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Never installed a two temperature system before and trying to decided the best way to set one up. The project is a house with a mixture of tubing embedded in concrete slab and Warmboard. The low temp requires 9GPM, with a output of 63,000 BTU, using 100 degree water. The high temp requires 6.5 GPM, with a output of 45,000 BTU, using 120 degree water. The heat source is a Triangle Tube Solo, that will be set for the 120 degree water and thinking of using a three way mixing valve with outdoor reset for the low temp, either a Califfi NA164 or a ESBE 62.
I know their is a lot of options available and was hoping to get someones opinion on this.Thanks