NWE STILL IN BOX
Airtech Carbon XL air filtering system - 2500 CFM:
Best price intown you won't find one cheaper going fast at the low price of $650.00 obo open box never used retail at $819.00 Dutch Hydroponics 1246 23rd Ave Oakland Ca,94606 (510)535-2400 Airtech has developed a unique pre-exhaust odor control filtering system for use with your exhaust fans. Most carbon filters are commonly used as an exhaust intake, or recirculating polishing filter. But Airtech's Carbon filtering system provides a flow-through design that is unique only to this filter.
The fan CFM requirement is intended for a centrifugal type fan to acheive the correct contact time for the air passing through the carbon. With the correct contact time, the air is exposed to the carbon long enough to insure that the air is cleaned sufficiently. The CFM's are important to acheive the correct pressure to utilize all of the carbon. If you used a different fan, the air pressure passing the filter would not be enough to use all of the carbon cartridge surface. It may still work with a less powerful fan, but the carbon may not last as long as it should. A fan that was too powerful would not allow enough exposure time for the air to be cleaned properly. 2500 cfm
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