England and Wales: 1900-1929
none of the above
Average thermal transmittance 0.20 W/m-¦K
Average thermal transmittance 0.79 W/m-¦K
Low energy lighting in all fixed outlets
Average thermal transmittance 0.23 W/m-¦K
Boiler and radiators, mains gas
From main system
mains gas - this is for backwards compatibility only and should not be used
Fully double glazed
Programmer, room thermostat and TRVs
marketed sale
Solid brick, with internal insulation
Solid, no insulation (assumed)
Low energy lighting in 67% of fixed outlets
Pitched, 150 mm loft insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Room heaters, dual fuel (mineral and wood)
Fully double glazed
double glazing installed before 2002
Programmer, no room thermostat