Newer building, same failure
A building under 20 years old can still have a cracked exchanger, especially on a unit that runs a kitchen’s worth of load. Age is a clue, not a clearance.
Gainesville, Virginia
Commercial HVAC in Gainesville.
For commercial HVAC in Gainesville, 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 Gainesville, SwiftPro is rated 5.0 stars across 1,130 reviews and works under Virginia Class A contractor license 2705192276. We cover commercial HVAC in Gainesville: strip retail and restaurants along Route 29, big gas rooftop units, and cracked heat exchangers caught early. 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 Gainesville.
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 Gainesville
In Gainesville, a big gas rooftop unit is the usual restaurant.
Most of Gainesville’s commercial space is newer than the rest of Prince William County, much of it built in the last 25 years: shopping centers and restaurant pads along Route 29 and Route 55, and offices near the Linton Hall corridor. Newer buildings usually mean large packaged gas rooftop units, with one unit serving a whole dining room.
On a Gainesville restaurant, we found a cracked heat exchanger on a 12.5-ton gas rooftop unit in January 2025. That unit is big enough to heat the entire dining room and often part of the kitchen. A crack lets combustion gas, carbon monoxide among it, mix with the air going to the space below, so a cracked exchanger on a gas unit is a shut-down finding.
Winter finds these. A heat exchanger has worked through a hot summer and a cold one before it splits, and the first hard-run cold days are when it fails. We’d rather find it on a maintenance visit before the dinner rush than on a call in the middle of one.
The decision after that is repair or replace. On a 12.5-ton unit the exchanger is a large part, and the right answer depends on the unit’s age and whether the rest of it is sound. You see both options in writing.
The signs
When a business in Gainesville 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 Gainesville?
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Choosing who services it
How to pick who services a building in Gainesville.
Questions to ask anybody who bids on your building’s HVAC, us included.
Will they inspect the heat exchanger, not only the filters?
On a gas rooftop unit, a good heating visit includes a look at the exchanger. Ask how they check it, and what they do when they find a crack.
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.
The technicians from SwiftPro were on time, and provided efficient pre-season servicing and inspection of our 2 commercial HVAC units. They even located our supply of air filters and changed them out.
- 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
Questions
Commercial HVAC questions from Gainesville.
What do you do when you find a cracked heat exchanger in Gainesville?
We shut the gas off to that unit and tell you what we saw. A cracked exchanger is not something to run, even for a day, until it’s fixed or replaced.
Do you service large rooftop units in Gainesville?
Yes. That includes 12.5-ton gas units. Maintenance is priced by the unit, and a heating visit includes a look at the exchanger.
How much does commercial HVAC work cost in Gainesville?
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 Gainesville?
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 Gainesville 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.