Furnace and AC replacement in Catharpin.
Furnace and AC replacement in Catharpin runs $8,898 to $23,000 installed, in a ZIP where the median owner home dates to 1986.
- Your price range up front
- Sized to the house, not the old label
- Dedicated HVAC team
Get your new system priced
Catharpin houses span four building eras, so the pair rarely ages together.
Sort the ZIP’s owner homes by finish date. About one in five date from before 1960, a bit over one in five from 1960 up to 1980, another one in five from 1980 through 1999, and a bit under four in ten from 2000 on. A house from the first two groups has been through at least one replacement. In the last group, the first furnace and condenser are the ones now getting old.
Electric heat covers nearly half the owner homes here, so for many Catharpin houses a pair really means a heat pump system, installed at $8,499 to $21,650. In a propane house, the heat pump can take the air conditioner’s spot while the furnace stays as the backup for the coldest nights. The same quote can price both routes, so you can compare them.
Catharpin has seen weather that tests an outdoor unit. Hail up to ping pong ball size fell near Catharpin in August 2011, and numerous large trees came down near Catharpin and Sudley Springs in June 2020. A detached house gives you a choice of where the new condenser stands. A spot clear of overhanging limbs beats the old pad if the old pad sits under one.
Dulles logs 4604 heating degree days a year against 1233 cooling ones, close to four to one. The furnace is the half that works hardest here, and sizing it matters most. A house with a finished basement or an addition since 1986 is not the house the old equipment was sized for, which is why the tech measures rather than reading the old label.
What a new furnace and AC costs in Catharpin.
$8,898 to $23,000 installed for a furnace and air conditioner replaced together, 2 to 5 ton, from the same price book as our estimator. Where you land depends on the size of the house, the efficiency you pick, and what the ductwork and venting need.
- Furnace and AC together, installed$8,898 to $23,000
- Furnace alone, keeping your AC$4,285 to $14,040
- Heat pump system instead$8,499 to $21,650
The HVAC replacement estimator gives your house its own number. Then we measure, and the price is in writing before anything is ordered.
Two years of labor come with every install. Monthly plans are on our financing page.
When replacing both makes sense in Catharpin.
A furnace that runs constantly and still trails the thermostat
At 4604 heating degree days a year, an undersized or tired furnace runs near nonstop in a Catharpin January, and leaky ducts leave rooms cold regardless. A bigger furnace doesn’t fix cold rooms on its own. The diagnostic visit, $99, finds out which problem you actually have.
The outdoor unit runs on R-22
The label on its side names the refrigerant. R-22 hasn’t been made or imported in the US since 2020, so a leak gets expensive. Replace it on your schedule, not in July.
A big repair on an old system
A compressor or heat exchanger on a system past 15 years deserves a replacement price beside it, and you’ll get both numbers.
Who signs off on a new system in Catharpin.
Prince William County
Prince William County lists any work that alters a home’s heating and air conditioning as permit work, but swapping an electric furnace, heat pump or air conditioning condensing unit for the same type of unit in the same spot is an ordinary repair that needs no permit. Source.
Prince William County requires a permit to replace a gas or propane furnace or a gas appliance such as a water heater, even like for like. Replacing an electric water heater with one the same size in the same spot needs no permit. Source.
How to pick who replaces your furnace and AC in Catharpin.
Ask every company that quotes the job, us included.
Did they measure the house, or just match the old equipment’s size?
Ask for a written load calculation, not a match to the label. Houses here have grown since they were built, and the median build year is 1986. When a house has two systems, ask for each on its own line, so you can replace the tired one now and schedule the other.
Do they size it to the house, or copy the old label?
The old size is a guess somebody made years ago. Ask whether they measure the house and check the ductwork first. Too big short cycles; too small runs all afternoon in August.
Is the whole job in the written price?
Furnace, outdoor unit, matching coil, refrigerant lines, thermostat, permit and hauling the old one away. If it isn’t on the paper, ask.
Already holding another company’s quote?
Our free second opinion looks at the system you were quoted on and tells you what it actually needs, with our price if you want it.
What our customers say.
Ndung and Oscar were great. Everything went smoothly, and after the install they made sure to show me everything I needed to know about the new unit.
5.0 stars across 884 Google reviews. Read them on our reviews page.
Furnace and AC replacement questions from Catharpin.
Does a heat pump replace both the furnace and the AC?
It can, if you want one outdoor unit and one system doing both jobs. The Census counts heat pumps as electric heat, and about 46% of owner homes in 20143 heat with electricity. Our heating page lays out the options, and the estimator quiz prices the one that fits your house.
Is replacing both at once better than the furnace alone?
Installed, a furnace by itself is $4,285 to $14,040, and putting an air conditioner beside it brings the total to $8,898 to $23,000. The extra buys the outdoor unit and coil, the half that heat, hail and age wear on. If the condenser is sound and dates from the 2010s or later, price it both ways before deciding. If the two share a build year, the pair makes sense.
How much does a new furnace and AC cost in Catharpin?
$8,898 to $23,000 installed for the pair, by size and efficiency. A furnace alone, keeping your AC, is $4,285 to $14,040. The HVAC replacement estimator gives your house its own number.
Do I have to replace both at the same time?
No. If the AC is young and only the furnace failed, replace the furnace. If they’re the same age, do both: a new outdoor unit needs a matched coil, and one built for the old refrigerant isn’t rated for the new one.
Furnace and AC replacement in the towns next door.
- Furnace and AC replacement in Gainesville
- Furnace and AC replacement in Haymarket
- Furnace and AC replacement in Centreville
- Furnace and AC replacement in Chantilly
- Furnace and AC replacement in Bristow
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Start with your number, then a written quote.
Call, book online, or take the HVAC replacement estimator first. We measure before we quote, and if a repair makes more sense than a new system, you’ll hear that first.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Catharpin 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.
SwiftPro Heating, Cooling & Plumbing, 4230 Lafayette Center Dr, Suite N, Chantilly, VA 20151, (703) 997-9757. Book online, read our reviews, or see every town we serve.