Resilient anti-vibration motor mountsDynamically balanced polymeric centrifugal blower wheel for quiet, efficient performanceLow profile styling grille blends with any decorRugged 20 ga galvanized steel housing with 0.5 in acoustic insulation inside8-position mounting brackets for easy installation and greater adaptability to various mounting requirements, automatic backdraft damper located within duct connectorMay be installed as an in-line ventilator with addition of accessory kit model 981L, for controlling use model 57V (ivory)/57W (white) 3 A, electronic variable speed control or model 59V (ivory)/59W (white) 60 min time control or model 61V (ivory)/61W (white) 15 min time control or model 71V (ivory)/71W (white) 12 hr time controlSuitable for kitchen installationPlug-in permanently lubricated thermally protected motor designed for continuous operationLow rpm for quiet operation blower279 cfm at 0.1 in SP horizontal, 280 cfm at 0.1 in SP vertical277 cfm at 1/8 in SP horizontal, 3.1 Sones, 277 cfm at 0.1 in SP at 1/8 in SP vertical, 3.7 SonesRound ductUL listed for use over bathtubs and showers when connected to a GFCI circuitSquare shape grille790 rpm horizontal, 815 rpm at 0.1 in SP vertical AC motorReliable unbelievably quiet, offering the cfm choices you need at the lowest soundLow rpm motor for quiet operation with resilient anti-vibration mounts, dynamically balanced polymeric centrifugal blower wheel for quiet, efficient performancePermanently lubricated, plug-in, thermally protected motor designed for continuous operation, low profile styling grille conceals interiorR8-position mounting brackets for easy installation and greater adaptability to various mounting requirements, automatic backdraft damper located within duct connectorCan be ducted horizontally or vertically with in-line ducting available with separate adapter