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Ductless mini splits in Philomont: $7,000 to $10,000 installed for one room, in houses where the ductwork stops short of an addition.
Price range
$7,000-$10,000
8yrs @ 7.99%
$99/mo
15yrs @ 9.99%
$75/mo
Monthly figures on the starting price, the whole price financed, on approved credit. The lender sets the final terms. How financing works
Get your price in writing
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One of our HVAC technicians with a new Trane outdoor unit he just installed.
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
Installed, from the price book our HVAC price estimator runs on. A zone is one room with its own indoor head, and you get the price in writing before you decide.
Ductless mini split, one zone, installed
$7,000 to $10,000
or $117/mo at 0% APR for 60 months
Ductless mini split, two zones, installed
$11,000 to $15,000
or $183/mo at 0% APR for 60 months
Ductless mini split, three zones, installed
$12,500 to $18,000
or $208/mo at 0% APR for 60 months
Ductless mini split, four zones, installed
$16,000 to $21,000
or $267/mo at 0% APR for 60 months
Ductless mini split, five zones, installed
$19,000 to $25,000
or $317/mo at 0% APR for 60 months
Ductless mini split, six zones, installed
$23,000 to $30,000
or $383/mo at 0% APR for 60 months
Monthly figures: 60mo @ 0% APR on each starting price, the whole price financed, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms. How financing works
Where you land in a range is mostly the distance from the outdoor unit to the room, the kind of head and the room left in the electrical panel.
The second zone costs the most because it often needs a bigger outdoor unit. Our mini split cost guide explains.
What’s different in Philomont
About 85 percent of homes in ZIP 20132, the Purcellville-area ZIP that Philomont’s Census figures come from, are detached houses, and detached houses grow. A sunroom, a finished basement, a room over the garage: the original ductwork was drawn for the house as built, and an addition sits at the far end of it or off it entirely. One head on the wall, tied to an outdoor unit, lets that room run on its own settings. One room, one zone, $7,000 to $10,000 installed.
Age matters as much as additions. About 13 percent of homes in the ZIP area went up before 1960, and about 24 percent before 1980. A house from those decades may have ducts squeezed in long after it was built, or a house without any. Ductless avoids opening plaster and framing, since only a small line set crosses the wall. Two rooms are $11,000 to $15,000, three $12,500 to $18,000 and four $16,000 to $21,000, priced from the same book as the HVAC estimator.
Winter is where a mini split gets judged, since its outdoor half spends the cold months working in the open air. The Purcellville station averages a January low of 24.5F, counts 114.7 days a year with lows at or below 32F, and Philomont reached -2F on January 23, 2025. In a propane house, a head can carry the mild weather in a room. In an electric house, it can be the heat for an addition.
Plan the outdoor unit before the indoor head, since the line set between them crosses the wall. A unit on a pad with clearance for air and snow does better than one wedged against a wall. Western Loudoun took 30 to 36 inches in the January 2016 blizzard, and a mounting height above the drifts is worth the extra bracket.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Philomont’s own ZIP, 20131, is post office boxes only, so the Census Bureau maps no area for it. These are ZIP 20132 as a whole, the Purcellville ZIP area Philomont sits in, the Town of Purcellville included.
When it’s the right call
In a Philomont house with an addition, the added room is the one at the end of a long duct or off the system altogether. It stays warm in July and cool in January while the rest of the house is comfortable, and a head of its own is the fix.
The bonus room, the sunroom, the bedroom over the garage. We check for a closed damper or a crushed duct first; sometimes that’s all it is.
An addition, a finished attic, a garage turned into a room. Stretching the ducts into it usually starves the rooms already on them.
Choosing who installs it
Questions worth asking anybody who quotes you, us included.
January lows here average 24.5F, and Philomont dropped to -2F on January 23, 2025. Ask the installer for the unit’s rated low temperature for heating, and what backup heat the room has on the coldest nights.
If the room’s trouble is a closed damper or a crushed duct, a mini split is an expensive fix for a cheap problem. Ask what they checked first.
Ask whether it covers the line set run, the new circuit and putting the walls back, or only the equipment.
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.
Swiftpro did an excellent job installing a minisplit unit for us in our sunroom. They were super professional.
Where we work
Next door to Philomont: Middleburg, Round Hill, Bluemont, Purcellville and Hamilton.
The system we put in first
Built to take a beating. Put in by our crew.
Heat lamps, snow and rain on one outdoor unit: that’s Trane’s own film. We’re a Trane Comfort Specialist, on Trane’s own dealer locator, and when you pick a Trane, our crew puts it in.
Films: Trane’s own.
Questions
Count rooms: each room that gets its own indoor head is a zone. One zone is $7,000 to $10,000 installed, two $11,000 to $15,000, three $12,500 to $18,000, four $16,000 to $21,000. The HVAC price estimator narrows the range to your house, and the written price arrives before you commit.
That is a common case. A duct does not need extending, only a small line set through the wall to an outdoor unit, and the rest of the house keeps its system as it is. Where you want the indoor head and the outdoor unit decides the price within the range.
Installed, one zone is $7,000 to $10,000, two zones $11,000 to $15,000 and three zones $12,500 to $18,000, up to $23,000 to $30,000 for six. The HVAC price estimator gives your number.
Both. A ductless system is a heat pump, and cold-climate models keep heating well below freezing, which covers a Northern Virginia winter.
Ready when you are
Call, or send the form at the top. You get the installed price in writing before anything goes on the wall.
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 Philomont 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.