Open 24/7 for emergencies
A one-zone ductless mini split in Delaplane runs $7,000 to $10,000 installed, for a railroad-era house, a farm tenant house or a room the ducts missed.
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
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
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 Delaplane
Delaplane began as Piedmont Station, a stop on the Manassas Gap Railroad from 1852, and took its present name in 1874. The National Register survey of the Crooked Run Valley dates the village’s brick and frame houses from about 1852 into the early 1900s, built for stoves and fireplaces, and one of its old commercial buildings is a home now. Ducts in houses like that mean opening walls nobody wants opened. A head on an outside wall in each room that counts, with the lines run down the outside, leaves the plaster alone.
Out in the valley the survey describes farm dwellings of local fieldstone, and tenant houses from the late 1800s to the mid 1900s scattered across the big farms. A tenant house is often a few small rooms with no ductwork at all, and two or three heads on one outdoor unit can heat and cool the whole place: two zones run $11,000 to $15,000, three run $12,500 to $18,000. Through stone, every line needs a cored hole and a tight seal, so agree on where each one goes before the drill comes out.
Most of 20144 is newer than either: about half its homes date from the 1980s and 1990s and a quarter from 2000 on, nearly all detached, with ducts to every original room. There a mini split is for space finished later, like a walkout basement turned into a family room or a porch closed in. On the horse and cattle farms the survey describes, a barn office or tack room is the same job: one head, one outdoor unit, no ducts.
Mind the snow when placing the outdoor unit. The Plains 2 NNE, the closest snowfall station, averages about 20 inches a winter, 8 of them in January, and the 2016 blizzard left an estimated 24 to 36 inches on northern Fauquier. A wall bracket or a tall stand keeps the unit above a drift, and it belongs out from under the roof edge, where sliding snow and ice land.
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 the right call
About one Delaplane owner home in twenty heats mainly with wood or another fuel the Census groups with it, and a stove warms its own room far better than the bedrooms at the far end. A head or two at the cold end evens out the winter and cools the house in summer.
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.
Paperwork, locally
Fauquier County counts swapping an electric appliance for a similar one in the same spot as an ordinary repair that needs no permit. Moving an appliance to a new spot takes one. Source.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who installs it
Questions worth asking anybody who quotes you, us included.
Every head makes water when it cools, and it drains down the outside wall with the lines or to a small pump where gravity won’t do it. Ask where each drain ends, so it isn’t dripping by the door or freezing across a walk in January.
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.
We had a mini split ac/heat unit installed. They were here when they said they would be, were very professional, and did a very nice job.
Where we work
Next door to Delaplane: Rectortown, Upperville, Marshall, The Plains and Orlean.
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
A cold-climate model sized for the room will. Thick stone holds cold as stubbornly as it holds heat, so a room left unheated takes a while to come up; a head that runs steadily does better than one switched on only when someone walks in. Size it for January nights here, which average about 25 at Warrenton 3 SE.
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 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.