Serving Ashburn, Leesburg, Sterling, Loudoun County and beyond Heat Pump Installation Loudoun County

I would highly recommend this company Dec 9, 2025

I was looking to replace my entire HVAC system and Air Treatment was one of the 5 HVAC companies I reviewed (all highly rated). From the start, I was impressed. Chris Hunt, the sales representative, was professional and thorough in providing the options for my new system. Chris also provided the estimates in a timely manner and was very responsive to my many follow-on questions. The quotes he provided were competitive (or lower) with the other companies I interviewed. Given their reputation, Chris's professional and responsive support, competitive pricing, and their other add-ons (longer labor warranty and 2-year free maintenance), I chose to go with Air Treatment. After signing the contract, we set up a time for the installation, which I had to later change due to a conflict. They were very accommodating with the change. Also, they were very accommodating when I had to ask them to pause after they removed the old system so that the duct cleaning company could conduct mold remediation in the ductwork. The two installers, Brendan and Andres, were very pleasant and professional and patiently took the time to answer any questions I had. The final product looks great and operates well. During the installation, one of the owners, Dan, came by to deliver a part. I had the opportunity to speak with him. Very friendly and helpful with some questions I had. Last item: I had to communicate with the office staff several times (to arrange for an installation date, the pause for the mold remediation, and to discuss some county inspection items). In each case, the people I spoke with were very friendly and accommodating. I would highly recommend this company to anyone who is looking for an HVAC installation or service.

Rob F

The whole process was efficient and professional. Dec 9, 2025

Trevor alerted us to a problem with the furnace and recommended replacement. Phil came out and gave us a detailed proposal. Ryan and Phu installed the new system. The whole process was efficient and professional.

David Smith

ATC spent the most time Dec 9, 2025

Got 4 estimates for replacing our HVAC with a newer heat pump. ATC spent the most time and offered the most reasonable suggestions for improvements.

Chip Larson

I have no hesitation in recommending these good people. Dec 8, 2025

We lost our heat late on a Friday afternoon. The technician came out after hours, about 5:30. He worked quite methodically and diligently until he was able to get our heat back on. He also had a nice friendly disposition and I enjoyed his sense of humor. It would’ve been a very cold weekend without his help. I have no hesitation in recommending these good people.

Michael McDermott

Very knowledgeable and helpful technicians. Dec 8, 2025

I had an AC unit and a heat pump installed in the last two years. All the Air Treatment technicians I interacted with were very knowledgeable and helpful.

D Z

Consistently the best. Dec 4, 2025

Consistently the best. The service from the tech to the customer service. Keep up the amazing work, team!

Chris and Melinda Gren

What an outstanding, technically competent, polite and efficient young gent! Dec 1, 2025

"JP" just completed my bi-annual HVAC inspection ~ what an outstanding, technically competent, polite and efficient young gent! Kudos and compliments to the Air Treatment team 👏 👍 👌!!

Birt Webley

I couldn’t be happier with the service. Oct 31, 2025

I recently had additional HVAC vents installed in my basement and couldn’t be happier with the service. The technicians arrived right on time and were extremely polite and professional throughout the entire process. They completed the installation quickly without cutting corners, and their attention to detail was impressive. What stood out most was that, after finishing the work, they took the time to walk me through everything they had done and answered all my questions. It was reassuring to see the quality of the installation firsthand. Overall, it was a great experience—fast, courteous, and thorough. Highly recommend!

Richard Miller

Very professional, reliable, and friendly people! Oct 31, 2025

This is a team of very professional, reliable, knowledgeable, and friendly people! We have been using them for over ten years and have had nothing but positive experiences with each person and each service.

Sharon Edelmann

We highly recommend Air Treatment. Oct 28, 2025

The Air Treatment Company has performed all of our HVAC and related installations and maintenance for more than 30 years, and we've always been very pleased with the company. They came through again for us when our HVAC system stopped working and an error message came up on our thermostat. We called Air Treatment, and a technician came out and identified the problem: the control unit had failed. Air Treatment ordered a replacement, and in less than a week our HVAC system was up and running again. An added bonus was that the unit was still under warranty, so the cost to us was minimal. Needless to say, we highly recommend Air Treatment.

John Piper

I highly recommend this company. Oct 28, 2025

We have used Air Treatment for all our heating, cooling, and water systems for many years, and we are always very pleased with their services. I highly recommend this company. They are professional, customer friendly, and provide helpful expertise.

Alexandra Wagner

Lilly was a pleasant person to communicate with. Oct 24, 2025

Lilly was a pleasant person to communicate with. Explained to me what the problem was and took time to find out the problem. Thanks for your knowledge, expertise, and curiosity. Elizabeth

elizabeth mekonnen

Technician was extremely courteous. Oct 19, 2025

Technician was extremely courteous and was delighted that he reported everything was in good working order.

