I have an addition with radiant heat and a 15,000BTU heat loss. I want to use an Everhot heat exchanger off my steam boiler to heat the water. The Everhot also heats a small room with baseboard and a 10,000BTU load.
I need a control for a mixing valve that will take 180* water in the Everhot tank and temper it between 120* and 155* for the radiant loop, depending on the outdoor temperature. My room with radiant needs the 155* when the outdoor temp is below 15*F. I have been manually changing the temp when it gets real cold. Using Onix staple-up, which is why I need the higher temps.