We have written before that round spiral duct should be your first choice for a rooftop HVAC duct system. The round shape reduces snow accumulation and accelerates rain runoff compared to rectangular ...

Transitions are needed in almost every duct run to change the size or shape of the ductwork. This article explains how to lay out rectangular transitions. A duct run is often kept flat on the top to ...

Chauncey grew up on a farm in rural northern California. At 18 he ran away and saw the world with a backpack and a credit card, discovering that the true value of any point or mile is the experience ...