Boucher Energy Systems, Inc. has been installing hydro air systems for over 25 years. A hydro air system is a combination of a hot water and a hot air system. A hot water boiler, either oil or gas fired, generates heat. The water is then pumped through small diameter tubing to an air handler unit. This unit contains a hot water coil, an air conditioning coil, and a fan (blower) unit. This unit resembles an air conditioning air handler. As hot water heats up the coils, the blower then passes air over the coils. This air is then distributed throughout the home via a duct system. The same ductwork is also used to distribute cool air if an air conditioning unit is also attached.

This design concept has several advantages over straight hot air heating. The most prominent advantages are: 1) ease of zoning; 2) the proper sizing of zones; 3) increased comfort levels over straight hot air systems; and 4) the ability to easily expand the system and generate heat in other ways that a traditional hot water system cannot.

These expansions could include heating a garage, pool, hot tub, addition, or to generate domestic hot water for showers, laundry, etc.  All the advantages of hydro air would be difficult or impossible with a straight hot air system. Zoning is much easier because a flue pipe or exhaust is not needed for each unit, as with separate furnaces.

Hydro Air SystemIn a hydro air system, no combustion is taking place inside each air handler. Consequently, the air is not as hot or as dry as in a hot air system, and soot and combustion odors are not present inside the unit. This makes hydro air systems, on average, much cleaner and more comfortable than hot air systems. In addition, large sections of floor space are not taken up by ducts that need to be boxed in as they would on a conventional system – in order to reach various wings or stories of the home. Properly designed, the units will cycle on and off less, lowering the temperature swings within a room.

Hydro air is an excellent choice for use in conjunction with other systems. It is a cost effective alternative to a complete hydronic (wet) system with separate air conditioning ducting, thus giving the homeowner great versatility at moderate cost, with the appealing, added ability for central air conditioning.

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