I installed a Valliant Eco tec plus 38kw conventional boiler in a large 5 bedroomed house in Rookwood Park Horsham, it was installed in the utility room of the house using a horizontal flue coupled up to an unvented mega flow system. 

Here are a few words from my customer "Roger is an excellent professional tradesman, very skilled and knowledgeable, I have been using him for many years and trust him to work in my house"