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Topics - Flyboy206

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Plumbing / Manifold diagram or pics
« on: January 16, 2018, 01:01:29 PM »
Going to collect the pieces and parts for my manifold this week. Looking for pictures or drawings to follow.

This will be the closed  loop coming from the heat exchanger to the 3 floor zones. From earlier discussions on here, 1 1/4 copper to and from the HX. Mixing valve and pump for each zone. Expansion tank and air vent. Suggestions on placement of ball valves and drain and fill? Will the check valves in the circulators be all that I need?

Appreciate the input

Plumbing / Primary loop PEX size
« on: December 16, 2017, 11:04:16 AM »
Been lurking and reading on here for a year or so. Finally getting ready for the install.
Have a few questions, and this board is a wealth of knowledge.

I am setting up in slab floor heat, 3 zones. Two for the house and one in the attached shop. Have a mixing valve, relay, and each zone has a dedicated pump.

Total BTU required when all zones call for heat is calculated at 94,732 BTU. Will be using a G200 for heat.

My question is sizing the primary loop and max flow rate. Total run is about 214 ft.  My numbers tell me I need 9 to 10GPM in the primary to keep a 20 degree temp diff on the return when all the zones are calling for heat. Once the floor is up to temp, will the 1" Thermopex work to keep the temps stable?


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