Heat banks (again!)

You mentioned £400 not me. You make thing up. I never introduced notions. I introduced facts based on working models.

A taller heat bank that's all.

Not cheap to do this. and the boiler will cycle anyway. Better ways of doing it.

The boiler manufacturers design you mean.

What tripe. Stop making things up.

A WB Greenstar modulating boiler was introduced and priced at £725.

You then introduced the notion of an allegedly simpler and cheaper solution using a simple boiler.

You described the solution and I costed it at just over £300 of incremental components.

In order to come in at a lower cost, this gives you about £400 to spend on a simple condensing boiler.

Which model is it and from where?

Alternatively, please list out your complete working model solution with costings for each component.

.andy

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In order to achieve your solution, we are at a 300 litre minimum heatbank.

From somebody who normally makes such a huge issue about airing cupboard space as a justification for combis, this is hilarious.

Of course it is. You simply need a system boiler and a diverter valve.

When the boiler gets a signal from the DHW, it can wind up to full power for the short suration required.

During CH operation, it will modulate down to the heat requirement directly required by the radiators. A simple, efficient and effective solution.

For a corner case around the lower modulting limit of the boiler. Would you like mw to do the sums for you to show that this is a non-issue.

Not with a heatbank when a condensing boiler is the sole source of energy.

Of course. In the absence of a sophisticated external controller with full instrumentation and analogue control of the boiler, having the intelligence in the boiler is the obvious and correct place.

Go and do some reading on control systems and condensing boiler technology - none of these are complicated concepts for most people.

.andy

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A boiler with full load compensation modulating control within integral weather compensator, the sort you keep going on about is well north of £1000, more like £1,300-1,500. A £700 W-B appears super cheap in comparison. Ideals are quite cheap. Other makes are well priced if you look around. Halstead, BIASI, etc, etc. are all doing condensers and are available a decent prices, that are well south of £1,500.

Do you want my shoe size too?

If you have a cylinder taking a foot higher is no big deal. It can always go in the loft.

It isn't. When installing a heat bank you may as well take advantage of what it can offer. A simple boiler and a weather compensator transforms it, and very cheaply too.

Unfortunately you have only read about these. As you lack focus with a poor attention span the results will be skewed.

I am fully aware of that, but as you well know, it was not the question.

I know, but where is your simple boiler at £400?

Nope. Just the costings to justify your project.

.andy

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You know, I was always told that when you're in a hole, stop digging.

However.......

A 300 litre heatbank on a standard footprint will be approximately 2m high and weigh over 300kg.

This is going to require a loft with this much headroom in a place that will support this weight.

Of course you could always put the 200 litre one in the loft and the

Now what was the point about space in houses being precious?

So is this a large combined heatbank, two smaller ones or ...??

Please give model numbers and prices for the simple boiler and the weather compensator.

Oh I see.

Now who is it that meanders around adding bits as they go and being able to stick to and answer the questions on prices and models for the components for their scheme?

Did you say that you were a plumber or a heating engineer?

.andy

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