Based on approximation and does not imply any warranty or guarantee of energy consumption and/or electricity costs. Assumes the system is installed as a primary heat source in a well insulated dwelling built to current Part L regulations, with a 10mm floor type on 10mm insulation board, an intelligent programmable thermostat with floor sensor and a floor temperature of 24 degrees Celsius. Electricity prices are Ofgem price cap unit rates for 1 October to 31 December 2026 from The Energy Shop and exclude standing charges and any government support.