I don't know as if it matters but, I'm with KLook. If demand is big, and you are going to need heat, you had better be making heat. Get ready for the next call from thermostat. If outside temps are higher, and the boiler doesn't need to be cranking, it will idle back anyways. Then the long slow idle fire will continue to build / store heat. And that's my opinion.KLook wrote:Not sure where you are located but the guys in the more temperate areas(not so cold) can get away with things that others cannot. When it is cold, make heat. That is the only thing that works. I agree that pumping only enough heat to satisfy the demand for longer periods is better for comfort(shorter swings in temp from high to low) but to make the heat needed, getter done. Much is discussed about having oversized boilers that idle to much, and much is discussed about having undersized boilers that run to hard.