Yeah, until my new radiator, cooler wasn't really possible
30 year old Westinghouse boiler radiator, original fan. Built like tank, from an era where quality mattered and steel was apparently free. Radiator + 1/3 hp pump + 40 degree weather makes 9k worth of lights seem irrelevant.
Are you sure no copper? Seems weird, esp. since copper is already added to nutes and used for water lines.
Guess I'll find out, since even though I *think* the radiator is stainless, I know the fittings to it are copper (only a couple feet, resoldered it and hooked it to threaded 3/4" PVC b/c is 20x cheaper)