This is a great post which describes how most commercial boilers are controlled. I’m looking at a sequence of operations for a boiler project I did recently and the hot water supply setpoint for -20F outdoor air is 145F and for +45F the hot water supply setpoint is 120F.
Most home boilers lack an outdoor air reference temp sensor but all commercial boilers have them.
Also, condensing boilers are amazing, the size difference alone vs an old tube boiler is wild, very small in comparison.
Most home boilers lack an outdoor air reference temp sensor but all commercial boilers have them.
Also, condensing boilers are amazing, the size difference alone vs an old tube boiler is wild, very small in comparison.