England and Wales: before 1900
RHI application
Cavity wall, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 64% of fixed outlets
Pitched, 150 mm loft insulation
Boiler and radiators, wood pellets
From main system
bulk wood pellets
Room heaters, electric
Mostly double glazing
double glazing, unknown install date
Programmer, room thermostat and TRVs
RHI application
Sandstone or limestone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 86% of fixed outlets
Pitched, 200 mm loft insulation
Boiler and radiators, wood chips
From main system, no cylinder thermostat
wood chips
Fully double glazed
double glazing installed before 2002
Programmer, room thermostat and TRVs