Radiators
BTU : British Thermal Unit BTU/h : British Thermal Units per hour
RoomIdeal temperature (°C) Living room23 Dining room23 Kitchen16 Bedroom18 Bathroom24 Hall/stairs/landing17
RoomBTU/h Living roomVolume × 5 Dining roomVolume × 5 KitchenVolume × 3 BedroomVolume × 4 BathroomVolume × 5 Hall/stairs/landingVolume × 3 * volume in cubic metres
FeatureReduction in BTU/h Double glazed windows10% Cavity walls10% Foam-filled cavity walls20% Room above25% Solid floor10%
FeatureIncrease in BTU/h Two outside walls15% Three outside walls40% North-facing external wall10% French windows20% No loft insulation (directly above room) 15%
N
0.9