Ľ 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.
Model RDH with Model HD50RDF is ENERGY STAR« qualified.
Ľ UL classified (UL standard 555C) for use in 1-, 2-, or 3-hour fire-rated
floor-ceiling and roof-ceiling designs.
Ľ Warnock Hersey Listing allows use in combustible ceilings with ducted fans.
Ľ High temperature, non-asbestos, reinforced fiber thermal fabric.
Ľ Galvanized steel frame.
Ľ 165░F fusible link.
Ľ Stainless steel negator-type closure spring.
Ľ Available from 50 CFM to 110 CFM.
Ľ Radiation damper comes attached to housing.
Ľ Blower assembly will fit into housing without the removal of the radiation
damper - one less step in installation process.
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 165░F, 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.