Product SKU:ALM-HDEF-15-100 Size:15Inch Speed:900RPM No of Blades:4 Warranty:2 Years Power:100W Air Delivery(CMM):2000 Phase:Three Current:0.29A Sound Level:50-55dB Every Almonard Exhaust Fan features a capacitor star and run type motor continuously rated, totally enclosed and ruggedly built. Designed specifically for the purpose, the motor has prelubricated double ball bearing and is provided with Class A and E insulation. The end result is a smooth, silent motor that lasts longer and deliver the maximum output at lower operating cost The impeller used in an ALmonard Exhaust Fan is of the propeller type and since both hub and impeller are dynamically balances and frames and arms mounted on rubber bushing, vibration are virtually eliminated