I have a forced hot air system. I am going to put a water to air heat exchanger in the plenum over the furnace to serve my Solo Innova 50. The plenum already has an air conditioning coil in it. If the current furnace fan doesn't produce enough cfms, when set on high speed, to blow sufficient air through both the a/c coil and the w/a hx, I may have to put in a separate air handler for the w/a hx.
The existing furnace and new air handler will both feed into the same extended plenum in the attic, that now only the existing furnace's plenum is connected to. I think I would need to put in some kind of automated, motorized damper in both the existing furnace's plenum and the new air handler's plenum, so only one plenum is open at a time. My question is, are there motorized dampers of a size and design that would fit into a plenum. The ones I looked at online to cover my boiler room's outside air intake were fairly expensive even for covering a small 14" x 14" opening, much less the size of a plenum. Maybe there is a simpler kind of one flap damper that might do the job. I don't know what might work or may be available.
An alternate solution to the problem I've considered, might be to put a fan in the existing plenum to provide supplemental cfm's to the furnaces current fan. Then I wouldn't have to buy an additional air handler. Has anyone ever tried to do that, or know of a fan that might fit into a plenum and provide supplemental cfm's. I am leary of trying to change out and upsize the current fan and fan motor in my Lennox Pulse gas furnace. I couldn't find one in the Graingers catalog that would fit into the limited space anyway. Any suggestions would be appreciated on either idea. Thanks.
Mike
The existing furnace and new air handler will both feed into the same extended plenum in the attic, that now only the existing furnace's plenum is connected to. I think I would need to put in some kind of automated, motorized damper in both the existing furnace's plenum and the new air handler's plenum, so only one plenum is open at a time. My question is, are there motorized dampers of a size and design that would fit into a plenum. The ones I looked at online to cover my boiler room's outside air intake were fairly expensive even for covering a small 14" x 14" opening, much less the size of a plenum. Maybe there is a simpler kind of one flap damper that might do the job. I don't know what might work or may be available.
An alternate solution to the problem I've considered, might be to put a fan in the existing plenum to provide supplemental cfm's to the furnaces current fan. Then I wouldn't have to buy an additional air handler. Has anyone ever tried to do that, or know of a fan that might fit into a plenum and provide supplemental cfm's. I am leary of trying to change out and upsize the current fan and fan motor in my Lennox Pulse gas furnace. I couldn't find one in the Graingers catalog that would fit into the limited space anyway. Any suggestions would be appreciated on either idea. Thanks.
Mike