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Example of a hydro air system installed by Boucher Energy. From left to right: Hot water boiler, air handler/duct system & stainless steel water heater (air handler & water heater powered by boiler).
Why Hydro Air?

Hydro air heating systems are becoming increasingly popular in the New England area. The concept of hydro air is not new, and has existed for most of this century. Boucher Energy Systems has been designing hydro air systems for over 13 years. The growth of the hydro air industry can be directly related to two building traits that have been taking place over the last 15 years: 1) the advent of larger multi-story and multi-winged homes; and 2) the growing need for air conditioning - due to longer and hotter summers and increased solar gain on modern homes from large windows and skylights.

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.

In 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.

Hydro air systems are also more comfortable and generally less dry than conventional hot air systems due to a lower temperature rise through the unit. 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. An example would be radiant heat for the first floor living spaces and hydro air for the bedrooms.

Although not as comfortable as a radiant floor or hot water baseboard system, a hydro air system allows for greatly increased comfort over hot air 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.

What if I want a hydro air system?

Give us a call at (508) 473-6648, email us, or click here to make an appointment. We will arrange for someone to come to your home and discuss different hydro air system options for your particular needs.
 

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