England and Wales: before 1900
RHI application
Sandstone or limestone, with internal insulation
Solid, insulated
Low energy lighting in all fixed outlets
Pitched, insulated
Boiler and radiators, wood logs
From main system, plus solar
wood logs
Room heaters, wood logs
Fully double glazed
double glazing installed during or after 2002
Programmer and at least two room thermostats
RHI application
Sandstone or limestone, with internal insulation
Solid, insulated
Low energy lighting in all fixed outlets
Pitched, insulated
Boiler and underfloor heating, wood logs
From main system, plus solar
wood logs
Room heaters, wood logs
Fully double glazed
double glazing installed during or after 2002
Time and temperature zone control