Fernox F3 Central Heating Cleaner Express is a heavy-duty, pH-neutral cleaner designed to remove sludge, scale, and debris from new and existing central heating systems. It is ideal for use during powerflushing to improve cleaning efficiency and restore system performance. This cleaner is quick and convenient, dosing in just 30 seconds without requiring a system drain-down. It is a neutral, universal cleaner suitable for both pre-commissioning new systems and cleaning existing ones. The formulation is pH neutral, non-hazardous, and environmentally friendly, and can be added through a radiator, towel rail, filling loop, or TF1 System Filter. It is compatible with all metals and materials, including aluminium. One 400ml canister treats up to 130 litres of system water, equivalent to 16 radiators or 250m2 of underfloor heating systems.