nickd wrote:
I currently have a 4 bed house with a Potterton Profile 50 powering a
Gledhill Boilermate which is about 15 year old. Having extended the
house a couple of times, when the heat is on full blast on a cold
morning, the first shower is fine but a consecutive shower runs cold.

Household is 2 adults and 2 kids, one being a pre-teenage daughter who
loves long showers :-( . We have 2 bathrooms - one bath and two high
flow showers.

I'm intending to replace the boiler with a condenser but the hot water
issue is the difficult bit. I have read the various ramblings on
unvented v heat stores and I'm still unsure as to which way to go.

The current thermal store has worked well so I'm not scared of the
heatbank option, but DPS quoted me £945 for a 180L Pandora which

inc or ex VAT? 210L square Panny is about £800 (ex VAT) with standard
100kW heat exch, standard 22mm mixing valve, no CH pumps, controls etc.
Letting them add CH or sealed system components seems to push the price
way up. Even without that clobber it's still £1K inc VAT which is
probably a lot more than the buy price of a megaflo, but practically
zero cost/hassle in the long term, unlike the unvented.