Models 0755(A) and 0756(D) Ceiling Radiation Dampers have been designed and tested for simple installation in specific UL design wood truss ceiling assemblies. They are UL Classified for use in specific 1 hour rated UL floor /ceiling and roof/ceiling designs. Model 0755 ships complete with thermal blanket and top inlet round duct connection. Model Series 0756 features a factory provided sheet metal plenum for steel grille/diffuser mount or ducted applications with duct collar(s). Models 0757-CB/-DB/-EB and 0763-FB/-GB come with a variety of plenum options or steel grille/diffuser mount applications. Models 0755/0755A are listed for UL designs L528/L546/L550/L558/L562/L574/L576/L579/L581/L583/L585/L592/M501/M503/M526 and roof/ceiling design numbers P531/P533/P538/P545/P547/P549/P552/P570/P580. Models 0756/0756D are listed for UL designs L528/L546/L550/L558/L562/L574/L576/L579/L581/L583/L585/M501/M503 and roof/ceiling design numbers P531/P533/P538/P545/P547/P552. Models 0757-CB/-DB/-EB and 0763-FB/-GB are listed for UL designs L528/L546/L550/L558/L574/L576/L579/L581/L583/L585/M503 and roof/ceiling design numbers P531/P533/P545/P547/P552.

Nailor 0757, 0757D, and 0763 Ceiling Dampers for use in Wood Truss ceilings are component dampers for use with field fabricated plenums (by others). Models 0757/0757D are listed for UL designs L528/L546/L550/L558/L562/L574/L576/L579/L581/L583/L585/M501/M503 and roof/ceiling design numbers P531/P533/P538/P545/P547/P552. Model 0763 is listed for UL designs L528/L546/L550/L558/L574/L576/L579/L581/L583/L585/M503 and roof/ceiling design numbers P531/P533/P545/P547/P552.  

Nailor ceiling dampers, or ceiling radiation dampers as they are commonly called, are designed to function as a fire and heat barrier in air duct openings penetrating fire resistive membrane ceilings. Models 0716, 0716A and 0714 are for use in square or rectangular applications, in lieu of hinged door type dampers in any UL floor/ceiling or roof/ceiling assembly with up to a 3 hour fire resistance rating where air ducts are allowed.

Nailor Model 0722 Ceiling Dampers are for use in round applications, in lieu of hinged door type dampers in any UL/ULC floor/ceiling or roof/ceiling assembly with up to a 3 hour fire resistance rating where air ducts are allowed. Exteneded collar models 0722-SE and 0722-LE available. Adjustable models 0722A, 0722A-SE, and 0722A-LE available.

Nailor 0716-4 is ideal for installation in tight places that require a fire and heat barrier in air duct openings penetrating fire resistive membrane ceilings. Adjustable model 0716-4A for volume control available. Model 0720 ceiling radiation damper, which functions as a fire and heat barrier in air duct openings that penetrate fire resistive membrane ceilings, is for use in lieu of hinged door type dampers in any UL floor/ceiling assembly with up to a 3 hour fire resistance rating where air ducts are permitted.

Models 0725 and 0726 Thermal Blankets are designed to insulate the exposed back pan area of a steel ceiling diffuser that may be used in UL Classified floor/ceiling or roof/ceiling assemblies with up to a 3 hour rating. The insulation protects the floor/roof structure above from the intense heat that radiates through the diffuser pan during fire conditions. A thermal blanket is used in conjunction with a ceiling radiation damper that protects the neck opening of the diffuser, to provide complete protection of the opening in the ceiling membrane. Model 0725 thermal blanket is for use with 0722 ceiling damper models in round neck applications. Model 0726 thermal blanket is for use with 0714, 0716 and 0720 ceiling damper models in square neck applications.