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Non-foaming formula for safe and efficient use
Supports cleaner air — great for allergy-sensitive spaces
making it easy to reposition the thermostat as required
Ideal when you only want to control the floor surface temperature
Fernox F3 Express 400ml | Fast-Dose Heating System Cleaner Varme Electric Underfloor Heating Carbon Film Kit 130w 160w Non-foaming formula for safe andFernox F3 Express (Aerosol) 400ml Fernox F3 Express is a pH neutral, non foaming cleaner designed to remove sludge, scale, and debris from central heating systems. It helps restore efficiency, reduce boiler noise, and prepare new systems by clearing out flux and installation residues. The Express canister uses Barrier Pressure Pack technology, which keeps the propellant separate from the active product, preventing air from entering the system and
