Morning , newbie and green but just sharing what I did and what worked for me, doesn't mean its right , I asked the same question regarding my greenhouse and pretty much all the same people answered as did in your post ,. all excellent advice
I used a 22 x 22 heat exchanger ,
this fan from amazon ,
http://www.amazon.com/gp/product/B0010041GS/ref=oh_details_o03_s00_i00 and this thermostat, 120 volt
http://www.amazon.com/gp/product/B000E7NYY8/ref=oh_details_o02_s00_i00 I didn't go the 3 way valve as this is in a greenhouse and any heat that escapes goes into the greenhouse anyway , I figured keep it simple and I could add it later if need be , basically my pump runs 24 x7 and when it calls for heat the fan kicks on , when its not on the coil is warm and yes you lose some heat into the room but very little , I don't feel as its wasted ,
I framed a wooden frame , mounted the fan behind it , set it on hi , then I cut the power cord extended it and located it on the other side of greenhouse plugged into an outlet ,
my greenhouse is 30 x 48 x 14 ft tall in the center , only 2 layers of 6 mil plastic, this is heating it all evenly and consistently , I have it set for 55 degrees and it stays with 3-4 degrees even if it drops outside as it did night before last to 19 degrees all night , I couldn't be more pleased with the way it working, its even , i don't have all the moisture from rapid temp changes , plants and cage birds are all doing well, I dont have to come out and load the rural king furnace at every 4 hours @ 2 oclock in the morning anymore
I can get some pics later today if you want some , like i said , its simple and it works , I can modify and change it later if need be , 3 way valves aren't cheap, try it without and you can add it later ,
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Topic: building a air handle for my owb (Read 2950 times)