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PHRESH Filter - Steel Canister Carbon Filter.


made with Australian RC48 Virgin Activated Carbon


That's why we only use premium grade dust free RC48 Australian Carbon.


  • Aluminum tops and bases for reduced weight.
  • Half the weight of other filters.
  • 46mm (1.8") RC-48 activated, certified virgin carbon bed.
  • Machine packed carbon means more carbon and no movement.
  • Cone shaped internal base for optimum air flow.
  • Sealed, bagged, boxed and labeled directly after being manufactured for optimum life span, handling and presentation.
  • 51% open air custom mesh.
  • Unique "Anti Air Bypass" System.
  • Large selection of sizes available to fit any application.
  • Flange & pre-filter included.

The PHRESH® DifferencePHRESH cutaway


  • MOVES HIGHER Litres per second or Cubic Feet per Minute of Air

Demand RC48 Virgin Activated Carbon, this is what makes PHRESH Filters "The King of Fresh Air". Its all about the carbon.

To ensure total air filtration, there are several important factors to consider. The first and most important factor is carbon grade choice. Grade RC-48 carbon is derived from an ancient black coal deposit found only in Western Australia. The particular deposit is dated at over 250 million years old. After being extracted, the RC-48 carbon is kiln activated at 1200°C in a saturated steam atmosphere. It is this process together with the coals unique density that causes the pores in the carbon to form. This activation process makes the RC-48 carbon incredibly effective for the filtration of organic particles and other airborne materials. Because we use the purest available "activated virgin" carbon and our granulated carbon has more surface area than pelletized carbon, we can use significantly less carbon, thus making our filters half the weight of competitive filters. Other key factors that have been incorporated into PHRESH® Filters are a perfect combination of granulate size, carbon surface area and carbon bed depth.

         Installation is a breeze

The world's lightest carbon filters, at less than half the weight of competitors, PHRESH® Filters are easier to handle, install, transport and remove.

Standard laboratory equipment

PHRESH® Filters are used by labs, plant breeding, germplasms, tissue culture and commercial greenhouses for their total airstream filtration requirements. This professional-grade equipment is now available to hobbyists world-wide. Control your growing environment with the best filters available on the market.

More from less

CTC or "airstream removal tests" (ASTM D 3467-94) prove that our carbon can absorb 108.3% of its own weight. This is how our small, but powerful filters produce higher CFM and filtration at half the size & weight of competing filters.

Extend your filter life

To get the optimum product life from your PHRESH® Filter, it should be used with the provided pre-filter sock. This pre-filter sock catches the large dust particulates and foreign materials which if allowed to come in contact with the carbon will ultimately clog the outer surface of the carbon before total internal saturation has been achieved. When this happens it unnecessarily shortens the product life of the filter. It is recommended that the pre-filter be machine-washed or replaced every twelve months. Relative humidity should be kept below 75% at all times. Remember, carbon will absorb moisture and will take up "space" in the carbon particulate, reducing its life span.

Life expectancy

There is no given limit to the life expectancy of RC-48 carbon and your PHRESH® Filter. The total life span can only be governed by the amount of impurities absorbed by the carbon over time. The rate of air movement through the carbon bed, total air impurities and climatic conditions are the factors that determine the speed at which the porous carbon granules reach maximum capacity. PHRESH® uses only RC-48 carbon. There is a global industry standard where carbon is tested for "ID factor" and are given an "iodine number" to American ATSM standards. ID factor can simply be explained as the measurement of the amount of iodine in milligrams that can be absorbed by a single gram of activated carbon. The higher the ID factor, the higher the absorption rate. The average coal based carbon is around 500 mg/g ID. On the other hand, RC-48 carbon has a guaranteed analysis of 1050 mg/g ID. All this said, as a guide rather than a rule, we suggest that a PHRESH® Filters will last a typical user around two to three years. Some filters are still working after fours of continuous use.


FLOW RATES in Cubic feet per minute & litres per second

100mm x 300mm     150 CFM     70.8 l/s

150mm x 500mm     475 CFM     224 l/s

200mm x 500mm     750 CFM     354 l/s

250mm x 500mm     850 CFM     401 l/s

250mm x 1000mm  1400 CFM    660 l/s

300mm x 1000mm  1700 CFM    802 l/s

350mm x 1200mm  2500 CFM    1180 l/s


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 increased.



Read more product information here.

Phresh Filter Phresh Filter Poster

Available Sizes
350 x 1200mm
100mm x 300mm
125mm x 400mm
150mm x 500mm
200mm x 500mm
250mm x 500mm
250mm x 1000mm
300mm x 1000mm