Air King Through the Wall EWF-180 Exhaust Fan, 4-5/8 to 9-1/2 in L, 11-11/16 in W, 0.8 A, 120 V, 1-Speed, Steel

Spring-loaded aluminum back draft damper prevents drafts from entering back into the room. Metal 8 in round diameter housing, vents directly to outside, includes spring-loaded aluminum back draft damper for maximum air flow. Direct to outdoor exhaust design eliminates the need for ducting. White polymeric grill. Dimensions 11-1/2 x 11-1/2 in. One-piece polymeric wheel. UL listed. HVI2100 Certified.