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Need help calculating tankless water heater size for Pex radiant heat
Apologies if this has already been answered.
I'm trying design and install a DIY pex radiant heating system in my 1989 ranch house. Here are the numbers:
-Built in 1989, moderate insulation, have a lot of windows.
-unfinished basement, have access to joists
-joists are 16 inches apart, plan on doing pex in between joist installation.
-Floor is made up for 5/8 subfloor with 3/8 engineered hardwood floor.
-Live in Michigan, close to Detroit
I was planning on doing a closed system with a tankless water heater. I want to get a an idea of what size tankless heater i need and whether there are some recommendations in this department. I'm not finding a clear guide when it comes to this.