Hot water flow rate

jcsteve · 28 Mar 2006

Suggestions please...currently in a 2 bedroom ground floor flat with 6 rads and hot water for kitchen and bathroom coming from Vaillant Turbomax 28 combi boiler. All works fine.....good flow rate in the shower. Cold supply is from the main and there's more than enough pressure.

Soon to be 4 bedroom ground floor and basement flat and will be adding underfloor heating, second bathroom, and utility room. I'm confident that the boiler has plenty of capacity for the UFH, but am concerned that the extra bathroom/utility will mean that the hot water flow rate suffers.

Should I consider fitting a hot water tank and if so what sort? Would it be better to keep the combi supply for the shower and use the tank for the bath etc?

kevplumb · 28 Mar 2006

Vaillant Turbomax 28 combi boiler

go look at the badge again

jcsteve · 28 Mar 2006

kevplumb said:
Vaillant Turbomax 28 combi boiler

Click to expand...

go look at the badge again

All right I'll be a bit more specific......Turbomax plus 828E flow rate is around 11.5 litres/min

Didn't think it made that much difference to the question! It's around 3 years old.

jim

bogstandard · 28 Mar 2006

Sorry but you can't add a hot water tank to a combi boiler -like as what you as! Yours is an instantanious water heater - boiler comes on when you turns the water tap
You as a nice boiler there!

kevplumb · 28 Mar 2006

yes you can you just pipe it as an s plan

.Turbomax plus 828E flow rate is around 11.5 litres/min

Didn't think it made that much difference

correct but it always helps to know the boiler

jcsteve · 28 Mar 2006

kevplumb said:
yes you can you just pipe it as an s plan

Can you elaborate.......s plan? assume you mean run the heating flow/return through the tank? What sort of tank?

chrishutt · 28 Mar 2006

What sort of tank?

An unvented cylinder would be nice, but a bit pricey and it would need a good flow rate from your mains supply (typically with a ¾" supply pipe). Look at brands like Megaflo, Oso and Ariston (cheaper end).

kevplumb · 28 Mar 2006

jcsteve said:
kevplumb said:

yes you can you just pipe it as an s plan

Can you elaborate.......s plan? assume you mean run the heating flow/return through the tank? What sort of tank?

Click to expand...

no you just put the cylinder on its own zone

any cylinder you like as long as 1 you have the room

2 you can get the head (dont even think about it )

diynot

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Hot water flow rate

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