The boiler quit on a below-zero morning
A boiler that limped along in November tends to give up on the coldest day. Lovettsville has seen 5 below in January more than once lately, so the weak part is worth finding before then.
Propane runs most Lovettsville boilers; budget $99 for the yearly tune-up and $9,900 to $16,500 if one needs replacing.
Price range
$9,900-$16,500
8yrs @ 7.99%
$140/mo
15yrs @ 9.99%
$106/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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5.0 stars across 1,132 reviews
Two of our heating technicians in a Northern Virginia basement. The same team tunes up, repairs and replaces boilers.
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
A new boiler runs $9,900 to $16,500 installed, the range of our own boiler replacements; a condensing or combi boiler lands at $12,782 to $16,500. A tune-up is $99 a system.
High-efficiency condensing boiler or combi boiler, installed
$12,782 to $16,500
or $213/mo at 0% APR for 60 months
Cast iron boiler on the chimney, replaced like for like, installed
$9,900 to $13,690
or $165/mo at 0% APR for 60 months
Boiler tune-up, one system
$99
Boiler repair diagnostic visit
$99
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
A repair starts with the $99 diagnostic. If the fix is a circulator pump, a valve or an expansion tank, you get that price in writing before we start, and you decide.
Want a closer number before anyone comes out? The boiler estimator asks a few questions about yours and shows the range for that job.
What’s different in Lovettsville
Propane heats more than four in ten of Lovettsville’s 648 owner homes and electricity about as many, with utility gas at about one in twelve. A hot water boiler in the Town is uncommon, and the ones we’d meet usually burn propane from a tank on the lot. Detached houses make up about eight in ten owner homes, and about one in seven homes is rented.
About six in ten owner homes went up since 2000, the typical one in 2007, but about one in five predates 1960, and that older core is where radiators and baseboard are. A cast iron boiler there usually vents up a chimney in metal pipe; a condensing boiler or Navien combi, at $12,782 to $16,500 installed, takes the vent out through a wall instead.
Loudoun County issues the building permit for a boiler swap in Lovettsville, while the Town handles zoning. The Town also runs its own water from four wells, and its rules put the pressure regulator on the customer, so the house’s own regulator is part of what keeps the boiler’s fill valve and relief valve behaving. That regulator sits where the Town’s line enters the house, so it’s a quick check on the same visit.
The Purcellville station averages a January low of 24.5 degrees, and a local station read 5 below zero on January 27, 2026. When the heat quits in that cold the house cools fast, which is the argument for having the expansion tank, the relief valve and the circulator looked at in October. A frozen condensate line can also stop a condensing boiler in that cold, and clearing it is a small job.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
What it’s telling you
A boiler that limped along in November tends to give up on the coldest day. Lovettsville has seen 5 below in January more than once lately, so the weak part is worth finding before then.
A new Weil-McLain gas boiler installed by SwiftPro in a Northern Virginia basement, with copper near-boiler piping and a bank of Taco zone valves feeding the heating loops.
Safety and paperwork
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.
In its fall clock-change reminder, Loudoun County’s fire and rescue system tells residents to check their carbon monoxide alarms, and recommends one outside each sleeping area and on each level of the home, tested monthly. Source.
Loudoun County Fire and Rescue says to have heating equipment and chimneys cleaned and inspected every year by a qualified professional, and to keep anything that can burn at least three feet from all heating equipment. Source.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who works on it
Questions to ask anybody who quotes you, us included.
Lovettsville’s water comes from the Town’s own wells, and the pressure regulator is the homeowner’s. Ask whether the tech will check it along with the boiler’s fill valve.
A hot water boiler is half heating system (the burner, gas valve, flue and controls) and half plumbing (the water loop, circulator pumps, expansion tank, relief valve and zone valves). We hold a Virginia Class A license and run separate heating and plumbing teams, so each half gets a tech who does that trade every day.
A new boiler can stay on the chimney or vent out the wall in plastic pipe. A good quote says which, and whether the chimney needs a liner, because that’s where two quotes for the same boiler usually split.
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.
…did a great job recommending a new system for a Condo that did not previously have one at all (Old Boiler System). The installation went great.
Where we work
Next door to Lovettsville: Waterford, Paeonian Springs, Hamilton, Purcellville and Leesburg.
Questions
Fairly. With propane and electricity heating most homes, a boiler is one house in many, but it gets the same $99 tune-up and the same repair price in writing after the $99 diagnostic.
Where ducts for cooling already exist, a heat pump on them can be priced beside a new boiler; where they don’t, the heat pump route is ductless mini splits, and a new boiler is often the simpler job.
No. We work on hot water boilers, the kind that heat radiators or baseboard, on natural gas or propane. If yours is steam or burns oil, we’ll tell you on the phone, and a switch to a heat pump or a gas or propane boiler is ours to price.
Ready when you are
Call any time: we run 24/7 emergency service. Or send the form at the top. A tune-up is $99, a repair starts with the $99 diagnostic, and a new boiler gets a written price before any work.
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 Lovettsville 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.