Author name: admin

A building material installed to prevent the movement of air, smoke, gases, and flame to other areas of the building

A device that maintains a desired draft in a gas appliance by automatically reducing the draft to the selected value.

A chisel esp. used for cutting a border or line at the edge of a stone.

1. A device fitted into or on top of a flue to prevent downdrafts. 2. An open enclosure over a

In glazing where putty is not used, a fillet on which the glass rests.