3 heating sources - possible?

gutteruu

So I had the opportunity to get a cheap external boiler that I plan to put in my shed. I have a stove with back boiler in house already but I am sick of dragging ashes/wood through the house and its a bit underpowered. I also have an oil boiler which rarely gets used but nice to have as a backup for mornings etc.

So.....I've asked a few people about installing this new boiler and they all panic. House going to blow up, 2 boilers god no etc etc. I talked to a plumber who is apparrently very technical and he seems to think its possible with a heat exchanger (heat genie?) or buffer tank but not gone on the idea.

Just thought I'd ask here and get your opinions. Am I mad? Should I get rid of stove in the house to a dry stove? Is there much involved?

Heres a diagram of existing setup. Wood boiler isn't there it was just added by me in drawing.

gutteruu

Anyone? Even a rough idea weather to go ahead with it or not?

scudo2

Multiple heat sources are not a problem.

Existing stove pipework is wrong, it should have 4 pipes, 2 "seperate" gravity to coil, 2 to the rads.

Never link vent pipes.

+ what type of wood burner are you putting in shed ? Does it need a gravity circuit?

3 coil cylinders are available special order, but heat dump has to be calculated.

Refer to your plumber in my opinion.

Again, multiple heat sources are not a problem if done safely.

gutteruu

Thanks for reply. I believe vent pipes were changed as this was an early drawing but AFAIK stove diagram is how it was plumbed. Is this a big issue?

New boiler I assume needs a gravity feed as in diagram page 15.

Is it necessary to go for a full 3 coil cylinder or could I just use existing 2 coil and maybe a buffer tank as one plumber said?

Finally, can the buffer tank just be a regular insulated copper cylinder insulated to death and would I get away with a 120 ish litre tank?

scudo2

gutteruu wrote: »

Thanks for reply. I believe vent pipes were changed as this was an early drawing but AFAIK stove diagram is how it was plumbed. Is this a big issue?

New boiler I assume needs a gravity feed as in diagram page 15.

Is it necessary to go for a full 3 coil cylinder or could I just use existing 2 coil and maybe a buffer tank as one plumber said?

Finally, can the buffer tank just be a regular insulated copper cylinder insulated to death and would I get away with a 120 ish litre tank?

Refer to on site plumber as it's hard for us to give a safe opinion over a piece of paper, believe me, no offence intended, but its way easier to evaluate the project if you can see it.
Your plumber who is installing it is also taking responsibility for it, so have a good chat with him.
If he's good it should not be a problem.

gutteruu

scudo2 wrote: »

Refer to on site plumber as it's hard for us to give a safe opinion over a piece of paper, believe me, no offence intended, but its way easier to evaluate the project if you can see it.
Your plumber who is installing it is also taking responsibility for it, so have a good chat with him.
If he's good it should not be a problem.

I can see your point. Thanks for weighing in.