my bottle ran out afrer 4 years too, when we moved here i went to the shop up near the oykun, and rather than bring it right away, they loaded onto a scooter and took us both home, fitted it, paid,38tl,it all took 5mins,just dont know if he took a number off the bottle, but that was 12 months ago and using it every day it is still going strong, also i am sat here at11-00 at night typing this without any heating, so don't worry about keeping warm John. Alan