Please size me a HW Cylinder

[SparrowHawk99]

As some of you guys here are very knowledgeable I'm going to ask about HW, and what I need for my basement here.

View media item 68959
I have been told pressurized HW cylinder mains fed is an option here as it will feed only the basement. The rest of the house is from a combi.

So what do I buy and how easy is it to fit?

I will have someone fit the spur for it, but besides that I was going to fit the flow and return pipes (HEP) myself.

Some comments and advice welcome and where I can buy a good value cylinder etc? I have a few friends that may be able to get me trade discounts

 

[buck51]

Electric shower, 1x 5 litre under sink, 1x7 litre under sink,

 

[SparrowHawk99]

Sorry mate, what?

 

[Galoka]

Buck is suggesting not bothering with a water tank at all. Having an electric shower and two small stored water electric water heaters. This kind of thing:

http://www.screwfix.com/p/ariston-europrisma-2kw-15litre-undersink-water-heater/60922

Basically a small unvented tank fed by the mains with an electric element in. Stored hot water, not instant, so you get a decent flow not a dribble. And can be DIY installed. Unvented cylinders have to be installed by someone with the right certification.

Not a bad suggestion, though I wouldn't do it I was living there as I don't like electric showers if I can avoid them

 

[SparrowHawk99]

Ok but what feeds the two radiators?

 

[Galoka]

Well, with that small a space, electric heating is a more realistic option. It's only going to require a few Kilowatts to heat. Is there a boiler in there yet?

If you want a cylinder then how generous do you want to be. The smallest unvented cylinder you can find (probably about 80 -90 L) will probably do. Depends on what sort of shower, there is. a 10L/min shower would give you about 10mins of shower time from an 80L tank

 

[Dan Robinson]

Electric heating when there is mains gas? Are you lot nuts?


Where is the upstairs combi in relation to the basement layout?

 

[SparrowHawk99]

Combi is top left corner on the floor above

 

[Dan Robinson]

Then why not use that for hot water and get an s-plan fitted to split the heating into 2 zones?

 

[SparrowHawk99]

Can you talk me through that Dan?

I'll explain, the basement may be sub let, which is why I wasn't considering having the basement heating on the combi

 

[Dan Robinson]

Would still consider running the heating and hot water off the combi.

3 zone valves (cylinder, main house heating and basement heating) one single channel timer for hot water and 2 cm907 programmable room stats.

Then a small 90 or 120 litre unvented cylinder for the basement.

Include gas and electric in the rent (you'll probably have to include council tax anyway) and charge accordingly.

You have to be G3 qualified to install unvented cylinders.

 

[SparrowHawk99]

Thanks Dan.

Potentially silly question, if I read you correctly, ALL space and hot water from the combi? What is the cylinder then for?

 

[Dan Robinson]

Hot water cylinder is for standalone hot water (as it is being sub let).

Boiler heats it like a traditional boiler whilst still doing upstairs as it is now.

 

[SparrowHawk99]

Ah. Can you recommend a good one? It may be cheaper for me to buy and have fitted than a supply and fit price, from experience.

Secretly happy its work I can sub out as its a legal requirement

 

[Dan Robinson]

If you are going cheap, they are all much of a muchness. Just get a stainless steel one.