England and Wales: before 1900
marketed sale
Sandstone or limestone, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in all fixed outlets
Pitched, 300 mm loft insulation
Boiler and radiators, wood pellets
From main system, plus solar
bulk wood pellets
Room heaters, wood logs
Fully double glazed
double glazing installed during or after 2002
Programmer, room thermostat and TRVs
RHI application
Sandstone or limestone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 83% of fixed outlets
Pitched, 250 mm loft insulation
Boiler and radiators, wood pellets
From main system, plus solar, no cylinder thermostat
bulk wood pellets
Room heaters, wood logs
Mostly double glazing
double glazing installed during or after 2002
Programmer, room thermostat and TRVs