"Ed Sirett" wrote in message
news
Without a good look at your house no
one can say just where the new boiler
should go. The loft is perhaps the least
favourite choice as there are a number
of restrictions if doing the job proerpy
which make everywhere else
less hassle.

The loft is the best place. All you need do is board it out from hatch to
boier, a permanent light and if the boiler is near t the hatch a rail around
the hatch (wood on the rafters will do) and fit the combi high up so it
cannot be used to items on.

A properly installed 28kW plain combi sounds
like it might be OK for your needs.

I would go for the highest flowrate combi he can get. He have two showers on
the go. Alpha CD50, Baxi 133 HE Plus (can use TRVs opn 'all' rads with this
boiler, W-Bosch 40kW, highflow Glow Worms. All wall mounted.

There is not much in cost-wise to choose between
a thermal store and an unvented cylinder (of an
appropriate size), since your not diying this
aspect you can go either way.

Avoid an unvenetd cylinder as it requires an annual service charge. No
service and a flood and the insurance company will not pay up. They can
also explode.
http://www.waterheaterblast.com/
This was half the size odf a normal domestic cylinder. They can take down
the side of a house.

Stored hot water is likely to add
around £1000-£1500 versus the plain
combi option.

Yep.

A new vented cylinder would probably add
around £500.

...and the rest

The cylinder being cheaper to purchase,
but the location would best be below the loft.

A combination cylinder can be fitted in the loft.

however once you have adding in a
decent shower pump the cost
differentials start to close up between
all the forms of stored HW.

Yep. And the noisey, space consuming and prone to leaking pump.