I am wanting to program our programmable thermostat to 6 degree swings (daytime versus nighttime). My question is, will this cause excessive wear and tear on our boiler system? Thank You!
it wont cause anymore wear and tear on it than using a regular thermostat. when you come home and it has to heat up that 6 degrees that you want it to, its actually good for the boiler. think of a boiler like a car, if you drive them on the interstate they last longer than if you drive them in town. My point being that the longer you run a boiler the better as opposed to short cycling it by making it kick on and off. thats why when you size a boiler or a furnace you should lean toward the smaller size that you think will work because you want it to come on and run for a while rather than start up run for 30 seconds and kick off.