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Find Energy efficiency auditors in Ashburn

Avatar for Home Energy Saving Solutions

Home Energy Saving Solutions

4.97(
88
)
Approved Pro

Home Energy Saving Solutions

4.97(
88
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
15 years of experience

As a Maryland certified Home Performance with Energy Star contractor, we focus on making homes efficient and comfortable. Our energy audits and energy efficiency improvements usually qualify for generous state incentives and rebates through Pepco, BGE, and Potomac Edison. Mo is the owner/operator at Home Energy Saving Solutions. He has a deep depth of knowledge and experience gained from well over 1000 energy audits. Participation in numerous industry groups and conferences further enhance the expertise brought to each home energy audit. We will inspect your entire home as a system and evaluate energy loss and comfort issues using advanced diagnostic equipment. At the conclusion of the audit you will be presented with a comprehensive report detailing all findings and solutions, along with a payback period for repair and retrofit options.

"Mohammed handled our project—sealing and insulating our attic. He was very knowledgeable about the best way to accomplish the task in an older home such as ours; and he also ensured that our project qualified for relevant energy rebates. He was professional and courteous in answering all our questions and completed the project in one day. We highly recommend HESS and Mohammed El-Goul."

Janet B on August 2024

As a Maryland certified Home Performance with Energy Star contractor, we focus on making homes efficient and comfortable. Our energy audits and energy efficiency improvements usually qualify for generous state incentives and rebates through Pepco, BGE, and Potomac Edison. Mo is the owner/operator at Home Energy Saving Solutions. He has a deep depth of knowledge and experience gained from well over 1000 energy audits. Participation in numerous industry groups and conferences further enhance the expertise brought to each home energy audit. We will inspect your entire home as a system and evaluate energy loss and comfort issues using advanced diagnostic equipment. At the conclusion of the audit you will be presented with a comprehensive report detailing all findings and solutions, along with a payback period for repair and retrofit options.

"Mohammed handled our project—sealing and insulating our attic. He was very knowledgeable about the best way to accomplish the task in an older home such as ours; and he also ensured that our project qualified for relevant energy rebates. He was professional and courteous in answering all our questions and completed the project in one day. We highly recommend HESS and Mohammed El-Goul."

Janet B on August 2024


Avatar for Relax HVAC, Inc.

Relax HVAC, Inc.

5.00(
28
)
Approved Pro

Relax HVAC, Inc.

5.00(
28
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
17 years of experience

Relax HVAC, Inc. is a fully insured and licensed heating and air conditioning firm in Ashburn, Virginia, composed of Master Technicians led by Kamal. He and his team provide round-the-clock emergency services for residential and commercial customers, including those in the Iranian, Arabic, and Palestinian communities. With more than 25 years of experience in providing air conditioning services, Kamal takes pride in making customers feel good about his company. He does this by giving them quality and honest services at great prices. His services are approved and recommended by the Loudoun County Fire Department.

"My AC failed and I had limited time to find a good solution, I made a phone call to Relax HVAC based on the online reviews and it was a great decision. Nasser came to check the situation, he gave a very detailed and comprehensive overview of the situation and provided with the options I had. I decided to replace the unit, Nasser went above and beyond to find a unit delivery service but there was nothing available over the weekend so this gentleman went for unit pick up himself and finished the installation within a day from my initial call. Moreover, the provided price was very reasonable.I can't be more happy with the outcome and highly recommend Relax HVAC"

Navid P on July 2024

Relax HVAC, Inc. is a fully insured and licensed heating and air conditioning firm in Ashburn, Virginia, composed of Master Technicians led by Kamal. He and his team provide round-the-clock emergency services for residential and commercial customers, including those in the Iranian, Arabic, and Palestinian communities. With more than 25 years of experience in providing air conditioning services, Kamal takes pride in making customers feel good about his company. He does this by giving them quality and honest services at great prices. His services are approved and recommended by the Loudoun County Fire Department.

"My AC failed and I had limited time to find a good solution, I made a phone call to Relax HVAC based on the online reviews and it was a great decision. Nasser came to check the situation, he gave a very detailed and comprehensive overview of the situation and provided with the options I had. I decided to replace the unit, Nasser went above and beyond to find a unit delivery service but there was nothing available over the weekend so this gentleman went for unit pick up himself and finished the installation within a day from my initial call. Moreover, the provided price was very reasonable.I can't be more happy with the outcome and highly recommend Relax HVAC"

