what is ductwork in hvac - An Overview
IDHE-O The IDHE-O can be a duct heater that is certainly UL listed for outside programs. This duct heater might be mounted in a number of positions much like the IDHE.Some cooling contractors could possibly propose utilizing “flex duct” (a small, cheap adaptable hose) instead of rigid square ducts. But keep away from flex duct in active closet