I am remodeling my shop and that means moving my exhaust system.
Sometimes I forget to close all the blast gates on my exhaust system as soon as I am done running the lasers and during the winter I assume a lot of warm air finds its way out of the building because of open blast gates.
So my question is would putting some type of P trap on in my system prevent the warm air from leaving the building? Or will the air keep right on going as if it wasn't there?