One locked unit can be a loop problem
In a Reston building on a shared loop, a heat pump that keeps tripping often points back to flow or loop temperature. Fix the unit alone and the next one in line trips tomorrow.
Reston, Virginia
Commercial HVAC in Reston.
For commercial HVAC in Reston, 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 Reston, SwiftPro is rated 5.0 stars across 1,130 reviews and works under Virginia Class A contractor license 2705192276. We cover commercial HVAC in Reston: water source heat pumps in offices and shops around Town Center and Sunset Hills Road, plus after-hours lockouts. 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.
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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 Reston.
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 Reston
In Reston, the loop is the system.
Reston has more mid-rise office and mixed-use buildings than most of Northern Virginia, around Reston Town Center, Sunrise Valley Drive, Sunset Hills Road and the Wiehle-Reston corridor. A lot of buildings of that kind, though not all, heat and cool with water source heat pumps: many small units, one in each suite or zone, all tied to a shared water loop on the roof or in the mechanical room.
We ran into that on an after-hours call at a Reston cafe. A water source heat pump had locked out, so the space was losing its heat on a cold March night. Those units trip on a safety when the water flow, the temperature or the pressure on the loop goes off, and they stay locked until someone finds why and resets them. Resetting alone gets you a few hours. We found what tripped it, cleared it and left the unit running.
That is the thing to know about a loop. When one suite’s heat pump keeps locking out, the cause is often not the unit but the loop it shares: flow, strainers, loop temperature. A tech who only swaps the heat pump will be back. On a loop building, the tenant calls us, but the answer sometimes lives with the landlord or the building engineer, and we will say so and tell them what to look at.
Retail and restaurants in Reston’s smaller centers are more often plain rooftop units or splits, and the calls look more like anywhere else. We handle those too. If you aren’t sure what your suite runs on, a nameplate photo is enough to start.
The signs
When a business in Reston 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 Reston?
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Choosing who services it
How to pick who services a building in Reston.
Questions to ask anybody who bids on your building’s HVAC, us included.
Do they work on water source heat pumps?
Reston has plenty of them, and many companies only do rooftop units. Ask if they diagnose a lockout down to the loop, not only swap the unit.
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
Questions
Commercial HVAC questions from Reston.
Can you come after hours for a locked-out heat pump in Reston?
Yes. We have answered an after-hours water source heat pump lockout at a Reston cafe, and we run 24/7 emergency service for commercial calls. A loop or tenant-side cause is something we look for on the way.
Who fixes the water loop, me or my landlord?
Usually it depends on your lease. The heat pump in your suite is often yours to service, the shared loop the building’s. We tell you which one failed, and our commercial page has the rest.
How much does commercial HVAC work cost in Reston?
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 Reston?
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 Reston 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.