QWe 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 ...

The AE family of extruded aluminum, square ceiling diffusers is available. The particular series names (AE1, AE2, AE3, AE4, and AE5) denote the diffusion patterns (one, two, three, and four-way and ...

Eger Products Inc. (www.egerproducts.com) showcased its plastic ceiling air diffusers, which spokesman David Koebbe said are ideal for restaurants, office buildings, hospitals, and clean environments.