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[woodwalker2010]

I'm getting ready to order materials to hook up my owb I just purchased, but was wondering about my water to air heat exchanger for my forced air. My question is, can I install the hx on the return side of the blower on the furnace and let the blower pull the warm air through it as opposed to above the blower? I have more room in this location because of the AC coil and duct work above the blower. I can put the hx above the AC coil but it would be a heck of a lot easier if I put it below it. Thanks.

[willieG]

you want it on the "clean" side of the filter. you do not want your exchanger to act as a pre filter and clog up with dust and dirt

[Dano]

I put mine on the return side . I just moved the filter above it. Works just fine

[Drivebymashing]

I also put mine on return side but couldnt fit any filters right above it
SO i can had to put filters in all return ducts in house i have three filters before it now...

[Scott7m]

If you'd want to take some pics and text/email them to me I can help take some of the guesswork out of it for you, let me know if I can help.  My number is in my signature at the bottom

[woodwalker2010]

Thanks guys. S7M, I will get some pictures for you. I'm leaning towards putting a 16x18 above the AC coil, I think I can squeeze it in but maybe the return would be less of a headache, as far as installation goes. Thanks again everyone, awesome forum by the way. Lots of great info on here.

[Scott7m]

I'd try to keep it on the supply side if I could, once you go to return side u have to make a new spot for your filter