Blank canvas, steel sided 40x60 pole barn. Thoughts on insulating, electrical, heating???

Johnny Mac said
Did you do the in floor pex yourself? I'm having trouble getting supply houses to Even return calls. I'm more than capable of buying pex from menards and zip tying it to my rebar....but would really like some advice on how big of spaces to leave between rows....how long of runs to do? I assume 3/4 pex....thanks in advance if you have some insight.!
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There are numerous on-line calculators for in-floor heat. I used Crete-Heat insulation panels, 1/2" Al-Pex on 6" spacing. One zone with four loops with opposing fluid flows. The three most important points are tubing spacing, loop length, and balancing parallel loops. These are all covered in the calculators.

Floor Heat - 4.JPG