Reston is heating-and-cooling country for us: HVAC is a bigger share of our work here than in any other town where we work regularly, and so is duct cleaning. Most of it happens in attached homes. Single-family houses are the minority here, about two in ten homes; townhouses make up about three in ten, and condo and apartment buildings are the biggest single group.
Each of those keeps its system somewhere different, and that decides where the work is. A Reston condo usually has a compact air handler behind a closet door feeding a handful of short runs, and the building’s shared pieces, like a common return or an exhaust shaft, are the condo association’s. A cluster townhouse tucks its air handler into a closet, up in the attic or down in the basement, and leans on one or two oversized returns per floor, which is where dust piles up first. The single-family houses are bigger, and a house with two systems gets two cleanings, one per air handler.
Heating splits nearly down the middle. Gas warms about half of Reston’s owner homes and electricity nearly all the rest, and in Reston’s townhouses and condos electric heat usually means a heat pump. That machine moves air through your ducts twelve months a year, in long, slow cycles, so the ductwork here never gets an off season.
Ages are mixed as well: roughly four of every ten homes predate 1980, a similar share arrived in the 1980s and 1990s, and around two in ten are newer than 2000. The older clusters usually still run their original sheet metal, which has carried more than forty years of air through every renovation and air handler swap since. The newer homes lean on flexible duct, which needs a gentler brush than metal.