Guilford poses an HVAC problem most towns do not: a lot of its housing was built long before ductwork existed, and running conventional forced air through a 200-year-old post-and-beam house is often impossible without wrecking it. That is why ductless mini-splits and high-velocity small-duct systems come up so often around the Green and the historic district.
Out in North Guilford and Nut Plains the constraint flips — larger properties, longer driveways, and frequently propane or oil rather than natural gas, since the gas main does not reach everywhere. Fuel type shapes which equipment actually makes sense.
Covering Guilford from the historic Green out to Sachem's Head, Leete's Island, and Mulberry Point on the shoreline, plus the larger inland properties in Nut Plains and North Guilford where propane and oil are common and natural gas often is not available.
Guilford Green, Sachem's Head, Leete's Island, Mulberry Point, Nut Plains, North Guilford