The hypothetical scenario involved Dave, a residential air conditioning contractor in northern Kentucky, who ran a service call to a 20-year-old, 2,000-square-foot home. He discovered that a 500-square-foot addition had been completed about five years ago to make room for a new bedroom and family room.
The home's 2.5-ton heat pump system provides the primary heating and cooling; a 60,000-Btu, 80-percent AFUE natural gas furnace is the auxiliary heat source. Sheet metal ductwork runs throughout the original portion of the home; duct board and flex duct were installed in the addition. The ductwork is consistent with that typically found in northern Kentucky. A portion of the original ductwork runs through a crawl space under the house.