They're set up inside the HVAC ductwork and therefore are triggered to close once they sense smoke. Smoke dampers are generally made from aluminum and also have a motorized actuator that closes the damper. “HVAC dampers are classified as the unsung heroes of house comfort, silently working to build an https://trevorsldth.boyblogguide.com/35434634/a-review-of-air-control-dampers-for-hot-climates