England and Wales: before 1900
marketed sale
Solid brick, as built, no insulation (assumed)
Suspended, no insulation (assumed)
No low energy lighting
Flat, no insulation (assumed)
Boiler and radiators, mains gas
From main system
mains gas (not community)
Some secondary glazing
secondary glazing
Programmer, TRVs and bypass
rental
Solid brick, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in all fixed outlets
Flat, no insulation (assumed)
Boiler and radiators, mains gas
From main system
mains gas (not community)
Partial secondary glazing
secondary glazing
Programmer, room thermostat and TRVs