Furnace and AC replacement in Waterford.
Replacing a Waterford furnace and AC together runs $8,898 to $23,000 installed. In ZIP 20197, propane heats more than half the owner homes.
- Your price range up front
- Sized to the house, not the old label
- Dedicated HVAC team
Get your new system priced
Waterford has nearly five times the heating degree days of cooling ones.
With a median build year of 1996 for owner homes in ZIP 20197, the furnace and air conditioner that came with a typical house are about thirty years old and have worked as a pair since the day they went in. The two share a blower and a duct system, so when both are tired, replacing them together is one install in place of two, with the ducts looked over once.
The Purcellville station logs 4,942 heating degree days in a normal year against 1,049.6 cooling degree days, nearly five times as many on the heating side. That tilts the choice. The furnace half does most of the work in Waterford, so the heating side deserves the most attention when you compare quotes. In a house with an air conditioner past its prime, a heat pump system at $8,499 to $21,650 is the other way to ask the same question.
Propane heats more than half of Waterford’s owner homes, electricity about 23 percent and oil about one in six. Propane is priced like gas, with the furnace set up for the fuel. Some of the electric houses likely run a heat pump already, and for those the matching job is a heat pump system at $8,499 to $21,650 installed. We don’t work on oil burners, but moving an oil house to a propane furnace or a heat pump is ours to price.
The outdoor unit is the half of the pair that stands in the weather. The June 2012 derecho, with winds estimated near 76 mph, snapped many trees along Thicket Court, and July 2025 gusts blew trees down in Waterford, so a pad under a big limb is worth a second look. In the central village, Loudoun’s Waterford Historic District has its review committee approve most exterior changes, and a condenser in a new spot is one.
Waterford houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Waterford
ZIP 20197 as a whole: every Waterford address, the village included. The Census place for the village alone has too few homes for steady figures.
- Median home built1996 Census
- Built before 1980about 3 in 10 Census
- Built since 2000about 3 in 10 Census
- Most homes aresingle-family houses, nearly all Census
- Heated withelectricity, about 2 in 10 Census
- Rentedabout 1 in 10 Census
- A few homes still burn heating oil. We don’t work on oil burners, but a switch to a heat pump or a gas or propane furnace is ours to price.
What a new furnace and AC costs in Waterford.
$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 Waterford.
Two repair bills in a year on a thirty-year-old pair
When both halves are failing, the diagnostic at $99 tells you which is which. If a furnace and AC from a 1996 house both need parts, put the two repair prices beside the replacement range before you pay for either. The estimator quiz gives your own house its number.
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 Waterford.
Loudoun County
Loudoun County requires a permit to swap a gas water heater or furnace. Since October 2025, a replacement that keeps the same BTUs in the same spot needs no plans. Source.
How to pick who replaces your furnace and AC in Waterford.
Ask every company that quotes the job, us included.
Did they ask what fuel heats the house before pricing the pair?
Propane, electric and oil houses need three different answers in Waterford: a propane furnace with a new AC, a heat pump system, or a move off oil that we price but don’t burn. A quote that doesn’t ask has guessed. Ask to see the furnace alone, $4,285 to $14,040, beside the pair.
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.
Hard working crew that removed old system and installed new system in a professional manner.
5.0 stars across 884 Google reviews. Read them on our reviews page.
Furnace and AC replacement questions from Waterford.
My AC is newer than my furnace. Should I replace both?
Probably not yet. Replacing only the furnace and keeping your AC is $4,285 to $14,040 installed. Replacing both makes sense when the two are the same age and both need parts. Check the label on each, and weigh the pair against the single furnace before you decide.
Does Loudoun want a permit to swap the furnace?
Yes. Loudoun County requires a permit to swap a gas furnace, and since October 2025 a swap at the same BTUs in the same spot needs no plans. A bigger furnace or a new location means plans. Ask your installer which one yours is before the old furnace comes out, not after.
How much does a new furnace and AC cost in Waterford?
$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 Paeonian Springs
- Furnace and AC replacement in Lovettsville
- Furnace and AC replacement in Hamilton
- Furnace and AC replacement in Leesburg
- Furnace and AC replacement in Purcellville
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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 Waterford 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.