Glossary

To allow material to harden under normal atmospheric pressure and temperature.

Hydraulic cement which contains an air-entraining agent in an amount such as to cause air to be entrained in the

1. An air-exhaust unit used to carry away odors and fumes from a stove, griddle, etc.; may contain a grease-extracting

The ratio of the volume (or weight) of air being furnished for combustion to the volume (or weight) of the

An assembly of air-conditioning components (such as fans, cooling coils, filters, humidifiers, and dampers) integrated into a selfcontained package and

A suspended acoustical ceiling in which the board, perforated metal, or tile is provided with small, evenly distributed mechanical perforations