Installing a new boiler can reduce your energy bills. A newer, more efficient model may use less fuel to produce the same heat, which could lead to savings on your energy bills. However, the extent to which a new boiler will reduce your bills will depend on various factors, such as the size and efficiency of the new boiler, the size and age of your home, and your current heating system. Doing a little research by yourself would help you gain a professional evaluation before deciding whether to install a new boiler.