A line of PVC and CPVC duct dampers offered in butterfly, gravity, and blast gate types for fume removal applications is available. The backdraft dampers come in three flow control types: butterfly ...

Heavy-duty, double-flanged, channel frame-style backdraft tornado dampers are designed to protect against tornados and rapid pressure changes. Installed in ductwork or wall mounted near the exterior ...

Dear Jim: Some rooms in our house are too hot or too cold, and someone is always complaining. What can we do to even out the room temperatures to keep everyone happy. Will doing this lower our utility ...