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Mixing under-floor radiant with wall panels okay?
Two years ago I installed an IBC SFC-199 boiler and hydronic pex floor heating (metal plates, under subfloor, between joists, insulation below). I did not know at that time that the floor has, in some locations, 2" thick of flooring, making the under-floor heat not work particularly well.
The house is old and has been enlarged in odd ways over the decades, so the basement is only underneath a portion of the first floor.
For the parts of the first floor (supported by concrete piers) not over the basement, I installed electric (pure resistive) wall hung heaters. Two years later and several of the heaters have failed -- and I wouldn't be surprised if more will fail.
I am in zone 5A (but it often feels like a 4 (;-).
So now I am thinking I need to add hydronic heat to those rooms that use electric (at least on the 1st floor -- I have no idea what I'll do for the 2nd and 3rd floors).
Can I just add several zones (and a controller) to the system (with with its own pump) for wall hung hydronic panels?
Is there a mix-and-match problem with 1 zone being under floor and another zone (or 3) being wall panels?
I'm concerned that the one zone I currently have has 4 circuits and approximately 800 linear feet of radiating tubing, while the new zones will be completely different.
Which leads me to my next question: How can I determines how many radiators to put on each circuit of the new zones?
Below is a layout of the house. The outer rooms in green are not over the basement.
The purple rectangles are my thoughts for 1 zone of panels.
Red for another zone of panels.
Brown for a 3rd zone.
Below is also a picture of my setup (I'm not a pro, as any pro could tell).
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