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A furnace tune-up in Manassas is $99 a system. Natural gas or propane, in a Sudley closet or a Loch Lomond basement.
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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 Manassas
Inside the City of Manassas, gas and electricity split the owner homes almost evenly, so a City furnace tune-up starts with a question: is there a furnace? About half the City’s owners heat with electricity instead, usually a heat pump backed by electric coils in the air handler, and no burner anywhere. That heat pump is tuned up for $99 like any furnace, with the defrost, the backup coils and the airflow checked in place of a flame.
Loch Lomond is the oldest gas pocket around Manassas: three in four owners burn gas, and the median house dates from 1968. Many still send the furnace’s exhaust up the original masonry chimney, often beside the water heater’s. There the safeties that matter most are the pressure switch that proves the exhaust fan is pulling and the rollout switches by the burners, which trip when flame curls out because the exhaust has nowhere to go.
Sudley, in 20109, is close to half townhouses, median 1977, and six in ten owners burn gas. The furnace often sits in a closet or a small utility room with the AC coil stacked on top, pulling air back through a grille in the door. A solid door, a filter too dense for the return or a sofa against that grille makes the furnace heat too little air too hard, and temperature rise is the reading that catches it.
Buckhall burns more propane than anywhere else on a Manassas address, about eight owner homes in a hundred. A propane furnace runs its burners at close to three times natural gas pressure, about 10 inches of water column against 3.5, so the tune-up puts a gauge on it and checks it against what the maker calls for on propane. Half of Independent Hill went up since 2000, and plenty of furnaces there are the builder’s, near twenty years old.
Neighborhood by neighborhood
Census figures for the owner-occupied homes in each place, and what that usually means for a tune-up.
| Place | Median home built | Most homes are | Heated with | What the tune-up usually meets |
|---|---|---|---|---|
| City of Manassas | 1985 | single-family houses, about 4 in 10 | electricity, about 5 in 10 | Mostly heat pumps; furnaces are the smaller share. |
| Buckhall | 1995 | single-family houses, about 8 in 10 | electricity, about 5 in 10 | A mix of heat pumps and gas furnaces. |
| Sudley | 1977 | townhouses, about 4 in 10 | gas, about 6 in 10 | Townhouse furnaces in closets and attics. |
| Independent Hill | 2000 | single-family houses, nearly all | gas, about 6 in 10 | The builder’s gas furnaces, many close to 20 years old. |
| Bull Run | 1995 | condo and apartment buildings, about 5 in 10 | gas, about 7 in 10 | Condo buildings: compact gas furnaces in closets. |
| Yorkshire | 1984 | single-family houses, about 4 in 10 | gas, about 5 in 10 | 1980s and 90s houses, most on their second gas furnace. |
| Loch Lomond | 1968 | single-family houses, nearly all | gas, about 7 in 10 | Gas furnaces in older houses, often on a chimney shared with the water heater. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
The whole City sits in ZIP 20110. It runs its own water, sewer and electric service.
Sudley and Bull Run in 20109, Yorkshire and most of Buckhall in 20111, Independent Hill in 20112, plus the county edges of 20110.
When it’s worth doing
On a closet furnace that’s often the high limit at work: too little air crossing the heat exchanger, so it overheats and the burners cut out to protect it. Change the filter and clear the return grille first. If it keeps happening, the tune-up’s temperature rise reading shows why.
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
Prince William County Fire and Rescue says to have a qualified technician inspect the heating system and chimneys every year, to make sure nothing blocks the fumes from venting out of the house. Source.
Prince William County Fire and Rescue lists furnaces and water heaters among the household sources of carbon monoxide, and says to put a CO alarm outside each sleeping area and on every level of the home and to test it monthly. 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.
Most furnaces leave the factory set for natural gas, and burning propane takes a conversion kit: new orifices and a change at the gas valve, usually noted on a tag inside the cabinet. Ask the tech to confirm yours has one and tell you the pressure they read.
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.
Excellent service and attention to detail. James was super thorough and explained everything to me. I highly recommend them for any plumbing needs
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 Manassas: Bristow, Nokesville, Clifton, Centreville and Catharpin.
Questions
Look at the indoor unit. A gas furnace has a gas pipe with a shutoff valve running in and a vent running out, metal toward a chimney or two white plastic pipes through a wall. A heat pump’s air handler has wiring, two copper lines and a drain. No gas pipe means a heat pump, and the tune-up is $99 either way.
Yes. Manassas Park is its own city inside 20111, where seven in ten owners heat with gas. Same visit, $99 a furnace.
$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 Manassas 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.