What To Do If the connection from the combustion air duct to the return plenum is visible inside the house, the fix for this situation is simple: have the combustion air duct disconnected from the ...

The Unico System has revolutionized the connection system for its flexible supply tubing, reducing the steps and time involved in the installation of its products. The longtime leader in small-duct ...

NEC cabling installation requirements are straightforward, but markings and new offerings may create confusion. You're not alone if markings and listings are making your plenum cabling selection a ...