Across the local authorities, Gwynedd had the highest proportion of households with no central heating (3.2%, 2,000), at more than two times the average for Wales.
Ar lefel awdurdod lleol, Gwynedd oedd â’r gyfran uchaf o gartrefi heb wres canolog (3.2%, 2,000), fwy na dwywaith cyfartaledd Cymru.