Old boiler using a lot of gas
Hi we moved into our house 3 months ago, and have an Ideal Mexico freestanding boiler wich was installed when the house was new in the early 1980's. I've just had the quarterly gas bill which has been read and is nearly £300!. We run the boiler for 2.5 hours in the morning and 4.5 hours in the evening, we have a room termostat which is set on 25 deg and all of the rads open to full (because it feels cold in here), and the boiler running on 4 out of 6. The water is obviously scalding hot but the house just doesn't feel warm, yet i'm using loads of gas. Big question should I replace the boiler, in the hope that the £300 bills will be reduced. BTW we have full double glazing and live in a 4 bed semi. Any help would be most appreciated Sar.