Boiler stove connection ??

[eagleeye]

I have just upgraded my parents heating system to an unvented type and fitted new Vaillant EcoTec Plus 637. Its quite a big bungalow they are moving into so hence the large boiler. I've fitted a 210 ltr unvented cylinder it was the max height I had. In their existing house they had a Valor Stove fire which they really liked as it gave out allot of heat. They wanted me to install this in the new place which is fine so i built them a false chimney. They have now decided that as the energy bills are going up they wanted to save any way they could so i have looked into fitting a "boiler stove" instead of the standard stove fire they have. As this is the first one i have fitted I’m a bit unsure on how to connect it into the new unvented system so that both can work together. The boiler stove they are looking at is the Stovax - Stockton 11HB which gives out a nominal 7Kw to the room and 11Kw to the heating circuit.

Any help would be much appreciated

 

[ecowarm]

You can't connect a solid fuel appliance to an unvented cylinder directly, it is an uncontrolled heat source. Also the 637 is a system boiler and is also unsuitable for a solid fuel appliance.

 

[eagleeye]

Yeah thought this was the case. was hopeing there was something new out there where I would be able to do it. Bugger. I understand that I could fit a neutraliser to the system to do the hot water but as you say not to an unvented system. Really thought there may be someway to do it.

 

[ecowarm]

It is possible with a vented heat store/bank and then the unvented and heating connected to that via coils but you may not have room, and this would have to go above the stove.

 

[eagleeye]

sounds like alot of cost here. maybe forget this idea then.

 

[ecowarm]

sounds best

 

[eagleeye]

I've been looing though the net and found a company who reckon you can connect the boiler stoves to unvented systems as long as you install a heat dump system, expansion vessel and PRV. What is your opinion on this ? here is the link in case you want to have a look for yourself Stoves with Back Boiler by Future Proof Energy | Renewable Energy Experts is the part at the bottom of the page that is of intrest. Let me know what you think

 

[ecowarm]

I am not sure about what they are saying, I have seen and worked on biomass boiler on a sealed system with an overheat system that dumps mains water into boiler to cool it if anything goes wrong. I have not seen this on stoves, I would contact HEATAS to get their opinion.

 

[eagleeye]

good idea. cheers matey. im sure there is some way to do it but I want to do it the right way as not to kill anyone

 

[SimonJohns]

I'm sure you can connect an unvented to solid fuel

Seen it done on the telly too

They fitted a bigger expansion vessel
A bigger prv and heat leak

But I'm not heatas nor have I installed one before

At worst all you'll just have to convert your unvented to vented

 

[eagleeye]

yeah im sure it can be done simon. Dont want to convert to vented as its cost enough to put in as it is. most probably more simple than i think

 

[mark_mc]

aquatherm stoves can be connected to sealed systems worth a look expensive tho