England and Wales: before 1900
RHI application
Granite or whinstone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 14% of fixed outlets
Pitched, 100 mm loft insulation
Electric storage heaters
Electric immersion, off-peak
electricity (not community)
Room heaters, dual fuel (mineral and wood)
Partial secondary glazing
secondary glazing
Manual charge control
RHI application
Granite or whinstone, as built, no insulation (assumed)
To unheated space, insulated
Low energy lighting in all fixed outlets
Pitched, 350 mm loft insulation
Boiler and radiators, wood pellets
From main system
bulk wood pellets
Room heaters, dual fuel (mineral and wood)
Partial secondary glazing
secondary glazing
Time and temperature zone control