Choosing a heating system for a home is usually a process of
balancing cost, comfort, and convenience. As an hvac contractor
in Pennsylvania, I've seen a recent trend toward a
unique type of hot water heating system called hydro-air. Hydro-air
systems transfer heat from water to air, but they use a fan-coil heat
exchanger instead of the familiar fin-tube or cast-iron baseboards.
The warmed air is then distributed through traditional ductwork.
Hydro-air technology has been used for years in commercial and
industrial applications with either hot water or steam as the heat
source. Its popularity in the residential market is rising because it
NOVEMBER JLC 1997
The air handler in the