Close to six Stafford owners in ten heat with electricity, and in Aquia Harbour the Census finds about 97 in 100. That almost always means a heat pump, which moves air differently from a furnace: cooler supply air, longer cycles, the blower turning for hours on a winter evening. More hours of air through the same ducts carries more of the house’s dust past the filter and onto the duct walls.
Stafford sits between two weather stations that disagree about winter. The Marine Corps air station at Quantico, 8 miles northeast of the courthouse, averages about 4,000 heating degree days a year; the Fredericksburg station, 10 miles south-southwest, about 4,300, with 101 freezing nights to Quantico’s 76. Both log 88 degree July afternoons, so a Stafford air handler gets few weeks off.
Four in ten Stafford homes went up in the 1980s and 1990s, and Aquia Harbour’s typical owner house dates from 1984. A heat pump house that age has likely had its air handler replaced at least once, while the trunk lines and the branch runs to each room are still the builder’s. Every swap opens the duct connections at the cabinet, and the photos show whether they were sealed back up or left gapped.
Another four in ten went up after 2000. Embrey Mill, east of Mine Road, mixes townhouses with single-family houses, and around the courthouse the typical owner home is from 2005, with more homes rented than owned. A newer two-story house usually runs flexible duct across the attic to the bedrooms. In a rental the owner decides, and an empty house between leases is the easy time.