Commercial Air Filters

They remove odors and improve indoor air quality. Commercial kitchen fans also remove moisture, which can increase the level of humidity. High humidity can cause mold, mildew and bacteria growth which can ultimately result in major health code violations. Common Exhaust Fan Systems The two most common types of fans are impeller fans and blower fan.. Most commercial kitchen exhaust systems have an exhaust fan, ducting and a hood. Some buildings have a central exhaust system, which is one or more fans, drawing air from the entire building (or parts of it) using a network of ducts.