England and Wales: 1930-1949
marketed sale
Granite or whinstone, as built, no insulation (assumed)
Solid, no insulation (assumed)
Low energy lighting in 35% of fixed outlets
Pitched, no insulation (assumed)
Boiler and radiators, mains gas
From main system
mains gas (not community)
Room heaters, wood logs
Single glazed
not defined
Programmer, room thermostat and TRVs
RHI application
Granite or whinstone, with internal insulation
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Pitched, insulated
Air source heat pump, underfloor, electric, Air source heat pump, underfloor, electric
From main system
electricity (not community)
Room heaters, wood logs
High performance glazing
triple, known data
Time and temperature zone control