Stoves and wood burning fireplace = thermal bridges + air leaks?

Heating, insulation, ventilation, VMC, cooling ... short thermal comfort. Insulation, wood energy, heat pumps but also electricity, gas or oil, VMC ... Help in choosing and implementation, problem solving, optimization, tips and tricks ...
Christophe
Moderator
Moderator
posts: 79120
Registration: 10/02/03, 14:06
Location: Greenhouse planet
x 10973

Stoves and wood burning fireplace = thermal bridges + air leaks?




by Christophe » 18/09/09, 09:42

A delicate problem than that of this subject: a wood stove is good but it is, in permanence:

a) a source of air leaks
b) a thermal bridge

If anyone has ideas to improve these 2 points? This is especially true for conventional stoves. The pellet stoves seem to me better on these 2 points.

For fireplaces, it is much worse and I do not even prefer to mention the problem. Only one solution apart from the condemnation: put inserts!
0 x
User avatar
Rabbit
Grand Econologue
Grand Econologue
posts: 823
Registration: 22/07/05, 23:50
x 2




by Rabbit » 18/09/09, 15:39

I don't understand where you see a thermal bridge in a wood stove.

As for air leaks, I don't see too much either.
The air being taken at ground level on the ground, it is therefore a question of
the coldest air in the house, apart from the cellar.
to preserve a certain quality of air it is necessary to renew it.
recycle to heat the house, the outside air being cooler than
that inside, by penetrating the quantity necessary for the
combustion the relative humidity of the ambient air is lowered .D or
more comfort and less need to heat.

The inserts are the worst solution. No thermal inertia, very large
air consumption to keep the tile clean, cooling
systematics of the hearth. The real return is not terrible.
To give you an idea of ​​what I think about it.
July 2 insert Bodard and G., 2 years ago winter passes I replaced
insert by a wood stove. Since we are better heated
(more uniform and controllable temperature) and we consume
half the wood. We went from 30-35 M² to
15 -20 m² max.

By the way, it's time to buy one on E bay.
not yet very expensive and the crisis helping they remain are even sometimes
almost given.
I just bought a small wood boiler in ... Germany.
An old thing for 50 €. I'll get it tomorrow. I'll hold you
aware.
Here it is in photo while waiting to have it live:
Image
There's even an oven, it's going to be handy for roasting in winter. :P
0 x
Christophe
Moderator
Moderator
posts: 79120
Registration: 10/02/03, 14:06
Location: Greenhouse planet
x 10973




by Christophe » 18/09/09, 15:43

Rabbit wrote:I don't understand where you see a thermal bridge in a wood stove.


Well, it's simple:

a) it is made of metal
b) it is permanently connected to the outside via the metal chimney also

It's worse with an insert ...

= thermal bridge!

Rabbit wrote:As for air leaks, I don't see too much either.


No stove is really 100% waterproof, even closed draft!

Well, I'm sure that a passive house would not pass the waterproofing test if it was fitted with a stove (with pellet or logs)!

Is it a boiler (hydraulic) or a stove? It looks more like a stove! In any case for 50 € it is a deal ... if it is in condition!

ps: my remark concerns a stove or a stopped chimney!
0 x
User avatar
Woodcutter
Econologue expert
Econologue expert
posts: 4731
Registration: 07/11/05, 10:45
Location: Mountain ... (Trièves)
x 2




by Woodcutter » 18/09/09, 15:57

Christophe wrote:
Rabbit wrote:I don't understand where you see a thermal bridge in a wood stove.


Well, it's simple:

a) it is made of metal
b) it is permanently connected to the outside via the metal chimney also
Tof, did you try to calculate the metal surface in contact with the outside in a smoke evacuation tube?
There is worse as a thermal bridge ...

Rabbit wrote:As for air leaks, I don't see too much either.


Christophe wrote:No stove is really 100% waterproof, even closed draft!

Well, I'm sure that a passive house would not pass the waterproofing test if it was fitted with a stove (with pellet or logs)!
It actually can cause more problems, we should find figures

But good at the same time in a passive house, we do not need a stove!
0 x
"I am a big brute, but I rarely mistaken ..."
User avatar
Obamot
Econologue expert
Econologue expert
posts: 28725
Registration: 22/08/09, 22:38
Location: regio genevesis
x 5538




by Obamot » 18/09/09, 18:08

If I'm not mistaken, for the chimney there are non-return valves (which are worth what they are worth). And to recover the heat and cut a thermal bridge, can't we install an exchanger?

Below, a heat exchanger ... water!

Image
0 x

 


  • Similar topics
    Replies
    views
    Last message

Back to "Heating, insulation, ventilation, VMC, cooling ..."

Who is online ?

Users browsing this forum : No registered users and 456 guests