Hearth dampers are fireplace-shielding units which can be used in HVAC units. These are meant to cease the fireplace from spreading in the ducts. At a set temperature, the fireplace damper shuts and kinds a barrier that forestalls the fireplace from spreading with the ducts. HVAC dampers are Unique products https://aircontroldampersforengin35677.popup-blog.com/35644687/indicators-on-air-control-dampers-for-engine-sheds-you-should-know