• Central Heating Inhibitor: Fernox F1 Express 400 ml helps protect domestic heating systems against internal corrosion and limescale in boilers, radiators and pipework
• Fast Express Dosing: Aerosol format doses in around 30 seconds through a radiator, filling loop or Fernox TF1 filter, helping reduce maintenance time on site
• Fernox F1 Inhibitor Coverage: One 400 ml can treats up to 130 L of system water, equal to around 16 radiators or 250 m2 of underfloor heating
• Inhibitor For Central Heating: Suitable for mixed metal systems and common heating materials including aluminium when used as directed at the correct concentration
• Radiator Inhibitor Fluid: Helps maintain efficient water treatment after cleaning, servicing, radiator replacement or routine annual inhibitor level checks
• Trusted Fernox F1 Protection: Designed for regular heating system maintenance to help protect boilers, radiators and pipework from corrosion related build up

Fernox Central Heating Protector F1 Express 400 ml is a fast application central heating inhibitor designed to help protect domestic heating systems against corrosion and limescale. Suitable for routine system protection after installation, servicing, flushing or draining, this aerosol format makes dosing simple without the need for a separate dosing vessel. The 400 ml can treats up to 130 litres, which is typically equal to 16 radiators or 250 m2 of underfloor heating, making it a practical choice for standard home heating systems.

This Fernox F1 inhibitor helps maintain system efficiency by reducing the risk of internal corrosion and scale build up within radiators, pipework, boilers and underfloor heating circuits. By helping to protect mixed metal systems, including those containing aluminium components, it supports long term heating performance and helps reduce the likelihood of cold spots, poor circulation and boiler noise caused by sludge or debris formation.

The express canister is designed for quick dosing in around 30 seconds and can be applied through a radiator, filling loop or suitable system filter. The label indicates a working pH range of 6.5 to 8.5, making it suitable for use as part of normal central heating water treatment and maintenance. Its compact 400 ml format is convenient for installers, heating engineers and homeowners who need a simple inhibitor for central heating systems.

Fernox Central Heating Protector F1 Express is ideal when replacing inhibitor after draining or cleaning a heating system, topping up protection during annual servicing, or treating a system after adding new radiators or components. It is a trusted radiator inhibitor fluid for helping protect against corrosion and limescale while keeping the system water properly treated.