A duct damper is a device used in a conditioning heating, ventilation and air conditioning (HVAC) duct. A duct damper can help control the flow of this air, or can prevent air from entering specified areas. By regulating air flow through the damper can be used to control the temperature and humidity levels, restrict the flow of hazardous fumes or smoke, or simply give owners more control over comfort levels and currents air.
Guillotine dampers are designed to block the entire pipe so that air can not enter a specific area. These dampers can take a number of different ways depending on the desired function. A duct damper mechanism can contain a rotating flapper-type, which will pivot back and forth within the duct to control airflow. May also contain a vent or ventilation rate mechanism, which can slow or redirect the flow of air, but is ineffective in blocking airflow completely.
Mini Split Air Conditioners – Duct Damper Models.
As the thermostat adjusts the dampers are automatically activated to increase or decrease the air flow. They are designed to prevent the spread of smoke and flames through the ducts of the building. Many smoke detectors contain integral air enables recording when smoke is present. Others have a type fuse element which melts close the damper once the temperatures reach a certain level.
Portable Air Conditioners – Manual Operating.
Most dampers are also available with an operating manual. They typically operate using a handle or switch located on the exterior of the duct. Users should turn this handle to open or close the gate, both the volume control and smoke control. Although this option is simple and affordable, it can be impractical in emergency situations, when operators must activate the line before leaving the building.
Mini Split AC in the USA 