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Smoke shelf—A shelf below the smoke chamber and behind the damper. It collects debris and water falling down the flue. [24] Throat (waist)—The narrow area above a fireplace usually where the damper is located. [21] Wing—The sides of a fireplace above the opening near the throat. [21]
Direct digital control is the automated control of a condition or process by a digital device (computer). [1] [2] Direct digital control takes a centralized network-oriented approach. All instrumentation is gathered by various analog and digital converters which use the network to transport these signals to the central controller.
A chilled beam is a type of radiation/convection HVAC system designed to heat and cool large buildings through the use of water. [1] This method removes most of the zone sensible local heat gains and allows the flow rate of pre-conditioned air from the air handling unit to be reduced, lowering by 60% to 80% the ducted design airflow rate and the equipment capacity requirements. [2]
Air volume regulator. Variable air volume (VAV) is a type of heating, ventilating, and/or air-conditioning system.Unlike constant air volume (CAV) systems, which supply a constant airflow at a variable temperature, VAV systems vary the airflow at a constant or varying temperature.
A yaw damper may remove the necessity for a pilot to make any contact with the rudder pedals during turns on a range of aircraft, including jet-powered ones. [2] [3] Some aircraft, such as the Boeing 727 and Vickers VC10 airliners, are fitted with multiple yaw damper systems due to their operation having been deemed critical to flight safety ...
When possible, dampers, extractors, and other flow control devices should not be placed near diffusers' inlets (necks), either not being used at all or being placed far upstream. They have been shown to dramatically increase noise production. For as-cataloged diffuser performance, a straight section of duct needs serve a diffuser. An elbow, or ...
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