5
Brewer Brewer Horncastle Ct.

4.2/5
Jimmie Brewer Jimmie Brewer Horncastle Ct.

5.0/5
Michael M. Michael M. Roaring Spring Loop

5.0/5
Chris Chris Bristow, VA

5.0/5
Jason A. Jason A. Golders Green Pl

5.0/5
Jason A. Jason A. Golders Green Pl.

4.8/5
Jo Mulatz Jo Mulatz Nokesville, VA

They kept me informed of everything that was being done.

5.0/5
Bryan R. Bryan R. Gunner Ct

5.0/5
Marie P. Marie P. Cannon Bluff Dr

5.0/5
Sheree Sheree Wade Lane

5.0/5
Sheree S. Sheree S. Wade Lane

5.0/5
Michael P. Michael P. Paddock Court

4.4/5
Gerald M. Gerald M. MISTY CREEK CT

5.0/5
Barrie P. Barrie P. Fieldstone Way

5.0/5
Mark C. Mark C. Gainesville, VA

5.0/5
Lee R. Lee R. Gainesville, VA

5.0/5
Patricia C. Patricia C. Gainesville, VA

4.3/5
John E. John E. Retriever Lane

5.0/5
Robert & Patricia C. Robert & Patricia C. Affirmed Place

Cyrus came to quiet a fan that had been recently installed. My wife and I were both very impressed with his problem-solving ability. As he determined, the noise had nothing to do with the fan. He also removed some water from an outside vent which he thought, and correctly so, was causing the noise. He reattached the wallboard to the ceiling when he had finished. The problem has been solved and the fan is quiet again. Further, Mr. Toby demonstrated excellent interpersonal skills. He was able to explain, in terms we could understand, what he was doing and gave us some choices for solutions along the way. We will recommend your company to others and certainly come to you first, if we should need your expertise again.

5.0/5
Jonathan F. Jonathan F. Chanceford Dr

5.0/5
Samuel W. Samuel W. Kapp Lane

5.0/5
Willy S. Willy S. Coachview Court

Reviews From Prince William County

By Robert & Patricia C.

Gainesville, VA

Tuesday, Aug 25th, 2020

"Cyrus came to quiet a fan that had been recently installed..."

View Details
By Barrie P.

Gainesville, VA

Wednesday, Jun 17th, 2020

"polite, tidy, did an excellent job in the time quoted"

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By Barrie P.

Gainesville, VA

Thursday, Jun 18th, 2020

"The scheduling department was very easy to work with. "

View Details

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Manassas Park homeowner wanted an energy audit on a few areas with heating/cooling issues....

Testimonial from Kris from Manassas Park, VA

Spray Foam, Attic & Crawl Space Insulation Experts Proudly Serving Prince William County, VA

Comfenergy is an authorized dealer of the nationally renowned Dr. Energy Saver network of the best energy-conservation contractors across the country. We are not just a contractor company, we specialize in helping you understand your home's current energy efficiency, suggest repairs, and we also do the work! You'll receive the maximum energy and cost-saving results with least amount of hassle.

Spray foam, Attic, Crawl Space, & Blow in Insulation in Prince William County.

We offer FREE estimates for the following services:

Complete Home Energy Audit
Insulation
Crawl Space Repair
Sealing Air Leaks
Radiant Barrier Installation
Window replacement
Ductwork

Get your FREE, no-obligation services estimate in Prince William County, VA, you'll also receive a free copy of "Saving Energy and Money at Home," a great book to use as you begin to create a more comfortable, healthy, and energy efficient home!

> Schedule Your Free Estimate

Case Studies From Prince William County

This Gainesville, VA homeowner had a frozen bib. We needed to replace the pipe and then find a way to prevent it from happening again.

Click to read solution...

This Reston, VA homeowner was looking to make their home less drafty, lower their utility bills, and become more comfortable in general.

Click to read solution...

More Case Studies

Experienced Home Energy Audit & Insulation Solutions in Prince William County, VA

Spray Foam, Attic & Crawl Space Insulation Experts Proudly Serving Prince William County, VA

Spray foam, Attic, Crawl Space, & Blow in Insulation in Prince William County.

We offer FREE estimates for the following services:

our service area