Marky Mark recommends as above - guess what was fitted in my house..... dont be offenced by his lack of reply he's a very busy bunny.

He advised and then I had fitted a Vailliant- I have an ECOTEC Plus 831 - the controls are basic and easy to use. Turn the boost up or turn the boost down sort of thing.
Very quiet
Works well

Mr Central Heating is your best bet too for purchase- just in Tamworth

http://www.mrcentralheating.com/index.html

Excellent service and delivery - could not fault them at all.


When looking at the specs of a boiler if you're using it for a shower you need to consider the hot water flow rate - the guys at work advised a minimum hot water delivery of 10L p/min mine does 12.7, conversly it means it is over specced for the house in terms of heating capacity.

HTH

HTH