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What size carbon filter do I need?

How Many Filters Do You Need?                           

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Length 
Width
Ceiling Height
Total Cubic Feet 
# of Lights
We suggest that you use a Phresh® Filter closest to this CFM:

(We recommend moving up to the next largest filter if between sizes)

The Phresh® Size Selector

Choosing The Right Size Phresh® Filter

Phresh® Filters are available in 11 different sizes designed to suit any application. From a Sun Hut Indoor Grow Tent to commercial greenhouses, there is an appropriately-sized Phresh® Filter for the job.

Item No. Description CFM MSRP
701000 Phresh® Filters 4" x 8" 150 $97.95
701005 Phresh® Filters 6" x 16" 400 $161.95
701010 Phresh® Filters 6" x 24" 550 $181.95
701015 Phresh® Filters 8" x 24" 750 $194.95
701018 Phresh® Filters 8" x 39" 950 $254.95
701020 Phresh® Filters 10" x 24" 850 $211.95
701025 Phresh® Filters 10" x 39" 1,400 $282.95
701030 Phresh® Filters 12" x 39" 1,700 $342.95
701035 Phresh® Filters 14" x 39" 2,100 $377.95
701040 Phresh® Filters 14" x 48" 2,500 $406.95

Generally, the goal is to achieve one complete air exchange every 3 to 5 minutes in the growing space. If the area has higher than normal light levels the fan and filter size will need to be increase0