England and Wales: before 1900
marketed sale
Solid brick, as built, no insulation (assumed)
Suspended, no insulation (assumed)
Low energy lighting in 25% of fixed outlets
Pitched, no insulation (assumed)
Boiler and radiators, oil
From main system, no cylinder thermostat
oil (not community)
Room heaters, wood logs
Some double glazing
double glazing installed during or after 2002
Programmer and room thermostat
none of the above
Solid brick, with internal insulation
Suspended, insulated
Low energy lighting in 60% of fixed outlets
Pitched, insulated
Boiler and radiators, wood pellets
From main system
bulk wood pellets
Room heaters, wood pellets
Partial double glazing
double glazing installed during or after 2002
Programmer, room thermostat and TRVs