The older 4 inch vent

We are one of the few, if not the only, company that makes a vent shield for the old style 4 inch vent normally found on homes built prior to 1960. Occasionally you may run into one in a modern home, but most modern construction has moved to standard 2 inch vents throughout. So if you have an older home and want some CQs, make sure you watch the video on the “order critter quitter” page on how to measure your vents.