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I have an old 20x20 detached garage turned workshop. (No garage door and lots of windows.) It has natural gas supplied to it. I'm having a new floor poured soon and would like to place pex in the slab. I've never done this before but am handy enough to DIY. I realize it is probably an unconventional setup for hydronic heat, being so small of a space. Hence, some basic questions:
At 1 ft spacing, should I run one 400 ft loop of 5/8" or two 200 ft loops of 1/2"?
If I also add a sink to the room, closed or open system?
Boiler or tankless water heater?
Also, what are ways I can keep the system efficient in terms of energy consumption? Model numbers to look at for the mechanicals?
Thanks in advance.
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