HVAC Dampers | Motorized dampers | HVAC supplies ApplicationsFunctionSummaryUseDampers are essential to the HVAC system. HVAC dampers can monitor air flow, temperature and humidity throughout homes and buildings. Some dampers are adjustable metal plates installed inside of a duct to close off or control the volume of heating and air conditioning in a specified room or area. These dampers can be motorized or manual.See more on famcomfg Dampers - Duct Accessories - The Home Depot Install Master Flow 4 in. Dampers (6-Pack) in Install Master Flow 4 in. Dampers (6-Pack) in individual runs of round pipe in an HVAC system (each sold separately) to balance and adjust the flow of air. These dampers include spring-loaded hardware and are constructed from galvanized steel to provide durability.