What are the disadvantages of a Boilermate Thermal Store?

[Macaque321]

I'm renovating my house which has a standard Vaillant boiler and tank in the cellar, and a tank in the loft. The house will have 2 bathrooms, and is a largish Victorian house (3 floor, but bathrooms are on half landings, at 1.5 and 2.5). Will have UFH on ground floor

I've had the lead main replaced and get good water pressure.

All the plumbers I've spoken to have suggest installing an unvented cylinder system, or combi, but this will involve a pump for the discharge if I want to put it in the cellar.

Is there any reason not to buy a modern Gledhill Boilermate? This wouldn't require a pump, or annual servicing and could potentially be topped up via solar one day. And they are quite cheap at £1000ish.

Noone has given me specific reasons what's wrong with a Thermal Store here, but everyone says not to. What are the problems with one?

 

[king of pipes]

I'm not that convinced Gledhill are that great at QC had issue with their products on several occasions, the main problem with a thermal store is it's always hot 65 - 70° c so a location where it's not going to cause a overheating issues is best , summer months are worse you say you will use solar to heat the store ? In the summer months this may work but may need boosting by the boiler on larger hot water demand . I'm in agreement with the engineers you've spoken to a boiler and unvented cylinder coupled with solar or PV and weather compensation would be a better option have a look at Viessmann product's kop

 

[SimonG]

Over heating a thermal store is a waste of money, unless you are trying to tie in uncontrolled heat sources.

Unvented cylinder and a system boiler, if you need a pump so ge it.