Serving Ashburn, Leesburg, Sterling, Aldie, South Riding, Purcellville, Round Hill, Lovettsville, Loudoun County, Hamilton and beyond
HVAC Service Loudoun County
Air Treatment Heating & Cooling delivers exceptional HVAC services designed to maintain optimal temperature control and air quality in your space. Our dedicated team offers expert diagnostics, maintenance, and repair services, ensuring your HVAC system operates at its best, regardless of the season. At Air Treatment Heating & Cooling, we focus on reliability, from scheduled tune-ups to emergency repairs, using state-of-the-art technology to enhance your system’s performance and durability. Trust our skilled HVAC service technicians to provide solutions that not only meet your immediate needs but also contribute to reducing your energy bills.
Experience unparalleled HVAC service with Air Treatment Heating & Cooling. Call us at (703) 270-0881 for professional assistance that keeps you comfortable year-round.
Loudoun County HVAC Services Call for More Information Today!703-270-0881
Very appreciative of his service each and every time we specifically request him.
Margo Zoian
J"Timely and Thorough Service and Repairs"
They always provide timely and thorough service and repairs, staff is respectful and knowledgeable, and pricing is fair.
Jennifer McLaughlin
S"Courteous, Knowledgeable, and Efficient"
Will and his team are courteous, knowledgeable, and efficient.
Steve Kaltenbaugh
L"The Best Service"
Very professional and so kind and caring.
Louise Lighthart
P"Service Was Excellent"
The service was excellent.
Petra Engle
M"The entire operation is top notch"
The entire operation at Air Treatment is top notch.
Mark Stahl
F"Beyond My Expectation for Excellent Services"
No hype, no hard sell, but a common-sense approach to identifying our system and its overall needs.
Frank Biviano
K"Consistently Great Experience"
The staff and technicians are always respectful, professional, knowledgeable, and show up on time.
Khadijah Alibhai
J"Very pleased we chose Air Treatment Co."
I now have a brand-new set of systems that work beautifully, along with a great team of knowledgeable, skillful, and considerate technicians.
Joe Oz
e"Always on Time and Courteous"
They have been doing our inspections and maintenance since. Are always on time and courteous and don't push to upsell.
elliot norman
D"Always Great Service"
Always a great service from Air Treatment.
Dan Cusimano
P"I Highly Recommend Air Treatment Heating & Cooling"
They made the entire process easy from start to finish.
Paula Ewen
S"Very Pleased With the Service"
Steve from Air Treatment and Heating & Cooling came on time and was very courteous.
Squad 137
S"Very Pleased With the Service"
I was very pleased with the service.
S AP Martin
P"Fantastic Service"
These are very trustworthy people.
Payam Vahid
J"High Quality Service and Support"
They offer high quality service, professional technicians, and outstanding customer support.
Joe Owner
K"The Experience Was Excellent"
It was genuinely refreshing to deal with someone who clearly cares and takes pride in the work.
Kafia Sharmarke
C"Service Has Been Wonderful"
The service has been wonderful with all the technicians we've had over the years.
Catherine
W"Tremendously Satisfied for 5 Years"
I’ve always been tremendously satisfied with their services. Their technicians do a superb job!
Will Gunn
M"Always a Great Experience"
We trust the techs to be honest, friendly and do excellent work.
Mark Oldfield
M"They did a fantastic job"
They did a fantastic job and they were by a significant margin less expensive.
Michael Collins
C"Consistently the best."
Consistently the best.
Chris and Melinda Gren
S"Very professional, reliable, and friendly people!"
We have been using them for over ten years and have had nothing but positive experiences.
Sharon Edelmann
A"I highly recommend this company."
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.
Alexandra Wagner
J"We highly recommend Air Treatment."
We've always been very pleased with the company.
John Piper
A"We Can't Recommend This Company Enough!"
Great service and each experience we have had with them has been so positive.
Alya Salon
M"Kyle came for our annual HVAC check"
We are long time customers of Air Treatment.
MaryBeth Stewart
P"Excellent service from JP Poczatek!"
He answered all my questions and also provided great explanations of what he did.
Philip Ong
M"Chris is very knowledgeable and easygoing."
We received a quote from Chris at Air Treatment, and it was a very competitive one.
Mauricio Anaya
S"Five Stars Across the Board"
Always professional, always skilled, and always on time.
Steve
Outstanding service once again
Outstanding service once again from our technician Nabil. Very appreciative of his service each and every time we specifically request him. Nabil continues to be most efficient in servicing our needs. Our sincere thanks to him.
