England and Wales: 1900-1929
marketed sale
Sandstone or limestone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Pitched, no insulation (assumed)
Boiler and radiators, mains gas
From main system
mains gas (not community)
Room heaters, mains gas
Fully double glazed
double glazing installed before 2002
Programmer, room thermostat and TRVs
marketed sale
Average thermal transmittance 1.38 W/m-¦K
Average thermal transmittance 1.20 W/m-¦K
Low energy lighting in all fixed outlets
Average thermal transmittance 0.38 W/m-¦K
Boiler and radiators, mains gas
From main system
Gas: mains gas
Room heaters, mains gas
Multiple glazing throughout
Programmer, room thermostat and TRVs