Navid P on July 2024


"I contacted Bluestar Air Mechanical for a second opinion after an appointment with Air One. I have a Carrier HVAC system, and the Air One technician recommended a complete system replacement, claiming the blower was bad, the furnace control board needed replacing, and that there were other issues. Since replacing the HVAC is a big investment, I wanted to get a second opinion. It was only after comparing the service from Bluestar that I realized Air One may have been pushing for a new system sale or lacked the expertise to properly diagnose and repair the actual problems. Isaac, the technician from Bluestar, spent about an hour thoroughly diagnosing and fixing the issues. He found burnt wiring in the furnace and discovered that the wrong capacitor had been incorrectly installed in the AC. Isaac replaced the burnt wiring in the furnace and the capacitor in the AC. After these repairs, my Carrier system was back up and running—without the need for a costly replacement. Bluestar, and Isaac in particular, demonstrated professionalism, expertise, and honesty. They focused on resolving the actual issues instead of pushing for an unnecessary system replacement. I highly recommend Bluestar for their reliable service and Isaac’s thorough and knowledgeable work."

James C on October 2024

BlueStar Air Mechanical is a call away for your repair, maintenance and installation needs. We specialize in fixing and tuning up cooling, heating and plumbing systems for both residential homes and commercial establishments.

"I contacted Bluestar Air Mechanical for a second opinion after an appointment with Air One. I have a Carrier HVAC system, and the Air One technician recommended a complete system replacement, claiming the blower was bad, the furnace control board needed replacing, and that there were other issues. Since replacing the HVAC is a big investment, I wanted to get a second opinion. It was only after comparing the service from Bluestar that I realized Air One may have been pushing for a new system sale or lacked the expertise to properly diagnose and repair the actual problems. Isaac, the technician from Bluestar, spent about an hour thoroughly diagnosing and fixing the issues. He found burnt wiring in the furnace and discovered that the wrong capacitor had been incorrectly installed in the AC. Isaac replaced the burnt wiring in the furnace and the capacitor in the AC. After these repairs, my Carrier system was back up and running—without the need for a costly replacement. Bluestar, and Isaac in particular, demonstrated professionalism, expertise, and honesty. They focused on resolving the actual issues instead of pushing for an unnecessary system replacement. I highly recommend Bluestar for their reliable service and Isaac’s thorough and knowledgeable work."

James C on October 2024


Avatar for Founders Insulation

Founders Insulation

4.93(
15
)
Approved Pro

Founders Insulation

4.93(
15
)
Approved Pro
Customers say: Quick response
3 years of experience
Free onsite estimate

Founders Insulation, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"From initial contact to site visit to quotation service and follow-up, Brian and team at Founders Insulation provided an easygoing and excellent experience. They were able to accommodate our insane schedule when they had an unexpected opening, and did fantastic work, adding some essential services just the day before they arrived. Will work with them again in a heartbeat. Before, during and after photos attached."

Chris O on November 2025

Founders Insulation, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"From initial contact to site visit to quotation service and follow-up, Brian and team at Founders Insulation provided an easygoing and excellent experience. They were able to accommodate our insane schedule when they had an unexpected opening, and did fantastic work, adding some essential services just the day before they arrived. Will work with them again in a heartbeat. Before, during and after photos attached."

Chris O on November 2025


Avatar for EDGE Energy

EDGE Energy

4.71(
26
)
Approved Pro

EDGE Energy

4.71(
26
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
19 years of experience

EDGE Energy is a licensed, insured, and bonded contractor in (DC, VA, and MD) incorporating green building standards during energy-saving installations for home and business owners.
Our special focus is designing and installing projects which decrease utility bills and energy consumption by 25% to well over 100% - even creating homes that are net-positive.
Our Company started in 2006 with 2 employees and has managed to grow substantially over the past 6 years, now employing 24 people in 3 states. The Companys workers have received training under numerous building science, weatherization, and renewable energy system designations.
As a core value to our customer service policy, we assist homeowners with their tax credits, rebates, and grant paperwork - just trying to make going-green easy.

""

Fred B on November 2021

EDGE Energy is a licensed, insured, and bonded contractor in (DC, VA, and MD) incorporating green building standards during energy-saving installations for home and business owners.
Our special focus is designing and installing projects which decrease utility bills and energy consumption by 25% to well over 100% - even creating homes that are net-positive.
Our Company started in 2006 with 2 employees and has managed to grow substantially over the past 6 years, now employing 24 people in 3 states. The Companys workers have received training under numerous building science, weatherization, and renewable energy system designations.
As a core value to our customer service policy, we assist homeowners with their tax credits, rebates, and grant paperwork - just trying to make going-green easy.

""

Fred B on November 2021


Avatar for 3 PROS Basement System

3 PROS Basement System

4.52(
22
)
Approved Pro

3 PROS Basement System

4.52(
22
)
Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
5 years of experience

3 Pros Basement Systems uses proven basement waterproofing, sump pump and crawl space encapsulation solutions to help eliminate wet basements and nasty crawl spaces. We can help make the air in your home drier, healthier and more comfortable. We offer free inspections and will focus on the science of your home to design a project to improve wet basements, cold floors, drafty rooms, nasty crawl spaces and high energy bills. We have worked in 1000's of homes across Northern Virginia and West Virginia and always enjoy clients who call us days after service to let us know how much they can feel the differences in their home.

