Performance certified is for installation type D – Ducted inlet, Ducted outlet. Performance ratings do not include the effects of appurtenances (accessories).
The sound ratings shown are for loudness values in spherical sones at 5ft. (1.5m) in a spherical free field calculated per Annex B of AMCA 311. Values shown are for installation Type D : Ducted inlet spherical sone levels. Ratings do not inlcude the effect of duct end correction. All sone values shown are calculated at 0.1″ (static pressure in inches W.G.).
* Speed (RPM) shown is nominal. Performance is based on actual speed of test.