Air Zone Very Quiet Heavy Duty Big Room Exhaust Ventilation Fans - Panamex/Air Zone JB150, JB200, JB300
The Premium Plus Series is known as
the most quiet ventilation fan in the market.
The housing is made of steel, which is painted in black with rust proof paint,
and installed with a metal damper to prevent back draft of cold air. Each fan model comes with a significantly low noise level varying from 0.8 to 2.5 sones.