wreckit,
Appreciate the reply. I had already posted it this, but am on moderator probation. LOL
I would like to separate the systems with a heat exchanger so the floor is a closed system. I have a 1740 sq. ft. house and a 2480 sq. fit connected shop I am trying to heat. Eventually I will add DHW, but for now, just want to get the floor heat up and running
Looks like I should use 1 1/4 for the long run. Taco chart shows a max flow rate of 11.2 GPM for 1 1/4.
Suggestions on what size heat exchanger to use that won't restrict the flow rate? If all zones are calling for heat, flow rate will be around 15 GPM on the radiant side with 120* water.
Have 2 zones in the house, 1/2 inch, 3 loops each. 1 zone in the shop, 7/8 inch, 7 loops. All loops are 300ft.
What am I missing or need to do different?