They can be installed inside the HVAC ductwork and they are induced to close when they feeling smoke. Smoke dampers usually are manufactured from aluminum and possess a motorized actuator that closes the damper. We are not able to total your ask for on account of a technical issue. You https://aircontroldampersforhotcl78900.shoutmyblog.com/35652104/the-fact-about-air-control-dampers-for-hot-climates-that-no-one-is-suggesting