Pay in 4 interest-free payments of $3.12 Learn more
Ships within 48 hours · Estimated delivery Nov 3 - Nov 8
Adaptive start technology: This thermostat comes with adaptive start technology that learns your home's unique heating characteristics
Compatible with Varme Programmable Thermostats for full temperature control
Available in 12 kit sizes
Compatible with other Fernox products: The Fernox F4 Leak Sealer Express 400ml is fully compatible with other Fernox products
Stylish and easy to install
Fernox F3 Cleaner 265ml Sludge & Scale Remover Varme Electric Underfloor Heating Carbon Film Kit 130w 160w Adaptive start technology: This thermostatFernox F3 Cleaner (Liquid) 265ml Fernox F3 265ml is a fast acting, pH neutral cleaner designed to clear sludge, limescale, and installation debris from central heating systems. It restores efficiency in older systems and prepares new installations in line with BS 7593: 2019 by removing flux residues and other contaminants. This smaller bottle offers the same proven performance with reduced packaging and waste. It treats an average 100 litre system,
