Waterfront houses, rebuilds and long duct runs
Many homes in the area are mid-century single-story houses, and a good number have been expanded or rebuilt larger over time. Bigger houses usually mean more than one air handler and longer runs through attic space, with more joints where leaks and dust can appear.
Homes close to the water also face wind-driven rain during storm season, which can wet attic insulation and flexible duct if a roof edge or soffit lets water in. Outdoor cooking, patio doors left open and boat work add grease film and fine grit to the air that circulates indoors. We look hard at the return side, because that is where most dirt enters.
