Centrifugal design withstanding the test of time centrifugal fan is one of the most popular application for lighting odor scrubbing and hvac. Ipower 4 inline duct fan measuring in at 190 cfm it is the perfect fan for all 4 carbon filters. This 6 inch inline ducting fan for hydroponic systems solves air delivery problems without major system rework or expense. 
				
			
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