England and Wales: before 1900
marketed sale
Solid brick, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in 11% of fixed outlets
Pitched, 100 mm loft insulation
Boiler and radiators, mains gas
From main system
mains gas (not community)
Room heaters, mains gas
Some double glazing
double glazing installed during or after 2002
Programmer, room thermostat and TRVs
RHI application
Solid brick, as built, no insulation (assumed)
Solid, insulated
Low energy lighting in all fixed outlets
Pitched, 150 mm loft insulation
Air source heat pump, underfloor, electric
From main system
electricity (not community)
Mostly double glazing
double glazing installed during or after 2002
Programmer and at least two room thermostats