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Does anyone know of a good 12x12 vent for a boiler room that can be shut sometimes when cold out?
I have a customer where the boiler is being built on the second floor. The boiler room is right on the external wall and the inspector wants a 12x12 opening at the top of the room and a 12x12 opening at the bottom of the wall in the boiler room. The pipes are a few inches away from the outdoors and I am concerned that if I put a regular vent, then on a freezing cold day the pipes might get too cold even though I am going to put fiberglass insulation. Is there a kind of vent that anyone knows of that has a shutter that can be closed or even somewhat closed on a very cold day?