Combi boiler

[Mollie78]

Hello, new to the forum so hope this is the correct place to post.

We have a 10 year old Vaillant system boiler and a 30 year old hot water cylinder. Boiler needs replacing and, since we don’t currently get enough hot water for our needs and could really do with the space, we are toying with getting a combi. House situation is 4 bed, one bath with shower over, but would like to future proof in case we add an en suite. Main requirement is to maintain a powerful shower (currently have a power shower which gives around 15l per minute, mains pressure tested at 20l per minite). Power shower will be replaced with a digital shower - no rainfall head of that makes a difference.

Various plumbers have recommended the following boilers - Veissmann 100w 35k, Veissmann 111w 35k storage boiler, atag ic39. We want good but not overkill. Can I ask for thoughts? I’m happy to hear ‘stick with a system boiler’ if that really is the best option!

 

[Dan Robinson]

Only one out of that selection of interest is the Atag.

I would be looking at the Intergas Xclusive 30. Or keep the boiler and upgrade the cylinder

 

[Mollie78]

Thank you, can I ask, if we replace the cylinder would you suggest sticking to a vented cylinder or swapping to unvented (if this is possible)? At the moment we have cold water tank in loft, hot water cylinder in airing cupboard, vaillant ecotec plus 360 system boiler, power shower above bath.

 

[ianmcd]

All depends on your incoming cold water supply

 

[Mollie78]

One plumber said it tested at 20l per minute (tested at outside tap). Is there other stats we should look at?

 

[ianmcd]

if you have 20L/min then with proper pipe sizing you can get what you want, some good combis on the market just now and definately a decent unvented with that flow rate would suit your needs , find a decent installer so they can see your requirements and see what they recommend