England and Wales: before 1900
RHI application
Sandstone or limestone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 93% of fixed outlets
Pitched, 200 mm loft insulation
Boiler and radiators, bottled LPG
From main system
bottled LPG
Room heaters, wood logs
Fully double glazed
double glazing installed before 2002
Programmer, room thermostat and TRVs
RHI application
Sandstone or limestone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 93% of fixed outlets
Pitched, 300 mm loft insulation
Air source heat pump, radiators, electric
From main system
electricity (not community)
Room heaters, wood logs
Fully double glazed
double glazing installed before 2002
Programmer, TRVs and bypass