Colette LaForest

They've earned a customer for life. Oct 17, 2025

I’ve been using Air Treatment Company for several years and have always been very happy with their service. Their staff are polite, knowledgeable, and always on time, and they keep me informed every step of the way. After a recent service, my unit wasn’t working properly and I wasn’t satisfied with how things turned out. After I expressed this to them, the owner personally called me to make it right and fixed my compressor free of charge. He called me every step of the way to give me updates and keep me informed. I was blown away by his dedication and genuine care for his customers. He and his team went above and beyond to ensure everything was perfect and they’ve earned a customer for life. I highly recommend Air Treatment Company!

Eva Everett

He and his team went above and beyond Oct 17, 2025

I’ve been using Air Treatment Company for several years and have always been very happy with their service. Their staff are polite, knowledgeable, and always on time, and they keep me informed every step of the way. After a recent service, my unit wasn’t working properly and I wasn’t satisfied with how things turned out. After I expressed this to them, the owner personally called me to make it right and fixed my compressor free of charge. He called me every step of the way to give me updates and keep me informed. I was blown away by his dedication and genuine care for his customers. He and his team went above and beyond to ensure everything was perfect and they’ve earned a customer for life. I highly recommend Air Treatment Company!

Eva Haley

We Can't Recommend This Company Enough! Oct 16, 2025

We can't recommend this company enough! Great service and each experience we have had with them has been so positive.

Alya Salon

Excellent service from JP Poczatek! Oct 15, 2025

Excellent service from JP Poczatek! He answered all my questions and also provided great explanations of what he did.

Philip Ong

Kyle came for our annual HVAC check Oct 15, 2025

We are long time customers of Air Treatment. Kyle came for our annual HVAC check and maintenance. He is great.

MaryBeth Stewart

Chris is very knowledgeable and easygoing. Oct 14, 2025

We received a quote from Chris at Air Treatment, and it was a very competitive one. Chris is very knowledgeable and easygoing. Although we did not hire Air Treatment for our specific project, we are recommending them as a great option.

Mauricio Anaya

They did a thorough job checking my system Sep 22, 2025

I had my system replaced a year ago. This was my annual maintenance. They did a thorough job checking my system to make sure everything is working correctly as we go into winter. Thanks again.

Mike Jones

No Issues with Brand New Rheem HVAC Sep 22, 2025

So far, so good. I bought a brand new Rheem HVAC system from this company a year ago and have not had any issues. They perform an annual maintenance checkup on the HVAC and it’s been running smoothly since they installed it. I used Air Treatment Heating & Cooling based on a recommendation from my neighbor who used them for their new HVAC purchase and installation in their home.

Alfred Waite

Five Stars Across the Board Sep 22, 2025

Always professional, always skilled, and always on time. Nobody could ask for a better company and team of experts for everything from HVAC purchasing to installation to maintenance. Five stars across the board.

Steve

Refreshing to work with an honest company Sep 7, 2025

They were the only company that actually took the time to measure carefully and size the system out of four proposals. They even recommended a system that wasn’t the most expensive type, which they knew was overkill and unsuited for my type of home. The others did the opposite. It’s refreshing when you can work with a company who’s not just trying to make the most they can out of you just because they can. Many neighbors recommended them, and they have had years of experience with them. Five stars!

Chris Rodriguez

Did a nice, neat, clean job. Aug 27, 2025

The service tech came. It was very good and personable and did a nice, neat, clean job.

corby cleveland

Always going above and beyond Aug 20, 2025

Always on time, beyond professional, and so knowledgeable with how to best use our system and properly maintain our units. Always going above and beyond with the attention to detail and so friendly to deal with. Thank you for being so reliable and helpful — shoutout to Lilly, she’s the best!!!

Catherine Lee

Mike is an absolute expert on HVAC Aug 18, 2025

Prompt, excellent service. Mike is an absolute expert on the functioning of our commercial HVAC system. We have relied on him for almost a decade. Air Treatment Company has amazing technical support and customer service.

Aromatic Spice Blends

Great customer service Aug 16, 2025

Great customer service. I had used Air Treatment twice, very happy with the service.

Heidi ARDESTANI

As always, Mike did an amazing job. Aug 15, 2025

As always, Mike did an amazing job. Explained everything in regards to the 'health' of the air conditioning system at my parents' home. As long as Mike is available, we will continue to use Air Treatment! On behalf of my home, my parents' home, and my office, thank you.

Richard Forbes

Dylan was great. Aug 15, 2025

Dylan was great. On checking the unit on the roof, he noted that birds had pecked away the insulation on the wires leading to the unit. He came back later that day and fixed the problem with bird-proof insulation.

John Gorrell

AirTreatment is a great company! Aug 13, 2025

AirTreatment is a great company! Their technicians have been super helpful and full of knowledge. Highly recommend!

antonia chelpon