The problem of dirt collecting around ceiling diffusers has been a concern in the air distribution industry for a long time. Some people have asked about this dirt and the impact on indoor air quality ...

Question:We have seven-inch round ducts in the ceiling of our house, for heating and air conditioning. In a little-used room, we’ve never bothered to find ceiling diffusers for them. Now that we’d ...

With energy costs going through the roof and no relief in sight, HVAC system designers and specifiers are taking a much harder look at the many choices in ductwork available to them today. One ...