From the Manufacturer
The Allure II provides the style and performance you demand and with Dupont Teflon, the easy clean-up you want. The new Allure range hoods Allure II series ducted: 3 1/4-by-10 110/240 cfm - 1 0/4 5 sones vertical 110/250 cfm - 0 9/3 5 sones horizontal ducted - 7 round 110/230 cfm - 0 8/4 0 sones vertical non-ducted--converts to non-ducted add non-ducted filter available separately description very quiet 0 9 sones at normal speed powerful 250 cfm high setting (more...)