Unlike conventional systems that heat or cool by forcing air through large, bulky ducting, Hydro-Air systems deliver total comfort without any ducting whatsoever. Hydro-Air utilizes small, efficient hydronic fan coil wall units in each room that distribute either heating energy from your central water heater or boiler or cooling energy from a standard outdoor air conditioning unit.

The ability to heat or cool only the areas you need (zoned temperature control) results in lower operating cost. Customized controls provide flexibility in zoned space heating and cooling — you choose the rooms you want to heat or cool without wasting energy on unoccupied areas. Hydro-Air heating, cooling, and domestic hot water systems can be combined with popular hydronic radiant floor heating systems for superior comfort that is unsurpassed by any conventional heating equipment.

Winter Heating In a typical application, your home's water heater or boiler is all you need to supply the energy for both heating and domestic hot water use. Durable, flexible piping installed in floors, walls, and ceilings distributes warm water to hydronic fan coil units located in individual rooms throughout the home. A standard wall thermostat activates the fan, which heats the room as air is drawn across the hot water coils. The water is then returned to the water heater or boiler to be re-heated and re-circulated in a continuous cycle.

Summer Cooling For summer cooling, a standard outdoor air-conditioning unit is used to chill water that is circulated through the same piping system to the individual fan coil units. When the thermostat activates the fan, the room is cooled as air is drawn across cooled coils. The water is then returned to the "chiller" system, where it is re-cooled and re-circulated in the cooling cycle. Zone thermostats cycle wall-mounted fan units to maintain the cooling set point in individual areas. When in cooling mode, the water heater or boiler is still available to provide hot water for domestic use.