Converting loft combi to an an unvented system

[conorius]

I got a WB Greenstar 35 CDI installed last year in the loft . This has been very good and trouble free. Howver I only had one shower (mira combiflow) in use at any one time.

However, we are having relatives comming to stay more and more frequently and I would like to consider renovating a second bathroom, and adding a second shower.


Is is possible to convert the WB 35 CDI combi to an unvented system, I have loads of space in the loft for the cylinder. (we have very good water supply). I recognise that once the cylinder is empty that I am back to the capacity of the boiler.

 

[Paul Barker]

Check with WB whether the combi can accept water temperatures up to 60 degrees Centigrade.

buy an Alpha Solar Smart and subject to WB approval link it up to the combi.

Or fit a cheap unvented cyilnder on s or y plan.

 

[simond]

Surely, if you link the unvented to the boiler then the flow restrictor will limit the output, whatever the incoming temperature.

The better solution would, in my opinion, be to connect UV to the boiler using an S plan setup. Just use the WB output for one outlet, eg a shower, and the UV for everything else.

 

[Agile]

By far the simplest and cheapest solution would be to fit an electric shower!

For £1000 + you could have an unvented cylinder heated by the boiler but why bother ???

Tony

 

[Paul Barker]

Surely, if you link the unvented to the boiler then the flow restrictor will limit the output, quote]

Take the bloody thing out then.