Ductless mini splits in Herndon.
Ductless mini splits in Herndon run $7,000 to $10,000 installed for one zone and $11,000 to $15,000 for two, for the rooms your ductwork never served well.
- Published price ranges
- Heats and cools, room by room
- Dedicated HVAC team
Get your mini split priced
Herndon rooms past the reach of the ducts, and who has a say on the outdoor unit.
Plenty of Herndon houses have more house than they started with. About 4 in 10 owner homes inside the town predate 1980, and three in four in Franklin Farm went up between 1980 and 1999; many have since had basements finished, garages closed in or rooms built on. The system was sized for the original floor plan, and a duct pushed out to the new room borrows air from every room ahead of it. Giving that room its own head and outdoor unit leaves the main system’s balance untouched.
Inside the Town’s historic district, a new outdoor unit and a line set on the wall change the outside of the house, and most exterior changes there need a Certificate of Appropriateness from the Historic District Review Board before work starts. Applications are usually due about 30 days before the board’s hearing, and additions are among its most common cases. If your house is in the district, ask the Town before you set a date.
About half the homes inside the town are townhouses or condos, and in McNair it’s nearly 9 in 10. In a townhouse the top-floor bedrooms run warmest; in a condo the trouble is often one room at the end of a short duct run. Either way, the association usually decides where the condenser may sit, so get its answer in writing before the quote is final.
Inside the town a mini split is mechanical work on a Town of Herndon permit, and the new circuit that feeds it is electrical work, which the Town permits separately. On the county side it’s Fairfax County, and its rules are below.
Where a mini split usually goes across Herndon.
Census figures for the owner-occupied homes in each place, and the room a ductless head usually ends up in.
| Place | Median home built | Most homes are | Heated with | Where ductless usually fits |
|---|---|---|---|---|
| Franklin Farm | 1985 | single-family houses, about 9 in 10 | electricity, about 5 in 10 | 1980s and 90s houses: the bonus room, the sunroom, the far bedroom. |
| Herndon | 1981 | single-family houses, about 4 in 10 | electricity, about 6 in 10 | 1980s and 90s houses: the bonus room, the sunroom, the far bedroom. |
| Dranesville | 1984 | single-family houses, nearly all | electricity, about 6 in 10 | 1980s and 90s houses: the bonus room, the sunroom, the far bedroom. |
| McNair | 2003 | condo and apartment buildings, about 6 in 10 | gas, about 7 in 10 | Condo buildings: an outdoor unit needs the association’s yes. |
| Floris | 1990 | single-family houses, about 8 in 10 | gas, about 6 in 10 | 1980s and 90s houses: the bonus room, the sunroom, the far bedroom. |
| Hutchison | 1979 | townhouses, about 5 in 10 | electricity, about 7 in 10 | Townhouses: the top floor, where the HOA allows the outdoor unit. |
| Sully Square | 2015 | condo and apartment buildings, about 6 in 10 | gas, about 6 in 10 | Condo buildings: an outdoor unit needs the association’s yes. |
Herndon houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
The Town of Herndon
Inside the town limits. Floris, Franklin Farm, McNair and Dranesville, on the Fairfax County side, are counted by the Census as places of their own.
- Median home built1981 Census
- Built before 1980about 4 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 4 in 10 Census
- Heated withelectricity, about 6 in 10 Census
- Rentedabout 4 in 10 Census
- In townhouse communities the HOA often has a say in where an outdoor unit can sit.
- Where the heat is already a heat pump, a ductless head is the same kind of equipment, sized for one room.
What a ductless mini split costs in Herndon.
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
- Ductless mini split, two zones, installed$11,000 to $15,000
- Ductless mini split, three zones, installed$12,500 to $18,000
- Ductless mini split, four zones, installed$16,000 to $21,000
- Ductless mini split, five zones, installed$19,000 to $25,000
- Ductless mini split, six zones, installed$23,000 to $30,000
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.
When a ductless mini split makes sense in Herndon.
The basement office is fine in July and cold in January
A 1980s Herndon basement finished years after the house went up often got whatever air the nearest duct could spare. Because a ductless head heats as readily as it cools, that room finally gets a setting of its own in both seasons.
One room is always wrong
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.
New space with no ducts
An addition, a finished attic, a garage turned into a room. Stretching the ducts into it usually starves the rooms already on them.
Who signs off on a mini split in Herndon.
How to pick the best mini split installer in Herndon.
Questions worth asking anybody who quotes you, us included.
Did they ask about the historic district or the HOA first?
In Herndon the outdoor unit is the part that needs someone’s yes: the Town’s review board in the historic district, the association in many townhouse and condo communities. A good installer asks before quoting, not after the head is on the wall.
Did they check the rest of the house first?
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.
Is the whole job in the price?
Ask whether it covers the line set run, the new circuit and putting the walls back, or only the equipment.
What our customers say.
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Ductless mini split questions from Herndon.
How many zones does a Herndon townhouse need?
Count the rooms that never feel right. If it’s only the top-floor bedroom or a finished lower level, one zone at $7,000 to $10,000 covers it; two run $11,000 to $15,000 and three $12,500 to $18,000. Planning a second room later? Say so now: the outdoor unit gets chosen for every head it will ever run.
Do the newer condo buildings in McNair need mini splits?
Less often. Most of McNair went up since 2000 with ducts to every room, so a head there usually answers one room that never keeps up, like a corner room with two outside walls. The association’s rules on the outdoor unit come first, and about three in four McNair homes are rented, so a tenant needs the owner’s yes too.
How much does a ductless mini split cost in Herndon?
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.
Does a mini split heat, or only cool?
Both. A ductless system is a heat pump, and cold-climate models keep heating well below freezing, which covers a Northern Virginia winter.
More from SwiftPro in Herndon.
More from SwiftPro in Herndon
Tell us which room it is.
Call, or book online and pick a window. You get the installed price in writing before anything goes on the wall.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Herndon and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 884 Google reviews. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
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