"great"

Qasim M on May 2023

3 Pros Basement Systems uses proven basement waterproofing, sump pump and crawl space encapsulation solutions to help eliminate wet basements and nasty crawl spaces. We can help make the air in your home drier, healthier and more comfortable. We offer free inspections and will focus on the science of your home to design a project to improve wet basements, cold floors, drafty rooms, nasty crawl spaces and high energy bills. We have worked in 1000's of homes across Northern Virginia and West Virginia and always enjoy clients who call us days after service to let us know how much they can feel the differences in their home.

"great"

Qasim M on May 2023


Avatar for Comfenergy

Comfenergy

4.29(
33
)
Approved Pro

Comfenergy

4.29(
33
)
Approved Pro
Customers say: Quick response
12 years of experience
Free onsite estimate

Comfenergy is a locally owned & operated Insulation Contractor. We focus on home comfort and energy efficiency. We specialize in residential & commercial solutions designed to improve the overall comfort, health and energy efficiency of the home or office. As a full-service home insulation contractor we start by conducting a comprehensive home comfort and energy evaluation to identify and locate all the energy losses and weaknesses throughout your building. After the testing, we are able to put together a prioritized list of the most cost-effective solutions to correct comfort and energy wasting issues. From there we leave the decision making entirely up to you, letting you pick which home improvements you would like applied to your home. Our main goal is to focus on the most important needs of your building?. Why insulate the garage walls if all of your conditioned air is being lost to the attic? Call for a free estimate in insulation or air sealing solutions.

"They were great."

Laura O on May 2024

Comfenergy is a locally owned & operated Insulation Contractor. We focus on home comfort and energy efficiency. We specialize in residential & commercial solutions designed to improve the overall comfort, health and energy efficiency of the home or office. As a full-service home insulation contractor we start by conducting a comprehensive home comfort and energy evaluation to identify and locate all the energy losses and weaknesses throughout your building. After the testing, we are able to put together a prioritized list of the most cost-effective solutions to correct comfort and energy wasting issues. From there we leave the decision making entirely up to you, letting you pick which home improvements you would like applied to your home. Our main goal is to focus on the most important needs of your building?. Why insulate the garage walls if all of your conditioned air is being lost to the attic? Call for a free estimate in insulation or air sealing solutions.

"They were great."

Laura O on May 2024


Avatar for Root Electric

Root Electric

4.96(
592
)

Root Electric

4.96(
592
)
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers

At Root Electric it is our honor to offer our customers superior service from the first telephone call to the final payment. Root Electric specializes in working directly with homeowners, business owners and facility managers in electrical construction, upgrades and service. All of our electricians are experienced and well-trained employees of root electric. Additionally, we do not sub-contract to any outside workers or companies for electrical work. Root Electric employs a dedicated sales staff to handle customer's telephone calls and to estimate projects. This insures that all telephone calls are returned in a timely manner and that all projects are accurately priced and scheduled. Additional DBA - William J Root Inc, Rootelectric. Award winning. Additional emails - [email protected], [email protected], [email protected]. Additional contact name - William Bill. Additional phones - (703) 618-5390.

"I had a new electrical line I wanted to run for a display light attached to a grandfather clock in our foyer. I also requested a switch be added to our wall panel by the front door to operate it. The job involved seeking a route for running wire behind the ceiling and drywall from our basement to the first floor of the house. The installation was complicated and obviously required a healthy amount of expertise in all respects. The work was accomplished with a minimal amount of mess (two small holes) and the quad switch panel added by our front door operates flawlessly. During the same visit they also replaced four decorative ceiling light fixtures and repaired a bad electrical outlet to boot. The workers were fast, efficient and friendly (even to my dog). I can't say enough about this company to do this justice. Very satisfied with my decision to give them a call."

Ronald H on September 2020

At Root Electric it is our honor to offer our customers superior service from the first telephone call to the final payment. Root Electric specializes in working directly with homeowners, business owners and facility managers in electrical construction, upgrades and service. All of our electricians are experienced and well-trained employees of root electric. Additionally, we do not sub-contract to any outside workers or companies for electrical work. Root Electric employs a dedicated sales staff to handle customer's telephone calls and to estimate projects. This insures that all telephone calls are returned in a timely manner and that all projects are accurately priced and scheduled. Additional DBA - William J Root Inc, Rootelectric. Award winning. Additional emails - [email protected], [email protected], [email protected]. Additional contact name - William Bill. Additional phones - (703) 618-5390.

