Open 24/7 for emergencies
A furnace tune-up in Dunn Loring is $99 a system. Nearly every 1990s and 2000s house in 22027 is on gas.
Get your price in writing
Send this and the office calls or texts you back to set a time.
We’ll call or text this number about your request. By sending it you agree to our terms and privacy policy.
Rather talk now? (703) 997-9757
5.0 stars across 1,132 reviews
Two of our heating technicians in a Northern Virginia basement, beside an open gas furnace.
Licensed and insuredVirginia Class A contractor #2705192276
24/7 emergency serviceOften same-day, 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
What it costs
$99 for one furnace, anywhere we work. The tech checks the gas pressure, the temperature rise, the safeties and the sequence of operation, which is the order the furnace lights, heats and shuts down in. A repair it turns up gets a written price first, and you decide.
Furnace tune-up, one system
$99
Heat pump, boiler or ductless mini split tune-up, one system
$99
Comfort+ membership, a heating maintenance visit every fall included
$199 a year
It’s priced per system, so a house with a second furnace for the upstairs is two tune-ups. A heat pump, a boiler or a ductless mini split is the same $99 a system.
With Comfort+ membership, $199 a year or $20 a month covers four visits every year: a heating maintenance visit in the fall, a cooling maintenance visit in the spring, a dryer vent cleaning, and a water heater flush with a sewer camera inspection. We book each one when it’s due.
What’s different in Dunn Loring
Vienna’s co-op weather station, 3.6 miles west at about the same height, logs 4,931 heating degree days a year against 964 cooling degree days: the heat does roughly five times the work of the air conditioning. January there averages a low of 23.4 degrees, 99 nights a year reach freezing, and about 4 drop to 10 or below.
Most of that heat burns gas. Fairfax County’s books show gas connected at 546 of the 732 homes in 22027, and at 326 of the 334 detached houses built from 1990 through 2009, each over a full basement where the furnace usually stands. Kings Glen, on Foxmoor Drive, went up from 1985 to 1988, so most of its furnaces are likely replacements by now. Morgan Chase and Arden Oaks date from 2000 to 2003, and some of their basements may still hold the builder’s furnace.
The 102 townhouses, at the Regal Oaks on Journet Drive and Laing at Governors Square on Harithy Drive, are all gas over full basements, so the furnace is usually downstairs, not in an attic. About 2 in 100 owner homes in the ZIP burn propane by the Census count, and a propane furnace gets this same visit with its burner pressure set for propane.
The 1970s streets heat differently. Of the 81 detached houses built here that decade, 70 have no gas on the county’s records, including all 20 at Tysons Grove on Arden Court. Those usually run a heat pump, the same $99 a system. Cold snaps test them: January 2025 brought several single-digit nights, and late January 2026 Extreme Cold Warnings on the 27th, 30th and 31st, when a heat pump leans hard on its electric backup heat.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIP 22027 as a whole: every Dunn Loring address. The Dunn Loring Census place is bigger: about three in four of its homes have Vienna mail.
When it’s worth doing
A high-efficiency furnace breathes through two plastic pipes on an outside wall, and a drift over them can shut it down on a safety switch. The January 2016 blizzard dropped 23 to 31 inches across Fairfax County. Clear those pipes first; if it still won’t light, call us.
That’s the night every furnace in town gets asked to work at once. A tune-up in the fall finds a weak part while you still get to choose when it’s fixed.
The home inspector ran the heat for a minute. A tune-up runs it through a full cycle with the panel off, and tells you what the last owners left you.
Safety and paperwork
Fairfax County Fire and Rescue says to have the heating system cleaned and checked by a professional every year, and to keep anything that burns at least three feet from the furnace and the water heater. Source.
Fairfax County Fire and Rescue names a faulty gas furnace or water heater as a carbon monoxide source, says to have gas appliances inspected every fall, and to put a CO alarm on every floor. Source.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who tunes it up
Questions to ask anybody who quotes you, us included.
On the all-electric 1970s streets, backup heat carries the house through a night like January 31, 2026. Ask whether the tech switches it on and checks it heats.
Ask before anyone comes out. Gas pressure and temperature rise are readings on a meter, so a real tune-up has numbers in it, not just a look at the filter.
Some tune-ups end in a list. Ask which items are failing now, which can wait a season, and what each one costs, before you agree to any of it.
Two of our crew going over a work order before the day's calls.
From our Google reviews
5.0 stars across 1,132 reviews. Read them on our reviews page.
Elvis Diaz from SwiftPro did a fantastic job of inspecting my HVAC system, he explained everything in a very professional way, for example, he recommended the right filter type to use. It is a job well done.
Where we work
Next door to Dunn Loring: Vienna, Falls Church, McLean, Annandale and Oakton.
Questions
A gas furnace needs electricity for its igniter, inducer fan and blower, so it sits dark through an outage, like the countywide ones snow-loaded trees and lines caused in the February 2010 storm. If it tries to light after the power returns and gives up, the vent pipes may be buried or a safety may have locked it out. Clear the pipes, then call us.
Not early in the month. At the Vienna station half of years see the first freezing night by October 29. A September or October visit finds a tired igniter or a sluggish inducer while the house can still get by for a night.
$99 for one furnace, and the same for a heat pump, a boiler or a ductless mini split. If it turns up a repair, you get the price in writing before any work, and you decide.
No. The furnace tune-up is its own visit at $99. The Heating Check and the Clean Heat deep clean, the one that takes the blower wheel out and cleans it, are separate offers with their own terms on our Clean Heat page.
Ready when you are
Call, or send the form at the top. One furnace is $99, and anything it needs gets a written price before any work.
SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
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 Dunn Loring and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 1,132 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.