England and Wales: before 1900
RHI application
Solid brick, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Thatched, with additional insulation
Boiler and radiators, wood pellets
From main system
bulk wood pellets
Room heaters, wood logs
Mostly double glazing
double glazing installed during or after 2002
Time and temperature zone control
RHI application
Solid brick, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Thatched, with additional insulation
Boiler and radiators, wood pellets
From main system
bulk wood pellets
Room heaters, wood logs
Mostly double glazing
double glazing installed during or after 2002
Programmer, room thermostat and TRVs