Invented in France in 1715, was the Air Pollution Abatement Device, which was a damper designed to reduce the production of smoke from chimneys.
- Smoke dampers – Wikipedia
Smoke dampers are passive fire protection products used in air conditioning and ventilation …
- Fire damper – Wikipedia
Fire dampers are passive fire protection products used in heating, ventilation, and air conditioning (HVAC) ducts to prevent the spread of fire inside the ductwork through fire-resistance rated walls and floors. Fire/smoke dampers are similar to fire dampers in fire resistance rating, and ….