Most oil combi boilers have an internal hot water store to supply your hot water, rather than heating it on-demand like gas combi boilers do. The government plans to phase-out high-carbon fossil fuel ...

try to switch to slightly cheaper No. 2 fuel at a minimum. And ask your oil provider if you can use a plant-based biofuel, or a mix of biofuel and oil, in your existing boiler or furnace with ...