I have 6 zones in a 2.5 story building. The lower lever has radiant heat and the 2 other floors have baseboard heat. The boiler usually runs at 160-180 degrees and there is a mixing loop that mixes some of the return water back with the supply to feed the radiant zones. Is there a maximum temperature to feed into the radiant floor pipe?? I don't want to risk cracking the copper radiant pipes that are buried in the concrete slab
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Maximum Temperature for Radiant Heat