It is essential for your safety and that of your family to ensure that your chimneys are cleaned regularly so that soot or ash cannot build up where it can hinder or prevent the free flow of smoke and other gasses.
It is essential to have your solid fuel or wood burning appliance safety-checked annually by a registered competent person for solid fuel and wood appliances.
You increase the risk of your appliance producing Carbon Monoxide if it is badly installed or poorly maintained.
If you have a solid fuel appliance you should empty the ash pan daily, clean the flue ways at the back of the boiler weekly and clean the throat plates at the top of the room heater monthly.