smokey chimneys with with caption if all 11 million homes with an open chimney fitted a chimney sheep we'd save 1% of the nation's carbon output

Insulation Industry Misses Easy Save

It is estimated that there are around 12 million homes in the UK with open chimneys, but information about their impact on household heat loss is sketchy. The Buildings Research Establishment, who are the source of all the data for SAP calculations that give us our energy performance certificates and such like, estimate that 40 …