England and Wales: 1967-1975
none of the above
WediGÇÖu hadeiladu yn +¦l system, gydag inswleiddio allanol
Solet, dim inswleiddio (rhagdybiaeth)
Goleuadau ynni-isel mewn 30% oGÇÖr mannau gosod
Yn wastad, inswleiddio cyfyngedig (rhagdybiaeth)
Bwyler a rheiddiaduron, nwy prif gyflenwad
OGÇÖr brif system
mains gas (not community)
Dim
Gwydrau dwbl llawn
double glazing installed during or after 2002
Rhaglennydd, thermostat ystafell a TRVs
none of the above
System built, with external insulation
Solid, no insulation (assumed)
Low energy lighting in all fixed outlets
Flat, limited insulation (assumed)
Boiler and radiators, mains gas
From main system
mains gas (not community)
Fully double glazed
double glazing installed during or after 2002
Programmer, room thermostat and TRVs