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high eff. gas furnaces

high eff. gas furnaces

high eff. gas furnaces

(OP)
has anyone heard of or seen a 90% eff. gas packaged heating and cooling unit for residentail or commercial applications

RE: high eff. gas furnaces

Actually these are quite common.  Trane, Carrier, DayNight and several others make residential gas furnaces of 90% efficiency or higher.  Usually they are sealed combustion units and require a condensate drain.  They all come with cooling options but that cycle efficiency is of course, usually stated in EER or SEER.

RE: high eff. gas furnaces

I believe mt31 is talking about a packaged unit, as opposed to a furnace with split system AC.

Split systems are very versitile, and you can easily match a high efficiency AC and furnace.  But in packaged units, I have only seen standard efficiency (80% AFUE) gas heat, even with high SEER (16+) cooling.  Maybe someone can tell us why.

---KenRad

RE: high eff. gas furnaces

(OP)
Yes KENRAD, thats right.  I have dealt with 90% split systems for residential applications.  I have not been able to offer lght commercial pack units with the higher eff. on the heating side of the system.  I can imagine that there are some obstacles to this.  I would like to be able to put high eff. heating in light commercial, this is a high energy consumer and we should address this for conservation  of energy.  I still researching this myself.   thanks

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