Ventilating fan with grill having high static pressure resistance

Abstract

A bathroom-ventilating fan with grille having a fan hosing, fan scroll, inlet ring, outlet collar, fan grille, sound insulation and electrical box. The external motorized assembly backwardly inclined type impeller is used. The bathroom-ventilating fan with grille has multiple speeds controlled by multiple capacitor and has the performance with 100 CFM airflow rate at or higher than 1 inches static pressure, 5 Sones or lower than 5 Sones of HVI (Home Ventilating Institute) certified sound ratings and 3.08 or higher than 3.08 CFM per watt power consumption at 0.1 inch static pressure as well as the fan has the performance with 50 CFM at 0.4 or higher than 0.4 inches static pressure, 1 Sone or lower than 1 Sone of HVI certified sound ratings and 1.36 or higher than 1.36 CFM per watt power consumption at 0.1 inch static pressure.

We claim: 
     
         1 . A ventilating fan comprising a fan housing with a fan scroll having an impeller, an inlet ring and an outlet collar with a back draft damper, the fan housing including a fan inlet grill, sound insulation, and electric motor, wherein the impeller has backwardly inclined blades. 
     
     
         2 . A ventilating fan according to  claim 1 , wherein said fan is used to exhaust air from a bathroom. 
     
     
         3 . A ventilating fan according to  claim 1 , wherein the fan has a performance of 100 CFM airflow rate with at least 1 inch static pressure. 
     
     
         4 . A ventilating fan according to  claim 3 , wherein the fan has a performance of 49.5 CFM airflow rate with at least 1 inches static pressure. 
     
     
         5 . A ventilating fan according to  claim 1 , wherein the fan has no more than 5 Sones of HVI (Home Ventilating Institute) certified sound ratings at 0.1 inch static pressure. 
     
     
         6 . A ventilating fan according to  claim 5 , wherein the fan has no more than 1 Sones of HVI (Home Ventilating Institute) certified sound ratings at 0.1 inch static pressure. 
     
     
         7 . A ventilating fan according to  claim 1 , wherein the fan has a power consumption of 3.08 CFM or more per watt power consumption at 0.1 inch static pressure at a high speed setting. 
     
     
         8 . A ventilating fan according to  claim 7 , wherein the fan has a power consumption of 1.36 CFM or more per watt power consumption at 0.1 inch static pressure. 
     
     
         9 . A ventilating fan according to  claim 1 , wherein the electric motor has different speed settings controlled by at least 2 capacitors. 
     
     
         10 . A ventilating fan according to  claim 9 , wherein the capacitors are 6 λF capacitors. 
     
     
         11 . A ventilating fan according to  claim 9 , wherein the capacitors are 1.2 λF capacitors. 
     
     
         12 . A ventilating fan according to  claim 1 , wherein the fan has sound insulation inside the housing.