A non-toxic, concentrated heat transfer fluid for Air and Ground Source Heat Pumps and underfloor heating systems. This product is designed to protect against corrosion, limescale and bacterial contamination, as well as frost protection from -4 to -14°C.
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-5c 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 Cleaner before adding Fernox HP-5c.
Fernox HP-5c is supplied in 10 and 25 litre drums.
Keep out of reach of children. Do not mix with other chemicals. For further information, please consult the Safety Data Sheet (SDS).
Composition: An aqueous solution of monopropylene glycol with specifically formulated inhibitors, stabilisers and biocides.
Appearance: Blue liquid
S.G.: 1.0 pH: 7.5
Algae in feed and expansion cisterns Leathery skins or films of algae on the surface of expansion cisterns in open vented systems are caused by fungal mould growths. It occurs when the expansion cistern is not properly covered causing dust, insects and spores to be able to enter the water.
Algae in feed and expansion cisterns
Underfloor heating systems are also susceptible to microbial growth due to the lower temperatures at which these systems operate.
Gas in the system
Microbiological fermentation in a system could result in flammable gas. Methane gas, which burns with a blue flame, is most often found.Hydrogen sulphide (emitting a ‘bad egg’ smell) may also occur, and is associated with the presence of corrosive sulphate-reducing bacteria.
Bacterial or yeast infestations caused by organisms entering the system from the supply water; debris in new systems or through air contact in open expansion cisterns can also occur.
What should be done?
To combat algae in open vented systems, empty the cistern and disinfect with Fernox AF-10Biocide or Fernox LP Sterox. Refill the tank, adding the correct dose of AF-10 Biocide (refer to the instructions on the container)and top up the concentration levels of Protector F1. Ensure the tank is fitted with a purpose-made lid to prevent future contamination of the tank.
When there is gas in a system,use Fernox AF-10 Biocide to control microbiological growths and prevent gas build-up. Where contamination is significant,several repeat doses of biocide may be required: in such situations, it may be appropriate to drain and retreat the entire system.
Bacterial contamination in air and ground source heat pumps
When there is bacterial contamination in air and ground source heat pumps, Fernox HPCleaner can be used.
Before use, it should be diluted using no more than 600 litres ofmains water per one litre of HPCleaner (equivalent to 600 metres of 40mm pipework). The ground collector must be flushed out with fresh mains water before being filled with the diluted product.Having circulated the HP Cleaner for at least one hour, after whichit should be flushed out until thewater runs clear. Fill the ground collector with Fernox HP-5 /HP-5c or HP-15 / HP-15c depending on the level of frost protection required.