Recommendation for replacement Nat Gas Boiler?

BigGeorge

Have a vey high efficiency system 12kw nat gas boiler but it is proving hard to get it serviced as most people don't car spare parts. Its 11 years old.

Looking to replace with something more reliable, have been recommended a Worchester Bosch Greenstar i18 system NG boiler. Any recommendations for higher efficiency unit which is widely serviceable?

10-10-20

A friend in the business said that if he was installing anything in his own home it would be a Viessmann Vitodens 100 or 200.

https://www.viessmann.co.uk/products/gas-boilers/gas-condensing-boilers/vitodens/vitodens-100-w

He does not sell boilers or have business interests in the company. Beyond that recommendation I can tell you no more.

John.G

I think the Vitodens 200 can modulate down to something like 1.9kw.

BigGeorge

Thanks for advice - set up of the boiler that is runs for a few hours per day heating a large hot water tank, so its s system boiler rather than a combo