This is why in very cold climates the main vent stack is often full-sized and a 4-inch-diameter pipe. The larger pipe size means that much more frost must form to choke off the air supply.

The standard size of a microwave exhaust vent opening is 10″ x 3 1/4″, but you’ll have to measure your old vent pipe diameter. LaurieJean’s was 7.5″ – a rather unusual size (usually ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. INDIANAPOLIS, Ind. – This week’s ...