HVAC uses of flexible air duct have grown exponentially over the last two decades, all over North America. Contractors and installers say they like it, and some find it indispensable. It has changed ...

GLV International Ltd.’s new insulated and uninsulated Square Flexible Air Ducts are all UL 181 listed flexible air ducts specifically designed for installation in areas with restricted or limited ...

The requirements for installing wiring in ducts not used for air handling are listed in Sec. 300.22 of the 2011 NEC. As noted in 300.22(A), "No wiring systems of any ...

Dear Jim: After the heat wave we have had recently, I think we need to add central air-conditioning. We have electric baseboard heating, so there are no ducts. What are the simplest central system ...