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Posted by Paul on February 17, 2009 at 12:53:56:
Well, I'm a little confused and was wondering if someone could offer me some advice on what sort of setup is reasonable for DHW and the hydronic heating coil used by our air handler. Our house has 3 bathrooms (i.e., 3 showers) and according to the specs for the air handler's hydronic heating coil it requires a water flow rate of between 2-5 gpm (at a water temperature of 160).
I've had a few contractors come by and have received just as many solutions:
(a) 2 Takagi T-K3 (11-199M) water heaterS
(b) a Phoenix water heater (PH199-55) and a sidearm heater (type not specified)
(c) a Phoenix water heater (PH199-55) -- NO sidearm heater
(d) a Munchkin boiler (199M) and a Triangle Tube Smart 30 (30 gallon) sidearm tank
We live in an area that in the winter times the temperatures typically get down into the low 40's at night and up into the 60's or 70's during the day.
So do any of the above solutions seem reasonable? All of the solutions specify 199,000 BTU/Hr., is that reasonable? Is there anything else I should consider?
Any thoughts or suggestions are greatly appreciated.
p.s. The location of the unit does have a height constraint, which is why the Phoenix water heater is the 55 gallon model.
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