Boiler repair and replacement in Round Hill.

ZIP 20141 holds 2,362 owner homes. Electricity heats a little over half and propane about four in ten, while utility gas reaches only 46 of them, so a boiler in Round Hill burns propane from a tank on the lot. Most of the housing is young: half the owner homes date from 2004 or later, built around forced air. Propane, at about four in ten owner homes, is the town’s second fuel after electricity.

That leaves the boilers in the older houses, about one in seven built before 1980, many on bigger lots outside the town. Out there the boiler is likely cast iron on a chimney, and the swap is either another one in its place or a wall-hung condensing boiler, $12,782 to $16,500 installed, with a plastic vent.

Inside the Town limits, the Town issues the zoning permit first, and only after that does Loudoun County issue the building permit. On the county side it’s the County alone. Either way a propane boiler replacement is permit work, so the sequence belongs in the plan before the old boiler comes out.

Round Hill households mostly own and occupy detached houses, so the repair-or-replace decision sits with the homeowner. October is the month to have the circulator, the relief valve and the system pressure looked at, before the cold makes them urgent. Watch the propane gauge as well, since a tank run low in January can look exactly like a boiler that quit.