Air King EWF-180 Through the Wall Exhaust Bath Fan with 180-CFM and 6.5-Sones, White Finish N/A Made in US Wall exhaust fan comes with white polymeric grill that measures 11-1/2" x 11-1/2" Operates at 180 CFM at 6.5 scones for maximum air flow, and direct-to-outdoor exhaust design eliminates the need for ducting Spring-loaded aluminum back draft damper helps with back drafts and contributes to superior air flow All-metal housing can be installed into walls from 4 to 9" thick, while venting directly to the outside, making it perfect for exhausting garages Metal, 8" round diameter housing also helps with air flow, and allows the fan to vent directly outside White Through The Wall exhaust fan provides ventilation Ideal for applications such as exhausting garages Speed setting operating at 180-CFM at 6.5-Sones Suitable for bathrooms up to 160-square feet and other rooms up to 225-square feet Comes with a 1-year limited warranty