Margo Zoian
Timely and Thorough Service and Repairs
We have been working with Air Treatment H&C for many years. They always provide timely and thorough service and repairs, staff is respectful and knowledgeable, and pricing is fair.
Jennifer McLaughlin
Courteous, Knowledgeable, and Efficient
Will and his team are courteous, knowledgeable, and efficient. We've used other companies in the past with mixed results, but we trust Chamberlain.
Steve Kaltenbaugh
The Best Service
The best service. Everyone should have a yearly maintenance contract. Very professional and so kind and caring. Love this company.
Louise Lighthart
Service Was Excellent
The problem was quickly taken care of and the service was excellent.
Petra Engle
The entire operation is top notch
The entire operation at Air Treatment is top notch. Pricing (paramount), scheduling, timing, technicians—knowledgeable, polite, tidy, informative. Amazing.
Mark Stahl
Beyond My Expectation for Excellent Services
This was the first meeting with Air Treatment personnel that went beyond my expectation for excellent services. Dillon was an HVAC system font of knowledge, explaining in detail the HVAC cleaning system and benefits. No hype, no hard sell, but a common-sense approach to identifying our system and its overall needs.
Frank Biviano
Consistently Great Experience
Consistently great experience with Air Treatment Company for HVAC maintenance. The staff and technicians are always respectful, professional, knowledgeable, and show up on time.
Khadijah Alibhai
Very pleased we chose Air Treatment Co.
After many years with one of the largest heating/AC service providers available in the Northern VA area - who got too big to provide good customer service to the little guy - I'm very pleased that we chose the Air Treatment Co. I now have a brand-new set of systems that work beautifully, along with a great team of knowledgeable, skillful, and considerate technicians. Patrick B., one of the team, just provided us with our springtime maintenance; he did a great job and is welcome back anytime! Thanks, Patrick.
Joe Oz
Always on Time and Courteous
We have been using Air Treatment Company for almost 10 years. They took us through the install of gas to the house, when we changed to a gas furnace and water heater. They have been doing our inspections and maintenance since. Are always on time and courteous and don't push to upsell.
elliot norman
Always Great Service
Always a great service from Air Treatment, have had them for 27 years.
Dan Cusimano
I Highly Recommend Air Treatment Heating & Cooling
I highly recommend Air Treatment Heating & Cooling. The staff and technicians are customer-focused, knowledgeable, professional, and customer-friendly. I researched companies and found Air Treatment Heating & Cooling to provide the BEST cost, system, and overall package for my HVAC unit. They made the entire process easy from start to finish. Will be a long-time customer and hope you are, too!
Paula Ewen
Very Pleased With the Service
Steve from Air Treatment and Heating & Cooling came on time and was very courteous when entering, placed shoe covers on, and went straight to work servicing my unit in an efficient and timely manner. I was very pleased with the service. I pay for this service for two visits a year, and it is very reasonable.
Squad 137
Very Pleased With the Service
Steve from Air Treatment and Heating & Cooling came on time and was very courteous when entering, placed shoe covers on, and went straight to work servicing my unit in an efficient and timely manner. I was very pleased with the service. I pay for this service for two visits a year and it is very reasonable.
S AP Martin
Fantastic Service
Fantastic service. Steve was great. These are very trustworthy people. I’m glad that I was recommended to them.
Payam Vahid
High Quality Service and Support
They offer high quality service, professional technicians, and outstanding customer support. I've tried other providers, but Air Treatment has consistently been my preferred choice!
Joe Owner
The Experience Was Excellent
My wife found Air Treatment Heating and Cooling when we needed a new HVAC system installed in our condo, and the experience was excellent. Shortly after, I had an urgent need at our single-family home to inspect the system and rebalance airflow. I spoke with Dan (the owner), and it was genuinely refreshing to deal with someone who clearly cares and takes pride in the work.
Dan sent Mike out, and Mike was fantastic—easy to talk to, knowledgeable, and he got everything dialed in. I even learned we have three dampers I didn’t know existed. 🤷♂️
It’s a real pleasure working with a company that’s owner-run and service-focused—not the private-equity “roll-up” model.
Kafia Sharmarke
Service Has Been Wonderful
I continued with Air Treatment Heating and AC service since we bought the house 20+ years ago. The service has been wonderful with all the technicians we've had over the years. My units (1 furnace and 1 AC) have lasted their full life thanks to the annual service provided by Air Treatment. Highly recommend them!
Catherine
Tremendously Satisfied for 5 Years
I’ve been working with Air Treatment Company for about 5 years, and I’ve always been tremendously satisfied with their services. Their technicians do a superb job! I had my winter inspection today, and Lilly was great! She was clear and carefully explained what was going on with my unit.
