Combi or indirect hot water?

[Tristar]

Hi Guys, long time no speak.

I will be putting in a new upstairs bathroom to replace the existing downstairs in my son's three bed terrace, using the 3rd bedroom, 11' x 8'4".
Plenty of room, and I would like to fit a stud across the short side, effectively making a lobby entrance to the bathroom, and use this smaller area for an airing cupboard. Unfortunately, a plumber has convinced my son that he doesn't need the airing cupboard, and should have a pressurised system fitted. Currently the house has an old combi, which I will replace with a condenser boiler. I would prefer to fit an indirect HW tank, thus providing a good heat store for a linen cupboard, and also due to the maintenance reqirement, and I would prefer not to have a fully pressurised system.

I would welcome any advice and recommendations from the cognoscenti.

Happy Christmas to everyone.

 

[wetshoes]

Why not split the difference and fit an unvented cylinder, so you get mains pressure hot and cold and also an airing cupboard.
- as long as your water supply is good enough.

regards

 

[Happyplumber]

All new boilers now have to be condensing and a stainless steel fully insulated will be alot better with longer warranty then any copper cylinder

sealed heating is alot more efficeint to run , bleed etc,cant see any great issues with maintence and sytem has less chance of corrosion build up

 

[Tristar]

All new boilers now have to be condensing and a stainless steel fully insulated will be alot better with longer warranty then any copper cylinder

sealed heating is alot more efficeint to run , bleed etc,cant see any great issues with maintence and sytem has less chance of corrosion build up

So you would suggest using a radiator to heat the cupboard, or does the pressurised system incliude a hot stainless tank?

 

[twgas]

I think you're a little confused: A pressurised system is usually the boiler/heating, whether it be a combi or heat only boiler. A "pressurised cylinder" is known as unvented.
Surely if it's your son's house it is his choice as to what is installed.

 

[Tristar]

I think you're a little confused: A pressurised system is usually the boiler/heating, whether it be a combi or heat only boiler. A "pressurised cylinder" is known as unvented.
Surely if it's your son's house it is his choice as to what is installed.

I certainly am, which is why I posted!

I understand, reasonably well, as I have plumbed two houses:
1. Vented systems
2. Unvented systems, as in my own house, CH & HW running at 1bar off a Viessmann Vitodens 200-W.

But I have not dealt with pressurised (mains hot water pressure) systems, and as I am paying for it, and doing the work, I am reluctant to fit a system which requires annual maintenance (other than the boiler).

Hence my general query as to the advantage of a fully pressurised (mains pressure) hot water system, which appears, from a neighbour's, to require far more equipment, and therefore space to fit. Please also bear in mind that this property will now become a two bed terraced house where storage space is at a premium. I accept that a hot water cylinder also takes up space, but it also serves two useful purposes, IMHO.

Therefore I would welcome hearing the arguments in favour of a 'mains pressure' system for hot and cold water, with all the attendant equipment, installation & maintenance required, as opposed to, what I had intended, a traditional unvented indirect cylinder system, the boiler for which will also supply central heating. (There is currently no make up tank for CH).

Happy Christmas to All

 

[twgas]

But I have not dealt with pressurised (mains hot water pressure) systems, and as I am paying for it, and doing the work,

An unvented cylinder should be installed only by a G3 certificated engineer.
As to the system you fit, personal requirements and available space, water etc, are the all important factors

 

[Tristar]

But I have not dealt with pressurised (mains hot water pressure) systems, and as I am paying for it, and doing the work,

An unvented cylinder should be installed only by a G3 certificated engineer.
As to the system you fit, personal requirements and available space, water etc, are the all important factors

Precisely my concern Mick, and is a good argument in favour of a traditional system.

Thanks

Chris