England and Wales: 1900-1929
RHI application
Granite or whinstone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 95% of fixed outlets
Pitched, 100 mm loft insulation
Boiler and radiators, wood pellets
From main system
bulk wood pellets
Fully double glazed
double glazing installed before 2002
Programmer, TRVs and bypass
RHI application
Granite or whinstone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 95% of fixed outlets
Pitched, 300 mm loft insulation
Boiler and radiators, wood pellets
From main system
bulk wood pellets
Fully double glazed
double glazing installed before 2002
Programmer, TRVs and bypass