Would having microbore pipe for the central heating have any effect on how hot the house will get? Reason is a family members house is out in the country and only has a coal fire for the heating, no mains gas or tank of oil/gas. The rads do seem to be hot to the touch and water is fine but the house is always cold. Could it just be a insulation problem within the cavity( if it has one) and a lack of loft insulation?
