Originally Posted by pinback
i like that container. manifold is your most economical solution. make one that is big enough, and channeling shouldn't be too much of an issue
and what is your plan for insulation or maintaining heat? recirc/electric?
I am an insulation guy, so I have materials available. I plan to use polyurethane spray foam insulation. We have 200 bd ft kits, which are for contractor use and much better application than the can stuff(which doesn't really apply well to a large flat surface area). I plan to add 1 inch, which will give me an R-5. I am going to test it and see if that is satisfactory.
I may add a layer of reflectix over that if needed. The thing I see people miss is that Reflectix has a very small R-value. The air space in the bubbles is actually only R-1.1(from conduction). The only way you get a value from it is if you are somehow stopping RADIANT heat transfer. In order to stop radiant heat transfer (which is heat transfer across an air space), you MUST have an air space. It barely helps if you wrap a MLT in Reflectix without an air gap. That air gap must also be air tight. So, I will install 1/2in furring strips around the foamed MLT, then a layer of reflectix. This will then be reflecting the radiant heat transfer from the heated up foam back to the MLT. The key is that air gap must be air tight, or Convection will ruin the whole gain by the Reflectix application. So, I will be sure to tape the seams well and have a space at the top, which is uninsulated so the tape can adhere.