What are PolarAfrica filters?

PolarAfrica humidity and bacteria control filters are:

  • 100% natural mineral (known as Sorbite)
  • 100% recyclable
  • environmentally friendly
  • non-toxic
  • non-corrosive

They comprise:

  • plastic or aluminium tray
  • polypropylene bag filled with Sorbite
  • bag lies in tray and are
  • attached to the ceiling of a cold room or under bar fridge with magnets (no drilling required!)


Plastic tray
(size of laptop)

Aluminium tray

Polypropylene bag filled with Sorbite

PolarAfrica filter ready to be attached

Fitted to ceiling of cold room
With magnets

Seen in cold room

How do PolarAfrica filters work?

Water molecules are ever present in cold rooms, and as they move through the air, any food spoilage gases (ethylene and pectin gases), acetic acid and/or air-borne bacteria which are present attach themselves to the molecules and in this manner cross contamination arises and odours permeate the internal air.

Contaminated molecules are a common occurrence in the cleanest of cold rooms and there is nothing you can do about it … that is until today! Contaminated molecules leads to food spoilage in fresh and prepared exposed meat, fish, pastry, cakes, fruit, herbs, vegetables, dairy products, chicken, berries, strawberries, etc. Even food kept in sealed containers does not escape contamination for when the lid is lifted the produce comes into direct contact with the contaminated molecules.

When PolarAfrica filters are fitted in a cold room, the contaminated molecules move through the 100% natural mineral, known as Sorbite, and the food spoilage gases, acetic acid and air-borne bacteria are retained in the mineral. Much purified water molecues emerge and and the internal air of the cold room is relatively free of contaminants (82% less air-borne bacteria, 79% less ethylene gas and 95% less acetic acid).

Simultaneously, the mineral absorbs and retains any excess moisture in the air only releasing same when conditons become too dry (normally after hours when the doors are kept shut for hours and the evaporator fans dry out the cold room) and shrinkage arises as a result of the perishables having to give up moisture.

The filters have to be exchanged every 4 weeks, by PolarAfrica personnel, to
have the food spoilage gases, acetic acid and air-borne bacteria removed from the Sorbite

What is the use of PolarAfrica filters in a refrigerated unit?

PolarAfrica filters constantly absorb and retain:

  • 82% air-borne bacteria
  • 79% ethylene and pectin gases
  • 95% acetic acid

and they also simultaneously:

  • Absorb and retain excess moisture when present (up to 60% of their weight in water)
  • Desorb retained moisture when conditions become too dry


  • Stabilizing relative humidity maintaining perfect moisture balance between 75% to 88%
  • Neutralizing vapour pressure
  • Lowering ambient and core temperatures
  • Reducing energy consumption by between 10% and 20%
  • Reducing temperature recovery by times 50%
  • Eliminating/reducing rust
  • Eliminating wet floors increasing safety of personnel
  • Reducing temperature recovery times by 50%

PolarAfrica filters substantially reduce cold room odours

What benefits do they offer the business sector?

PolarAfrica filters offer the following sustainable benefits for any business utilising refrigeration:

  •  Increase in shelf-life of all cold room perishables by between 50% and 300% (both fresh + prepared, depending on type and quality when purchased)
  • Butchery meat weight loss reduced by 40% to 50% over 4 to 6 days!
  • Energy consumption reduced by between 10% & 20%!
  • HACCP management tool for all refrigeration units
  • Reduced food input costs = improved gross profit margins on ALL cold room designated perishables
  • In the event of a power outage, the filters will maintain cold room perishables in good order for at least 12 hours (provided the door is not left open).
  • Reduced carbon footprint

Any HACCP & ISO benefits?

PolarAfrica filters play a vital role in any HACCP (hazardous and critical control points) programme in that the following critical control points which have been identified in general walk-in cold rooms can be remedied by fitting PolarAfrica filters as a corrective action.

See example of a HACCP poster placed on a cold room door where PolarAfrica filters have been fitted.

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