Which HW system is best

[b21playa]

Hi all

Currently have a system boiler (Baxi Solo 18HE) which is sited in a pantry in the kitchen, with a copper tank in the bathroom, cold water tank in loft along with F&E tank. Part of renovations & extension currently being planned, the pantry will be removed, and additions/changes to bathrooms.

At present there is 1 bathroom with an electric shower, but I will be changing this to a thermostatic shower off the hot water, with the same in 2 new en-suites. I know not everything will be used at once, but need to ensure that there is enough hot water available.

Would something like a 300Litre unvented indirect tank be suitable?

I only ask as I need to see if I need to allow space for the tank & boiler, and will need to put on the plans.

Thanks

 

[dcawkwell]

Glowworm ultrapower.

Boiler and hot tank all in one. Never run out of hot water.
All in the nice one box with a immersion backup.

Sorted.

 

[b21playa]

Glowworm ultrapower.

Boiler and hot tank all in one. Never run out of hot water.
All in the nice one box with a immersion backup.

Sorted.

Just had a quick look and it very compact, and I guess would not need someone with G3 certificate as with the tank. Wouldnt need much space, and may be able to fit it in the utility

It mentions 12.5lpm, is that really going to be enough though. My mum has a Vaillant ecotect 837 combi that does about that, and with a 2nd HW tap open, flow is reduced alot

 

[JBPHS]

Rinnai HDC1500i with a whopping 37 l/min @ 21 degC rise.

You may need a larger gas meter though.



James

 

[b21playa]

Also just noticed its a combi, will this simultaneously do the HW and CH?

I will have approx 10 normal rads, 4 towel rads, and possibly underfloor heating in the new kitchen extension.

 

[b21playa]

Rinnai HDC1500i with a whopping 37 l/min @ 21 degC rise.

You may need a larger gas meter though.



James

I already have a fairly large gas meter

 

[JBPHS]

Sorted.



James

 

[dcawkwell]

Glowworm ultrapower.

Boiler and hot tank all in one. Never run out of hot water.
All in the nice one box with a immersion backup.

Sorted.

Just had a quick look and it very compact, and I guess would not need someone with G3 certificate as with the tank. Wouldnt need much space, and may be able to fit it in the utility

It mentions 12.5lpm, is that really going to be enough though. My mum has a Vaillant ecotect 837 combi that does about that, and with a 2nd HW tap open, flow is reduced alot

No you must be reading the wrong manual.
It wll give flow rates equivalent to an unvented cylinder.

 

[b21playa]

Glowworm ultrapower.

Boiler and hot tank all in one. Never run out of hot water.
All in the nice one box with a immersion backup.

Sorted.

Just had a quick look and it very compact, and I guess would not need someone with G3 certificate as with the tank. Wouldnt need much space, and may be able to fit it in the utility

It mentions 12.5lpm, is that really going to be enough though. My mum has a Vaillant ecotect 837 combi that does about that, and with a 2nd HW tap open, flow is reduced alot

No you must be reading the wrong manual.
It wll give flow rates equivalent to an unvented cylinder.

Just read official manual which is saying 25l @35 degC rise

It does look good, and wondering if it can be fitted in a 600mm kitchen cupboard, so I can integrate it into the utility kitchen, without having a separate cupboard for it.

Another £2k spent, was hoping initially of just buying a tank, and using existing boiler.

Just hoping now that the existing water main is sufficient

 

[b21playa]

Just found installer would need G3 ticket for the glow worm and not all good reviews about them either.

May end up an unvented cylinder at just over £1k, which means I can hopefully use existing boiler as its about 4yrs old, and replace it when it gives up. Link below

http://www.mrcentralheating.co.uk/pre-plumbed-300-litre-indirect-s-s-unvented-cylinder

Think I'll get the architect to plan for a room in the utility area to house the boiler and cylinder as well as a laundry area.

I'll get an installer around when Im closer to fitting, but I think I may need to factor in a new mains, as I think it could be old lead pipework