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AMCA Publication 502 - Damper Application Manual for Heating, Ventilating, and Air Conditioning is a guide to understanding the various types of dampers available and items to be considered for their proper use. Dampers classified as fire dampers, heat dampers, and smoke dampers are not included.
A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air-handling equipment. A damper may be used to cut off central air conditioning (heating or cooling) to an unused room, or to regulate it for room-by-room temperature and climate control - for example, in the case of ...
This may be achieved through mechanical means (i.e. the use of a louver or damper for air intake and a fan to induce flow through ductwork) or through passive strategies (also known as natural ventilation). While natural ventilation has economic benefits over mechanical ventilation because it typically requires far less operational energy ...
Clean air delivery rate (CADR) is the amount of clean air an air cleaner provides to a room or space. When determining CADR, the amount of airflow in a space is taken into account. For example, an air cleaner with a flow rate of 30 cubic metres (1,000 cu ft) per minute and an efficiency of 50% has a CADR of 15 cubic metres (500 cu ft) per minute.
Air transfer fire dampers for doors are designed and tested for use in the lower part of door leaves and cannot be installed elsewhere or higher. In Europe, the fire door test EN 14600 and EN 1634-1 applies. Air transfer fire dampers in facades are vents applied in wall, eave soffit, gable or foundation. In the US, these are used to protect ...
The patent envisaged the control of both warm and cool air although the Thermotank installed in Kostroma delivered warm air only. In 1900, Alexander William Stewart with his brothers William Maxwell Stewart (1875-1926) and Frederick Charles Stewart (1878-1950), established the Thermotank Ventilating Company, with offices at 55 West Regent ...