HVAC is a bigger share of our work in Reston than in any other town where we work regularly, and what sits out back depends on the ZIP. In 20191, around Hunters Woods and South Lakes, about six in ten owners heat with electricity, so the unit beside a cluster townhouse is a heat pump more often than not, its coil working since the first cold night of fall. Nearly half of 20191’s homes went up in the 1970s, so that heat pump is a long way from the house’s first.
Reston Association’s cluster guideline generally puts outdoor units against the house wall, and RA’s Design Review Board can ask for a fence or plantings to hide one, as long as the screen leaves room to service it. A few summers later the shrubs are touching the fins. Cleaning the coil means reaching every side and the service panel, so cut back what’s grown in and unlatch the screen’s gate before the tech arrives.
North Point and the rest of 20194 went up fast, more than eight in ten homes in the 1980s and 90s, and about two thirds of the owners there heat with gas. That makes the usual pairing a plain air conditioner in the yard and its indoor coil sitting on top of the furnace, both moving air with the furnace’s blower. Most of the builder’s outdoor units are long gone, but plenty of the replacements went in before 2010, and the label on the side says whether yours runs on R-22. That refrigerant hasn’t been made since 2020, so know what you have before a leak starts.
In 20190, from Lake Anne to Reston Town Center and the Wiehle station, about four in ten homes are in buildings of fifty units or more. There the cooling is often a compact air handler or heat pump behind a closet door, and any outdoor half sits on the roof or a shared pad. Ask management how the tech gets to both; a roof hatch usually needs a key.