Ceiling and Inline centrifugal fans are designed and constructed to create a quiet and reliable product. Extensive combinations of wheel sizes and speeds enable the Zephyr to cover a wide range of CFM. All Zephyrs feature acoustically insulated housings, custom designed blower and motor pairings, motor mounted on vibration isolators, and for all but the smallest Z3H, dual inlet blowers. Click here for more product information: https://www.pennbarry.com/Catalog%20Home/Commercial/Commercial%20Centri…