Wood Burner with back boiler

[martin4036]

Can anyone give me some advice.

I live in Spain and have a combination boiler for central heating only, and solar panels for hot water.
The CH boiler runs on Propane gas bottles and is very efficient but also expensive.
I have a log burner which is not very efficient but wood is cheap.
I am thinking of having a wood burner with back boiler installed and use this as well as, or instead of the gas boiler.
I am not planning to have any of this linked in to the hot water system.
The wood burner I am looking at is a Bronpi hydrobronpi 80.
I have 7 radiators 5 downstairs 1 upstairs and 1 on a mid landing.
Any comments will be gladly appreciated

 

[ecowarm]

Looks like a good boiler see here Google Translate
The regs are different in Spain and I can't comment on the installation.

 

[mark_mc]

sounds like an install for a back boiler would be well suited.
see if it was me. I would install and tell no-one as long as it is install correctly.

 

[Simon F]

you could post the thread on 'looking for a plumber' - offer a free holiday and be swamped with interest !!
on a serious note, would it not be useful to have the hot water also supplied from the log burner, especially for the winter months ( or is that Days in Spain )

 

[WHPES]

Thermal store would be my suggestion.

 

[martin4036]

Thanks for all the comments.
With reference to hot water (Simon F) Bit difficult due to position ofexisting solar hot water cylinder.
Just need to get the central heating sorted out.
Am I right in thinking that the CH will have to be changed from a pressurised system to a conventional gravity fed one with a metal header tank. Not sure about the spanish regs as I dont speak the language that well. I just want a rough idea so that I can be confident that it is installed properly.
Many thanks

 

[dancinplumba]

you could post the thread on 'looking for a plumber' - offer a free holiday and be swamped with interest !!
on a serious note, would it not be useful to have the hot water also supplied from the log burner, especially for the winter months ( or is that Days in Spain )

the best advice given imo

 

[mark_mc]

yes the heating will have to gravity (open vented) for the back boiler. what cylinder do you have?
yes and it is good practice to install a metal f+e tank with a back boiler also.
i would just have the back boiler doing rads and not the hot water you will have plenty of that? with being in spain. i would have the back boiler with a large heat leak rad on the second floor as a gravity circuit (safe circuit) and then stat on the gravity circuit and a pump and that will pump to the other rads.
unless you want the back boiler heating the cylinder and that may mean changing the postion and type of the cylinder.

 

[WilliamLaurence]

I bought one of these heat exchangers from ChimneyHeaters.com and it is Stainless Steel. The rest of the pipes in my house are Copper and some plastic. I get a tremendous amount of heat from this thing and I am worried that it will melt the copper or plastic tubing.

The heat coming out of the Chimney Heater is about 190f does anyone know if this is to hot for the copper or Plastic pipes in my House?

 

[AWheating]

I bought one of these heat exchangers from ChimneyHeaters.com and it is Stainless Steel. The rest of the pipes in my house are Copper and some plastic. I get a tremendous amount of heat from this thing and I am worried that it will melt the copper or plastic tubing.

The heat coming out of the Chimney Heater is about 190f does anyone know if this is to hot for the copper or Plastic pipes in my House?

you would want to use copper at that temp, especially if it overheated above the normal working temp.

 

[peteheat]

I bought one of these heat exchangers from ChimneyHeaters.com and it is Stainless Steel. The rest of the pipes in my house are Copper and some plastic. I get a tremendous amount of heat from this thing and I am worried that it will melt the copper or plastic tubing.

The heat coming out of the Chimney Heater is about 190f does anyone know if this is to hot for the copper or Plastic pipes in my House?

Having looked at the web site I suggest the post is either edited or removed, I have never seen such Dangerous Practices encouraged by any manufacturer, the content also proves they know nothing about heating with solid fuel, how many of you use 2 bar PRV's?

The coil is nothing new I remember them from back in the early 1980's they didn't work then and I have no reason to believe they will work today.

If used with a properly installed stove there is not sufficient heat in the P.O.C. to heat the water and allow the P.O.C. rise to atmosphere resulting in creosote build up.

To the O.P. I suggest that you look for a different brand of stove, after sales service from Bronpi is nothing short of terrible, also their output figures are not to be trusted, they have one model in the U.K. sold as 5 Kw output, the same model is sold in Spain, France and Ireland rated at 8 Kw.

On the plumbing ensure you go open vent it has nothing to do with regulations just honest safety, also with the information provided you could look at using a plate heat exchanger for the solar and using the coil in the cylinder for your stove, (depending on the tappings available).

AW

I reckon he shouldn't have too much of a problem after a while because the coil will get covered in clinker preventing it from absorbing any heat of consequence.