England and Wales: before 1900
marketed sale
Sandstone or limestone, as built, no insulation (assumed)
To unheated space, no insulation (assumed)
Low energy lighting in 88% of fixed outlets
Pitched, 250 mm loft insulation
Electric storage heaters
Electric immersion, off-peak, plus solar
electricity (not community)
Room heaters, dual fuel (mineral and wood)
Fully double glazed
double glazing installed before 2002
Manual charge control
RHI application
Sandstone or limestone, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in 92% of fixed outlets
Pitched, 350 mm loft insulation
Air source heat pump, radiators, electric
From main system
electricity (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer and room thermostat