Advance combi user & installation manual dec 2017.pdf. A well-maintained high quality boiler can last from 50 - 75 years however, if a boiler is more than 25 years old, it may not have energy saving and safety devices found on newer models with modern energy saving devices, a home owner can enjoy a 25 - 40% savings on energy usage and enjoy more comfort. We are constantly working on our distribution network. With all of this in mind, a system upgrade could take anything.
Added: 2020-05-07 | Category: one