Hey all,

Time to access your boundless wisdom again!

We're considering options for replacing our current ch/dhw system. We
currently have a gas-fired boiler and tank with a pathetic (7.5kW)
electric shower. The tank is shoe-horned into a small cupboard at
floor level in the loft-conversion, at pretty much the same height as
the bathroom, with the header tank in what's left of the loft - maybe
2m higher. We seem to have the worst of all worlds: a *truly* pathetic
shower, a bath that takes 15 minutes to fill, a
not-desperately-efficient boiler and wasted energy from the hot-water
tank (which isn't well insulated).

I've had a bit of a look, using this site and the FAQs, at the
alternatives, and it seems to me that what we want is a combi. I need
to test the mains flow rate (seems pretty good, though), but as we
only have a single bathroom and there is not going to be any need to
run baths concurrently with showering (plus, we aren't that fussed
about slow bath-running) it seems a heatbank arrangement is overkill.
There are only two of us with no plans for expansion at the moment.
What are your thoughts?

One of our greatest concerns is the efficiency of the new arrangement
- ignoring, for the moment, the environmental impact of chucking out
all the old stuff and replacing it. With the inefficiency of our
current system, I guess we'll start saving pretty quickly...

I've checked the SEBDUK database and got the list of 50 most efficient
boilers - we'll probably select the most suitable from that list. Can
anyone give any extra insight into particularly suitable models?

Thanks again in advance for you help!

Adam...