heating ventilating and air conditioning hvac air distribution air duct accessories dampersDampers - 23 33 13
As used with forced air HVAC systems, Dampers are devices used to vary the volume of air passing through an inlet, outlet or duct. They consist of one or more blades and may have an actuator. The actuator is a motor or a manual lever which respositions the blade or blades. The blade(s) controls the direction and volume of air as it passes through a duct or into a space. Types of dampers include back-draft, balancing, fire, smoke and combination fire/smoke dampers.
Dampers Industry Associations:
Tips on Estimating Damper Costs from RSMeans
 | Review all construction documentation before proceeding with the estimate for HVAC. It is not unusual to find items on the plans, but not in the specifications; or they may be in the specifications but not on the drawings. Also check any and all communications; the owner may have requested a change or expressed a concern or a specific need, and not have had it included in your drawings or specifications. |
