England and Wales: before 1900
marketed sale
Granite or whinstone, with internal insulation
Solid, no insulation (assumed)
No low energy lighting
Pitched, insulated
No system present: electric heaters assumed
Electric immersion, standard tariff
To be used only when there is no heating/hot-water system
Single glazed
not defined
marketed sale
Granite or whinstone, with internal insulation
Solid, no insulation (assumed)
No low energy lighting
Pitched, insulated
Boiler and radiators, LPG
From main system
LPG (not community)
Single glazed
not defined
Programmer, room thermostat and TRVs