Open 24/7 for emergencies
A furnace tune-up in Delaplane is $99 a system. Here that usually means propane: it heats 228 of the 424 owner homes in 20144.
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 Delaplane
The Census counts zero owner homes in ZIP 20144 heating with utility gas, so a gas furnace in Delaplane burns propane from a tank the supplier fills. Most furnaces leave the factory set up for natural gas and get a conversion kit for propane, with a tag on the cabinet saying it was done. The tune-up reads the pressure at the burners against the propane figure on that tag, then follows the furnace from ignition to shutdown.
More of Delaplane went up in the 1980s than in any other decade: 165 owner homes, close to four in ten. A furnace from that build would be near forty now, so the one heating those houses is usually the second or third, set onto ductwork sized for the first. When a newer furnace and older ducts don’t agree, it shows in temperature rise, the gap between the air coming back to the furnace and the air leaving it. The rating plate lists the right range, and the tech writes down where yours lands.
The village sits about 450 feet up on Goose Creek, between Lost Mountain to the north-northwest and Little Cobbler Mountain to the south-southwest, and the ZIP climbs from there toward Sky Meadows State Park on the east side of the Blue Ridge. NOAA’s nearest long record, a Warrenton station at 500 feet, averages about 13 days a year when the high stays at freezing or below. Mount Weather, on the ridge ten miles north, averages a January low of 22 and a last spring freeze near April 17, about a week behind the valley. A house up the slope heats longer than one by the creek.
Last winter tested all of it. Late January 2026 brought Extreme Cold Warnings to Northern Fauquier, and at 5:51 on the morning of February 1 a station the Weather Service lists as Delaplane logged a wind chill of zero. Wind takes the power out here too: NOAA’s records list trees and wires down near the village in 2012, 2023 and 2025. If the lights come back after an outage and the furnace doesn’t, check the thermostat screen, the breaker and the switch on or beside the furnace. If it still won’t light, call us after the storm and we’ll check the whole system.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIP 20144 as a whole: every Delaplane address.
When it’s worth doing
That usually points at the flame sensor, the safety that proves there’s a flame before the gas keeps flowing. Coated over, it can’t see the flame, so the furnace shuts the gas off and retries until it locks out. It’s one of the safeties a tune-up tests, before a cold night finds it.
Propane runs at a different gas pressure than natural gas, so the tune-up checks yours against propane’s numbers.
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.
Safety and paperwork
Fauquier County Fire Rescue takes requests for help getting smoke and carbon monoxide alarms through a form on its Public Education page. 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.
Ask whether the tech checks the conversion tag and reads the burner pressure against the propane figure. A furnace burning propane on natural gas settings runs too rich, and soot around the burners is often the first sign.
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.
Quick response, Elvis was knocking my door in a couple of hours after my call to the office. He did full inspection for both HVAC units, and answered all my questions. Both systems are working well. I always have very pleasant experience with SwiftPro
Where we work
Next door to Delaplane: Rectortown, Upperville, Marshall, The Plains and Orlean.
Questions
About 127 owner homes here heat with electricity, usually a heat pump, and an ice storm like February 2016’s, two to three tenths of an inch across northern Fauquier, can freeze the top fan in place. Don’t chip at it. Set the thermostat to emergency heat, let the day and the defrost work, and call us if the fan still won’t turn.
Go by the furnace, not the house. Its age is on the rating plate or coded in the serial number, and most propane furnaces last fifteen to twenty years. A tune-up shows how this one is doing, and a repair gets a written price first. Weighing a new one? The HVAC estimator shows an installed range before anyone comes out.
$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 Delaplane 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.