"I had a new electrical line I wanted to run for a display light attached to a grandfather clock in our foyer. I also requested a switch be added to our wall panel by the front door to operate it. The job involved seeking a route for running wire behind the ceiling and drywall from our basement to the first floor of the house. The installation was complicated and obviously required a healthy amount of expertise in all respects. The work was accomplished with a minimal amount of mess (two small holes) and the quad switch panel added by our front door operates flawlessly. During the same visit they also replaced four decorative ceiling light fixtures and repaired a bad electrical outlet to boot. The workers were fast, efficient and friendly (even to my dog). I can't say enough about this company to do this justice. Very satisfied with my decision to give them a call."

Ronald H on September 2020


Avatar for ENERGY EFFICIENCY EXPERTS

ENERGY EFFICIENCY EXPERTS

4.87(
207
)

ENERGY EFFICIENCY EXPERTS

4.87(
207
)
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers

We are a full service Home Performance Contractor providing energy audits, weatherization and performance verification. Our BPI trained technicians focus our audits on solving problems, making our clients homes more comfortable and thereby reducing their utility bills.

"Energy Efficiency Experts was prompt, friendly and informative. Loved working with the owner and her team! Would definitely recommend to anyone early on in their process."

Catherine B on September 2019

We are a full service Home Performance Contractor providing energy audits, weatherization and performance verification. Our BPI trained technicians focus our audits on solving problems, making our clients homes more comfortable and thereby reducing their utility bills.

"Energy Efficiency Experts was prompt, friendly and informative. Loved working with the owner and her team! Would definitely recommend to anyone early on in their process."

Catherine B on September 2019


Avatar for THE BUILDING INSPECTOR OF AMERICA

THE BUILDING INSPECTOR OF AMERICA

4.87(
167
)

THE BUILDING INSPECTOR OF AMERICA

4.87(
167
)
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers

Prime Property Inspectors – The Building Inspector of America is a full-service home inspection and environmental testing company. Our certified home inspectors are professionals in engineering, architecture or construction and are current with emerging issues facing the home inspection industry. Our attention to detail is reflected in our comprehensive digital home inspection reports. Environmental services include evaluation and testing for radon gas, mold, volatile organic compounds, allergens, odors, electromagnetic fields and combustion by-products.

"I used this company to perform a home inspection before I bought my house. Due to its negligence and breach of contract, 9 months after I moved in, I had to replace the roof on the house. The company will do nothing to rectify the situation. They are cheats and liars that hide behind their contracts. Their inspectors take every shortcut, and they will not protect you during the home buying process. Just don’t use them."

Christina L on March 2021

Prime Property Inspectors – The Building Inspector of America is a full-service home inspection and environmental testing company. Our certified home inspectors are professionals in engineering, architecture or construction and are current with emerging issues facing the home inspection industry. Our attention to detail is reflected in our comprehensive digital home inspection reports. Environmental services include evaluation and testing for radon gas, mold, volatile organic compounds, allergens, odors, electromagnetic fields and combustion by-products.

"I used this company to perform a home inspection before I bought my house. Due to its negligence and breach of contract, 9 months after I moved in, I had to replace the roof on the house. The company will do nothing to rectify the situation. They are cheats and liars that hide behind their contracts. Their inspectors take every shortcut, and they will not protect you during the home buying process. Just don’t use them."

Christina L on March 2021

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Energy Efficiency Auditing questions, answered by experts

Fireplaces can theoretically help you save on heating bills if you lower the temperature throughout the rest of your home and heat only a single room that you occupy using the fireplace. However, in most cases, homeowners won’t save any money on heating bills. Gas and electric fireplace inserts could actually lead to a spike in your respective energy bills if you use them frequently, and if you don’t keep up with chimney maintenance and repairs, your traditional masonry fireplace could actually be a source of heat loss in the winter.

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 effect a gas fireplace has on your gas bill will depend on how often you use it, the size of the rooms you’re heating with it, and the BTUs of the fireplace itself, but generally speaking, it should only cost a few cents an hour to run it when it’s on. It will consume minimal energy when it’s “off” if you have a pilot light running constantly, but some modern gas fireplaces don’t require a constant pilot light.

STC (Sound Transmission Class) ratings tell you how well something blocks airborne noise. It’s a single number that sums up how much sound a material, like a window, can stop across regular speech frequencies. The higher the number, the better the sound reduction. A typical single-pane window hovers around STC 25 (where you can hear normal conversations), while well-sealed, double-pane options can push past STC 45 (which blocks out loud speech and most music). Just keep in mind that STC doesn’t cover everything—low rumbles like bass or thunder can sneak through—so pairing methods are always ideal for the most peace and quiet.

Expert installation optimizes insulation properties, cutting energy costs and enhancing home comfort year-round.

The Ashburn, VA homeowners’ guide to energy efficiency auditing services

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