Product Code: 59002, 59003

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Concentrated heat transfer fluid for Air and Ground Source Heat Pumps. Designed to protect from -14 to -34°C.


A non-toxic, concentrated heat transfer fluid for Air and Ground Source Heat Pumps. This product is designed to protect against corrosion, limescale and bacterial contamination, as well as frost protection from -14 to -34°C.

  • Concentrated heat transfer fluid suitable for use in Air and Ground Source Heat Pumps
  • Frost protection from -14°C to -34°C
  • Protects against corrosion, limescale and bacterial contamination
  • Non-toxic
  • Compatible with all materials commonly found in Heat Pumps
  • pH stable
  • ISO14001

Physical Properties
Composition: An aqueous solution of monopropylene glycol with specifically formulated inhibitors, stabilisers and biocides.
Odour: Characteristic
Form: Liquid
Appearance: Clear, red liquid
S.G.: 1.04
pH: 7.7

Application and Dosage Dilute before use using mains water. In order to ensure adequate corrosion and biocidal protection, the minimum “in-use” concentration of the product is 33%. Maximum “in-use” concentration is 50%. Upon dilution Fernox HP-15c will provide frost protection according to the table below. Concentration 33% 40% 50% Frost Protection -14°C -22°C -34°C Frost protection levels can be checked using a Fernox Refractometer. Existing heating systems should be cleaned of sludge and limescale deposits with a suitable Fernox Heat Pump Cleaner before adding Fernox HP-15c.

Packaging, Handling and Storage Fernox HP-15c is supplied in 20 and 25 litre drums. Fernox HP-15c is not classified as hazardous but as with all chemicals care should be taken. Keep out of reach of children. If swallowed seek medical advice and show container or label. Do not mix with other chemicals.
Safety data sheets available on request.