Many local codes require that exhaust fans installed in fire-rated ceilings must be protected by dampers, which, in case of fire, protect against the spread of heat and flame. Being fire-rated means the ability of a wall, floor/ceiling, or roof/ceiling to withstand the effects of fire for a specified period of time.
Broan 80RDF Description:
Many local codes require that exhaust fans installed in fire-rated ceilings must be protected by dampers, which, in case of fire, protect against the spread of heat and flame. Being fire-rated means the ability of a wall, floor/ceiling, or roof/ceiling to withstand the effects of fire for a specified period of time. Broan ceiling radiation dampers are designed to protect the openings in 1-, 2-, or 3-hour fire-rated floor-ceiling and roof-ceiling designs. When the temperature of the air passing through the damper exceeds 165F, the fusible link melts and the thermal fabric across the damper closes automatically to interrupt the airflow by becoming a flame and heat barrier, preventing rapid spread of fire to other areas.
Broan 80RDF Features:
| | Housings and finishes (motor assembly and grille) sold separately in units of four per carton - purchase housings for rough-in and blower assemblies/grilles later for finishing. |
| | UL classified (UL standard 555C) for use in 1-, 2-, or 3-hour fire-rated floor-ceiling and roof-ceiling designs. |
| | Warnock Hersey Listing allows use in combustible ceilings with ducted fans. |
| | High temperature, non-asbestos, reinforced fiber thermal fabric. |
| | Galvanized steel frame. |
| | 165F fusible link. |
| | Stainless steel negator-type closure spring. |
| | Available from 50 CFM to 110 CFM. |
| | Radiation damper comes attached to housing. |
| | Blower assembly will fit into housing without the removal of the radiation damper - one less step in installation process. |
Broan 80RDF Specifications:
CFM: 80
Sones: 2.5
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