query

[smitty]

is there a pressurised cylinder out there that has a twin coil ,but also take a multi fuel stove ,anyone ever fit one like this?

 

[so-solar]

you mean a triple coil cylinder? But i am pretty sure you cannot fit an uncontrollable heat source to a pressurised system!

 

[smitty]

you mean a triple coil cylinder? But i am pretty sure you cannot fit an uncontrollable heat source to a pressurised system!

thats what i thought but the customer is adamant it can be done with a certain cylinder he has seen ,the heating side is fed off a f and e tank where the domestic side is pressurised stainless steel cylider

 

[so-solar]

would like to know what it is called as i will fit 1 at my house!!!!!!!

 

[Renewable M]

That, my friend is a thermal store.

Open vented, so as so-solar quite rightly said you can connect the uncontrolled heat source, but there is a domestic hot water heat exchanger, so you get mains pressure hot water. So the heat sources are direct, and the hot water is produced by passing mains cold through a finned copper coil. Ace. Simple.

Much more sense than an unvented cylinder, no G3 malarkey, no special qualifications. They fit these as first choice on most of continental europe because they are efficient, inherently safe and cost effective. As usual we are behind the times....but dont get me started on that.....

The heating is fed direct from the body of water, the boiler as the last most expensive heat source coming on last.

If you need any help, let me know, I design loads of these for our installers. in fact, here is an example much like yours, just scroll down the page to the case study : thermal store with boiler, wood burner, solar...

Hope this helps. (bloody customers eh! Why cant they keep of t'internet.)

 

[Bernie2]

Yes these plate heat exchangers can work virtually by themselves, they don't need a combi.

You can make your own instant hot water by putting a flow and return in one side and a cold mains in, dhw out in the other.

So you could have a conventional system boiler and just loop one in to the c/h circuit, to get hot water.
I suppose they act more like calorifier's than heat exchangers in the way we think of them.

All the old GlowWorm combis where, were virtually just a 3 port valve and a heat exchanger.