England and Wales: 1950-1966
none of the above
Average thermal transmittance 0.31 W/m-¦K
Average thermal transmittance 0.25 W/m-¦K
Low energy lighting in all fixed outlets
Average thermal transmittance 0.15 W/m-¦K
Boiler and radiators, oil
From main system, plus solar
oil - this is for backwards compatibility only and should not be used
Room heaters, dual fuel (mineral and wood)
High performance glazing
Programmer, room thermostat and TRVs
RHI application
Cavity wall, filled cavity
Solid, insulated
Low energy lighting in 83% of fixed outlets
Pitched, 300 mm loft insulation
Boiler and radiators, oil
From main system, plus solar
oil (not community)
Room heaters, dual fuel (mineral and wood)
Fully double glazed
double glazing installed during or after 2002
Programmer and at least two room thermostats