England and Wales: 1967-1975
marketed sale
Cavity wall, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 34% of fixed outlets
Pitched, 25 mm loft insulation
Warm air, mains gas
Gas boiler/circulator
mains gas (not community)
Room heaters, wood logs
Mostly double glazing
double glazing installed before 2002
Programmer, no room thermostat
FiT application
Average thermal transmittance 1.31 W/m-¦K
Average thermal transmittance 0.62 W/m-¦K
Low energy lighting in 75% of fixed outlets
Average thermal transmittance 0.43 W/m-¦K
Boiler and radiators, mains gas
From main system
mains gas - this is for backwards compatibility only and should not be used
Room heaters, wood logs
Fully double glazed
Programmer, room thermostat and TRVs