England and Wales: before 1900
none of the above
Average thermal transmittance 1.15 W/m-¦K
Average thermal transmittance 0.49 W/m-¦K
Low energy lighting in all fixed outlets
Average thermal transmittance 0.34 W/m-¦K
Boiler and radiators, dual fuel (mineral and wood)
From main system
electricity - this is for backwards compatibility only and should not be used
Room heaters, wood logs
Multiple glazing throughout
Time and temperature zone control
marketed sale
Granite or whinstone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Roof room(s), insulated
Boiler and radiators, dual fuel (mineral and wood), Boiler and underfloor heating, dual fuel (mineral and wood)
From main system
dual fuel - mineral + wood
Room heaters, dual fuel (mineral and wood)
Multiple glazing throughout
not defined
Programmer, room thermostat and TRVs