England and Wales: 1983-1990
RHI application
Cavity wall, filled cavity
Solid, no insulation (assumed)
Low energy lighting in 90% of fixed outlets
Pitched, 200 mm loft insulation
Boiler and radiators, oil
From main system
oil (not community)
Room heaters, coal
Fully double glazed
double glazing installed before 2002
Programmer, TRVs and bypass
RHI application
Cavity wall, filled cavity
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Pitched, 200 mm loft insulation
Ground source heat pump, radiators, electric
From main system
electricity (not community)
Room heaters, coal
Fully double glazed
double glazing installed during or after 2002
Time and temperature zone control