I've just bought a new house and am sorting out the multitude of problems before I move out of my rented flat. One of the problems is that I need to install a shower which I was planning to do with a simple mixer (put off a thermostatic by Part P comlications). The boiler is a Vokera Excell 80SP combi boiler which I'm led to believe should be adequate for a shower - the installation manual specs it at
11.1l/min flow rate at a 30 degree temperature rise. The central heating is working fine, but the hot water varies between boiling hot at a trickle to tepid at a decent rate.
The Baxi Combi 80e boiler in the flat I'm renting at the moment has similar specs to the Vokera and a similar water pressure coming in, but the hot water on that is fine. Anybody got any ideas why I'm not getting a better flow rate of hot water on the Vokera?