Select the 'New Build House (1980)' option if your house was been built post 1980, with good insulation, loft insulation, double glazed windows & cavity walls.
Select the 'Modern House (1930-1980)' option if your house was built between 1930 - 1980, with good insulation & double glazing.
Select the 'Older House (Pre-1930)' option if your house was built pre-1930, with poor wall and loft insulation & single glazed windows.
If you are looking to heat a space which does not appear in the calculator's list of property options please call us on 01204 520544 to speak to one of our friendly infrared sales advisors. Outdoor locations, low energy houses, warehouses, churches, schools and all other spaces different to those described above may have different wattage requirements.