Will Gunn
Always a Great Experience
Always a great experience with ATH&C! We trust the techs to be honest, friendly and do excellent work. Highly recommend!
Mark Oldfield
They did a fantastic job
They did a fantastic job and they were by a significant margin less expensive than the five other bids I got for the same top-of-the-line equipment.
Michael Collins
Consistently the best.
Consistently the best. The service from the tech to the customer service. Keep up the amazing work, team!
Chris and Melinda Gren
Very professional, reliable, and friendly people!
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
I highly recommend this company.
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
We highly recommend Air Treatment.
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
We Can't Recommend This Company Enough!
We can't recommend this company enough! Great service and each experience we have had with them has been so positive.
Alya Salon
Kyle came for our annual HVAC check
We are long time customers of Air Treatment. Kyle came for our annual HVAC check and maintenance. He is great.
MaryBeth Stewart
Excellent service from JP Poczatek!
Excellent service from JP Poczatek! He answered all my questions and also provided great explanations of what he did.
Philip Ong
Chris is very knowledgeable and easygoing.
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
Five Stars Across the Board
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.
At Air Treatment Heating & Cooling, we’ve been keeping Northern Virginia homes comfortable for more than 50 years. From fast emergency repairs to expert system upgrades, we focus on honest advice, quality workmanship, and friendly service you can rely on season after season.
Why Homeowners Choose Us:
Over 50 years of local, family-owned experience
NATE-certified, highly trained technicians
Fast response for repairs and emergencies
Upfront, honest pricing with no surprises
Customized comfort and indoor air quality solutions
Top-rated service across Fairfax and Northern Virginia
Honest Pricing And NATE-Certified Technicians
Upfront quotes and highly trained pros who get it right first time.
Tailored Comfort Solutions For Your Home
Custom HVAC installs, repairs, and maintenance for any home.
Trusted Local HVAC Experts For 50+ Years
Family-owned, serving Fairfax and Northern Virginia since 1969.
Fast, Reliable HVAC When You Need It Most
Prompt emergency repairs and service to restore comfort fast.
Meet the Air Treatment Heating & Cooling Team
At Air Treatment Heating & Cooling, our team has been keeping homes across Northern Virginia comfortable for more than 50 years. Based in Vienna, we’re a family-owned company made up of NATE-certified technicians and friendly support staff who truly care about our neighbors in Fairfax, Reston, Herndon, McLean, Ashburn, Great Falls, Oakton, and beyond.
We work quickly and carefully, whether we’re handling an emergency repair, seasonal maintenance, or a full system replacement. Every estimate is explained upfront, with honest pricing and recommendations tailored to your home, budget, and indoor air quality needs. From your first call to the final walkthrough, we’re focused on doing the job right the first time and earning your trust for years to come.
Regular maintenance, proper insulation, sealing leaks, and upgrading to energy-efficient models can significantly reduce energy costs over time.
How long do HVAC systems typically last?
With proper maintenance, HVAC systems can last between 15 to 25 years. Lifespan varies based on usage, maintenance, and environmental factors.
What are signs my HVAC needs repair?
Common signs include unusual noises, inconsistent temperatures, increased energy bills, or poor airflow. If you notice any of these, consider a professional inspection.
What type of filters should I use?
The best filter depends on your system, but generally, higher MERV ratings mean better filtration. Consult your HVAC technician to choose the best option for your needs.
Baylee Alarcon Dispatcher
Crystal Young Client Services Consultant
Humaira Aslam Client Services Consultant
Elmer Ramirez Moya Service Technician
Dan Simpson Owner
Jim Griffin Owner
Philip Oliver Owner
Cameron Young Service Manager
Chris Hunt Comfort Consultant
Justin Hopeck Comfort Consultant
Lisa Rudolph Install Coordinator
Maddy Morgan Client Services Consultant
Sarah Stock Office Manager
Shawn Kelly Growth & Process Coordinator
Sumaiya Aslam Assistant Office Manager
Susan Felgar Client Services Consultant
Taylor Delgado Marketing Manager
Brendan Allen Lead Install Technician
Phu Do Lead Install Technician
Ted Kim Lead Install Technician
Van Luong Lead Install Technician
Andres Dell'Agostino Install Technician
Angel Castro Install Technician
Bao Nguyen Install Technician
Ryan Mercier Install Technician
Trung Nguyen Install Technician
Dee Dordevic Service Technician
Dylan Thornton Service Technician
Kyle Sackett Service Technician
Lilly Castillon Service Technician
Mike McEwan Service Technician
Steve Patten Service Technician
Trevor McMillen Service Technician