REFERENCE QTY. REMARKS ProjectLocationArchitectEngineerContractorSubmitted by DateBroan-NuTone LLC Hartford, Wisconsin www.nutone.com 888-336-3948Architectural & Engineering SpecificationsFebruary 2008DESCRIPTIONHOUSING:• Rugged, 26-gauge galvanized steel construction• Key-holed mounting brackets span up to 24” and are adjustablehorizontally and vertically• Reversible knockout bracket allows wiring from top or side• 4” round duct fitting with built-in backdraft damper for easy ductconnectionBLOWER:• Plug-in, permanently lubricated motor• Totally enclosed motor with long life bearings designed forcontinuous operation (HD80RDB, HD50RDB only)• Centrifugal blower wheelRADIATION DAMPER:• For use in 1, 2 and 3 hour rated floor-ceiling and roof-ceilingconstructions• Galvanized steel frame• High temperature, non-asbestos, reinforced fiber thermal fabric• Stainless steel closure springs• 165°F fusible linkGRILLE:• Attractive steel grille painted white• Low profile blends well with any decor80B 99043057DINSTALLATIONComplete installation instructions are included with each VentilatingFan Kit.ARCHITECT’S SPECIFICATIONVentilation Fan with Radiation Damper shall be NuTone ModelRDA with 110RDB (RDA with 80RDB) (RDA with HD80RDB) (RDAwith HD50RDB).Housing shall be made of galvanized steel and have adjustablemounting brackets. It shall have a built-in backdraft damper andbe ducted to a roof or wall cap.Blower shall be removable and have a centrifugal blower wheel.Motor shall be permanently lubricated.Air delivery shall be no less than and sound level shall be nogreater than values listed in the chart to the left. Air and soundratings shall be certified by HVI.Radiation damper shall be rated for use in up to three hour ceilingconstructions. It shall be UL Classified and Warnock Hersey Listed(see other side for installation details).Ventilation Fan with Radiation Damper shall be Energy Star®qualified (Model HD50RDB only).MODELRDARDBMODELSVentilating Fans WithRadiation Dampers(1) rough-in Kit & (1) finish Kit maKe acomplete unit. purchase each separately.Rough-In KitModel RDA • Contains housing and radiation damper(packed 4 per carton).Finish KitsModels 110RDB, 80RDB, HD80RDB and HD50RDB •Contain blower and grille (packed 4 per carton).RDA with VOLTS AMPS CFM SONES DUCT110RDB 120 1.3 110 4.0 4”ROUND80RDB 120 0.5 80 2.5 4”ROUNDHD80RDB 120 0.5 80 2.5 4”ROUNDHD50RDB 120 0.4 50 1.5 4”ROUNDSPECIFICATIONSCLASSIFIEDModelHD50RDBonly