Advanced Zoning Ability Leads To Efficiency Gains
Electric underfloor heating tends to be controlled on a room-by-room basis (rather than one central thermostat for central heating). This creates the ideal situation for floor heating efficiency. Warmup thermostats can be programmed to only heat rooms when it is required. This leads to large efficiency gains as energy isn't wasted heating rooms that don't require heating at that time. This also leads to a higher comfort level as rooms which require less heating can have their own heat setting which means they won't be overheated or underheated.
The difference in running costs between typical heating systems such as radiators and underfloor heating systems will vary according to the thermal characteristics of your individual house, the age and efficiency of your boiler or traditional heating system, your usage pattern, the control systems implemented and your particular gas and electricity tariff. The many variables make it impossible to provide a reliable rule of thumb. As a general principle with Warmup a 10-15% energy saving should be possible using insulated underfloor heating when compared to conventional electric heating.