The table below shows how much you can expect to pay in annual running costs for a gas boiler with different levels of efficiency. The costs in the table are estimated averages and there will always be wide variations in individual properties due to local climate, heating controls, levels of insulation, exposure of the house and occupancy patterns.
As you can see the annual savings from using the most efficient condensing boilers over older models can be quite substantial.
| Typical Annual Fuel Costs | ||||||
| Seasonal Efficiency | Flat | Bungalow | Terraced House | Semi-Detatched | Detatched | |
| Old Boiler (1970's model) | 56% | |||||
| Old Boiler (1980's model) | 67% | |||||
| Old Boiler (early 90's model) | 72% | |||||
| Old Boiler (late 90's model) | 74% | |||||
| New Boiler | 91% |
The above estimated costs are based on prices from the
British Gas standard tariff (monthly direct debit) on xxx date
