Got a quote recently for a new Worcester boiler to replace a 10 year old Potterton boiler which is 15kw. Never had any problems with the 15kw Potterton in terms of power. The installer says it's worth paying a little extra for the 18kw because it will be more efficient - something about the fact that it will run more smoothly when it steps down to a lower output than the 15kw which will switch on and off.
This is the opposite of my understanding, that the 15kw boiler is more efficient than 18kw since it burns less fuel. The minimum outputs are 5kw and 6kw respectively - I can't see that there is a lot of difference in terms of when the respective boilers will switch on and off.
Is the installer just trying to up-sell me something I don't need?
This is the opposite of my understanding, that the 15kw boiler is more efficient than 18kw since it burns less fuel. The minimum outputs are 5kw and 6kw respectively - I can't see that there is a lot of difference in terms of when the respective boilers will switch on and off.
Is the installer just trying to up-sell me something I don't need?