Changing cylinder necessary for boiler replacement?

[echoes]

Hi all,

I just got a quote for replacing my boiler with a worcester-bosch 24kW system boiler, and included in the scope of work was to remove the existing cylinder and install a new one.

The current cylinder is vented, indirect, gravity (28mm) with green foam insulation and a red jacket.

Why would changing the cylinder be necessary?

He also included a powerflush - is this necessary? Water in current system is very clean and half of the rads are new. Another guy intended to put sludge remover in for a week or 2 prior to starting instead of powerflush, but he's too busy.

Many thanks for any further advice.

 

[petit_pablo]

The system needs cleaning one way or another as part of the commissioning process. Having a New cylinder and full powerflush isnt necessary but is best practice.

 

[echoes]

Thanks petit_pablo. Appreciate the need for system cleansing.

What's the reasoning behind the new cylinder? - I can see that the coil might have limescale build-up around it (especially as there is no cyl. stat right now), and the coil and/or lagging may not be as efficient as a brand new one.

 

[petit_pablo]

New cylinders are generally better lagged and have high recovery coils so the heat up time is better and the heat loss less. Saving you money.

 

[echoes]

Thanks again - great advice.