What Are The Differences Between Worcester System Boilers 35Cdi And 18I, Please?

[Nahameb]

I had a quote from my longstanding trusted plumbing firm for installing a 35cdi. Unfortunately the firm has just closed. One of the plumbers (also trusted) is setting up on his own and has quoted for an 18i. I just wanted an independent view of what the differences between the two boilers are, please?
Thank you!

[TheChair]

Details of the 18i can be found here: (Scroll down for technical details)
https://www.worcester-bosch.co.uk/products/boilers/directory/greenstar-i-system-9kw-to-24kw

Details of the 35CDi are here:
https://www.worcester-bosch.co.uk/products/boilers/directory/greenstar-cdi-classic-system

[Buenchico]

Looking at TC's links shows that the numerals in the model number tell you the power. i.e. the 18i has a power output of 18kW, whereas the 35cdi has a nominal power output of 35kW (although it's actually 34kW).

So you need to take the size of your house into account. (18kW should be perfectly adequate for a small or medium-sized house).

[Nahameb]

Thank you, both! I had looked at the Worcester website but was a bit boggled by the techy stuff.