Recommend a 24kw Combi

[hard-work]

Doddy, you a one. Always joshing.

 

[John D v2.0]

I prefer to see my posts towards Hard-On, instead of an attack, more as a indicator of a total lack of respect and faith in his ability to tie his shoe laces, let alone advise people what to do in their multi million pound properties.

Some of us work on and design systems from one bedroom flats up to 200kW churches. Who's advice is worth considering here?

I had to find some insults not from him, otherwise I'd look biased!

 

[fixitflav]

You got most there. Why should anyone sane fit a space consuming, inefficient, large cylinder, with extra controls, that pumps heat into the house in summer when there is no need to? When I had a cylinder I would exhaust the cylinder of hot water after a shower. I go into my shower, and I take some time in there, and then my teenage daughter goes in after, and you know how long they take. If I a had a dumb cylinder it would need to be about 400 litres minimum, taking masses of valuable space. All I have is a white box on the back wall in a cupboard.

I live near central London where homes are expensive. You are paying for space. Why should I clutter this expensive space with unnecessary needless equipment? No one sane would.

I have advised guys renovating big flats around here, that cost millions, with renovation costing 0.5 million, to use the big ATAGs delivering about 23 litres per/min. The flexibility in not having to accommodate a large cylinder is enormous. These places tend to have walk-in showers, not baths, and at times two showers. All works well.

It's not the cylinder that's efficient or otherwise, it's the complete system. You and combi suppliers claim combi is better, others claim the opposite. I suspect it could be either way, depending on the type of use - HW drawn off in one long session, or multiple short ones, with cooling in between (as posters on this thread have said) but the difference is likely to be marginal anyway.
You refer to more controls, but the only control kit on a HW cylinder is the strap-on stat and a lead to the immersion heater if it has one. A back-up option you don't get with a combi, by the way. A combi has similar controls, but built-in, along with the pump and diverter valve. There's a case that it's preferable for these to be separate, so easier to identify and fix in the event of a problem.
Nobody has mentioned yet an additional benefit of an HW cylinder - airing space above it (yes I know it's warmed by heat leaking from the cylinder). That's a useful storage space and in its absence room would have to be found elsewhere.

 

[Dan Robinson]

Simple fact is a modern cylinder loses sod all. 58W per 24 hours in the case of my cylinder.

The big fecker we're fitting in a week or two is 102w... and that, installed the way we have designed will run two, maybe three of Hard-On's showers simultaneously, indefinitely.

My cylinder reheats from cold in 24 minutes. Should I ever let the thing cool down. With a little tweakette of my boiler settings I could probably get that down a few more minutes, but why bother?

 

[hard-work]

My cylinder reheats from cold in 24 minutes.

Doddy, that is a long time to wait for hot water to rinse a cup.

 

[hard-work]

It's not the cylinder that's efficient or otherwise, it's the complete system. You and combi suppliers claim combi is better, others claim the opposite. I suspect it could be either way, depending on the type of use - HW drawn off in one long session, or multiple short ones, with cooling in between (as posters on this thread have said) but the difference is likely to be marginal anyway.
You refer to more controls, but the only control kit on a HW cylinder is the strap-on stat and a lead to the immersion heater if it has one. A back-up option you don't get with a combi, by the way. A combi has similar controls, but built-in, along with the pump and diverter valve. There's a case that it's preferable for these to be separate, so easier to identify and fix in the event of a problem.
Nobody has mentioned yet an additional benefit of an HW cylinder - airing space above it (yes I know it's warmed by heat leaking from the cylinder). That's a useful storage space and in its absence room would have to be found elsewhere.

Look at the controls on an unvented cylinder. A number of combis only have four moving parts.

 

[Dan Robinson]

If you read further numbnuts... You'll see it is left hot permanently at a total cost of feck all. Can you work out what 58W/day of gas costs?

 

[hard-work]

Oh Doddy, You want us all to have big cylinders of hot water in our homes when we do not need to have them? You area a card! Such fun.

 

[Dan Robinson]

How much numbnuts.... try answering a question.

 

[hard-work]

Such fun.