England and Wales: before 1900
RHI application
Sandstone or limestone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 53% of fixed outlets
Roof room(s), ceiling insulated
Boiler and radiators, oil
From main system
oil (not community)
Room heaters, wood logs
Some double glazing
double glazing installed during or after 2002
Programmer, TRVs and bypass
RHI application
Sandstone or limestone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 80% of fixed outlets
Roof room(s), insulated
Air source heat pump, radiators, electric
From main system
electricity (not community)
Room heaters, wood logs
Partial double glazing
double glazing installed during or after 2002
Programmer, TRVs and bypass