One room is always the problem
If a single Fairfax suite or back office never matches the rest of the building, the answer is sometimes a dedicated mini split, not more airflow from a unit that’s already stretched.
Fairfax, Virginia
Commercial HVAC in Fairfax.
For commercial HVAC in Fairfax, every commercial job is priced at your building, in writing, before any work. Call SwiftPro, rated 5.0 stars across 1,130 reviews, at (703) 997-9757, 24 hours a day, 7 days a week.
For commercial HVAC and refrigeration in Fairfax, SwiftPro is rated 5.0 stars across 1,130 reviews and works under Virginia Class A contractor license 2705192276. We cover commercial HVAC in Fairfax: retail rooftop units on Fairfax Boulevard, law and professional offices on split systems, mini splits for single rooms. A repair is priced once we’ve found the fault, a replacement once we’ve seen the roof, the curb and the crane access.
- Priced in writing at your building
- Our own licensed HVAC techs
- 24/7 emergency service
5.0 stars across 1,130 reviews
Three of our HVAC technicians on a commercial roof beside a new rooftop unit, panels open for startup.
Get your price in writing
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Licensed and insuredVirginia Class A contractor #2705192276
24/7 emergency serviceWe answer day or night, and we will tell you honestly when we can get there.
Our own HVAC installersA dedicated heating and cooling team, separate from our plumbers
Price in writing firstYou see every option priced before anything is ordered
How it’s priced
How commercial HVAC work is priced in Fairfax.
No two buildings are alike, so we don’t publish one number for them. More on what we cover on our commercial HVAC and refrigeration page.
Rooftop unit, split system or walk-in repair
Priced in writing at your building, before any work
Rooftop unit replacement, crane lift included
Priced per building, in writing
Spring and fall maintenance for a building
Priced per building, by the units on it
A rooftop unit replacement turns on the tonnage, the curb it sits on, and whether it goes up by crane. We look at all three before you get a number.
Maintenance is priced by the units on the building, spring for cooling and fall for heating, so the visit count matches what you actually run.
What’s different in Fairfax
In Fairfax, it’s retail roofs and professional offices.
Fairfax is a county seat, so a lot of its commercial space is professional: law offices, medical and dental suites and small firms in low-rise buildings around Old Lee Highway, Main Street and the courthouse area. Alongside them sit the big retail roofs along Fairfax Boulevard and Lee Highway, which are a different animal.
A large retail store’s roof can carry a row of packaged units, and on one we did two odd and useful jobs: replaced the zone sensors on four rooftop units, and fitted custom mesh filters to keep birds out. Birds nest in intakes and condenser coils on big flat roofs, and a unit gasping through a nest looks exactly like a failing compressor. Mesh is cheaper than a compressor.
The offices run quieter equipment. We’ve worked on law offices in Fairfax with split systems from around 2000, still running on R-22. At that age the question is rarely whether the system works today; it’s what a leak does when the refrigerant is no longer made. We lay out the repair next to the replacement so the partners aren’t surprised by a July failure.
Fairfax also has the room with no ductwork: an add-on office, a server closet, a back room the main system never reached. For one commercial space here we installed a 30,000 BTU Mitsubishi mini split, which cools or heats that one room without touching the rest of the building. Wall-mounted, ductless and sized to the room.
The signs
When a business in Fairfax needs the HVAC tech.
The rooftop unit trips or blows warm
A rooftop unit that short-cycles, trips its breaker or blows warm on a hot afternoon usually has a failing compressor, a bad capacitor or a coil choked with dirt. Caught early it’s a repair, not a crane day.
The walk-in won’t hold temperature
Virginia’s food code wants cold food held at 41°F or below. A walk-in drifting above that, frost on the evaporator or fans that stopped spinning means a call now, before the inventory goes.
Need commercial HVAC and refrigeration in Fairfax?
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Choosing who services it
How to pick who services a building in Fairfax.
Questions to ask anybody who bids on your building’s HVAC, us included.
Will they look at the roof, not just the thermostat?
On a Fairfax retail roof, ask for a walk across all the units: sensors, filters, coils and intakes. Birds and debris cause more calls than most people expect.
Do they put the price in writing before the work?
On a commercial job the number should be on paper before anyone touches the unit, with the parts, labor and any crane spelled out. A time-and-materials surprise is the thing to avoid.
Can they cover both the rooftop units and the walk-in?
One company for the comfort cooling, the heat and the refrigeration means one call when something stops. Ask whether the same crew handles all three.
Two of our crew going over a work order before the day's calls.
From our Google reviews
What our customers say.
5.0 stars across 1,130 reviews. Read them on our reviews page.
Thank you to Moises and his team for quickly and efficiently responding to my request for pre-season servicing of my commercial HVAC units.
- 5.0stars across 1,130 reviewsHow we count them
- ABBB Accredited, A ratingCheck it on bbb.org
- 2026Voted a Nextdoor Neighborhood Faves winner two years running: 2026 in 30 Northern Virginia neighborhoods, 2025 in Emerald Chase (Herndon) and Hunters Run (Chantilly)See it on Nextdoor
- #1BusinessRate Best of 2026: the top-ranked heating contractor in Fairfax, VirginiaSee our BusinessRate score
- Class AVirginia contractor, license #2705192276Look it up with DPOR
Where we work
Commercial HVAC and refrigeration in every Northern Virginia town we serve
Next door to Fairfax: Annandale, Springfield, Reston, Herndon and Chantilly.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Every town on one page
Questions
Commercial HVAC questions from Fairfax.
Do you service older R-22 split systems in Fairfax?
Yes, including law office systems from around 2000. We’ll price the repair and a replacement side by side. More on the commercial HVAC page.
Can one room in a commercial building get its own system?
Yes. A ductless mini split heats and cools one room on its own, and we’ve put a 30,000 BTU Mitsubishi into a Fairfax commercial space.
How much does commercial HVAC work cost in Fairfax?
It’s priced per building, in writing, before any work. A repair is priced once we’ve found the fault; a rooftop unit replacement once we’ve seen the tonnage, the curb and the crane access.
Do you do emergency commercial HVAC in Fairfax?
Yes, 24/7 emergency service for rooftop units, split systems and walk-ins. Call (703) 997-9757 and tell us what’s down.
Ready when you are
Get your building’s HVAC sorted.
Call, or send the form at the top. We come out, find the fault or measure the job, and you get the price in writing before any work.
SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
SwiftPro Plumber & Water Heaters
4200 Lafayette Center Dr, Suite N, Chantilly, VA 20151
Virginia Class A contractor license #2705192276
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Fairfax and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 1,130 reviews on Google, Angi, Yelp, the BBB and Facebook. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
From SwiftPro Heating, Cooling & Plumbing in Chantilly. Housing figures are the Census Bureau’s American Community Survey, 2020 to 2024, for each place named; permit, water and sewer facts link to each office’s own page and were checked in September and October 2026.