Oct 27, 2025 · As the world’s first chemical water treatment company, the last six decades has seen Fernox consistently lead the way in the heating industry – from pioneering the use of …

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“Cleaning a central heating system using Fernox F3 Cleaner and protecting with Fernox F1 Protector can restore and maintain system efficiency, resulting in a gas saving of up to 15% …

Fernox Antifreeze Protector Alphi-11 is a combined glycol antifreeze and inhibitor. Offering long-term protection against frost, internal corrosion and limescale in heating and chilled water

Fernox Antifreeze Protector Alphi-11 is a combined glycol antifreeze and inhibitor. Offering long-term protection against frost, internal corrosion and limescale in heating and chilled water …

Fernox Express takes less then 30 seconds to dose the system without the need to drain down the system, saving time on-site. If dosing via a TF1 Filter, the filter should be emptied of any …

Fernox Express takes less then 30 seconds to dose the system without the need to drain down the system, saving time on-site. If dosing via a TF1 Filter, the filter should be emptied of any …

Protector F1 is compatible with all other Fernox products and is suitable for use with all materials and metals used in central heating systems, including aluminium.

Fernox Protector F1 gives long-term protection of domestic central heating systems against internal corrosion and limescale formation. It is suitable for all types of boiler, radiators and …

Physical Specification / Properties Fernox Leak Sealer F4 is a polymer emulsion. Colour: Off white Odour: Faint Form: Viscous liquid pH (conc.): 5.0 – 7.0 pH (in-use): 7.0 – 8.5 SG: 1.0 at …