Zones that don’t agree
In a Herndon office with VAV boxes, one corner running hot while the rest is comfortable often means a box or sensor, not the rooftop unit. We check the controls before anyone prices a compressor.
Herndon, Virginia
Commercial HVAC in Herndon.
For commercial HVAC in Herndon, 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 Herndon, SwiftPro is rated 5.0 stars across 1,130 reviews and works under Virginia Class A contractor license 2705192276. We cover commercial HVAC in Herndon: rooftop units on the office and flex buildings off Elden Street and the Toll Road, building automation, restaurant walk-ins. 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 Herndon.
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 Herndon
In Herndon, the big rooftop units run on a computer.
Herndon’s commercial buildings lean toward offices and light industrial space in the parks around Elden Street, Van Buren Street and the Dulles Toll Road, with restaurants and small shops stacked along the older strips. The offices are where the equipment gets bigger, and where a rooftop unit usually answers to something other than a thermostat.
We service a pair of rooftop units on one Herndon building, a 15-ton and a 17.5-ton, both tied into a building automation system with VAV boxes in the ceiling. When a call like that comes in, the unit is often fine and the control side is the problem: a box stuck closed, a sensor reading wrong, a schedule telling the roof to sleep. One visit there started as a smoke smell.
The other end of the scale is the old single unit. We replaced a 2007 rooftop unit in Herndon, a 3-ton R-22 system, with a Carrier 48FE set by crane in July. At that age and on that refrigerant, a repair buys a summer and nothing more. The crane, the curb and the electrical are all in the written price so the owner sees one number for the whole lift.
Restaurants here are a different clock. A Herndon restaurant’s walk-in cooler had its condensing unit on the roof, and when it failed over a weekend we got it running again with temporary parts so the food stayed cold until the right ones arrived. That’s what 24/7 emergency service is for: the cooler doesn’t care that it’s Saturday.
The signs
When a business in Herndon 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 Herndon?
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Choosing who services it
How to pick who services a building in Herndon.
Questions to ask anybody who bids on your building’s HVAC, us included.
Can they work on a building automation system?
If your Herndon roof is on a BAS, ask whether the tech can read the controller and the VAV boxes, not just the unit. A good number of calls end at a sensor.
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 Herndon.
Do you replace older rooftop units in Herndon?
Yes, by crane when the roof calls for it. We replaced a 2007 R-22 rooftop unit in Herndon this summer, and the price covers the crane and curb. See the commercial HVAC page for what else we cover.
Will you come out for a restaurant cooler on a weekend?
Yes. Walk-in calls are part of 24/7 emergency service, and when the right part isn’t on the truck we’ll hold the box cold with a temporary fix.
How much does commercial HVAC work cost in Herndon?
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 Herndon?
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 Herndon 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.