England and Wales: 2003-2006
marketed sale
Average thermal transmittance 0.35 W/m-¦K
Average thermal transmittance 0.51 W/m-¦K
Low energy lighting in all fixed outlets
Average thermal transmittance 0.17 W/m-¦K
Boiler and radiators, oil
From main system
oil - this is for backwards compatibility only and should not be used
Fully double glazed
Programmer, TRVs and bypass
marketed sale
Cavity wall, as built, insulated (assumed)
Solid, insulated (assumed)
Low energy lighting in 75% of fixed outlets
Pitched, insulated (assumed)
Boiler and underfloor heating, oil
From main system
oil (not community)
Room heaters, wood logs
Fully double glazed
double glazing installed during or after 2002
Programmer, room thermostat and TRVs