ᐅ Fireplace with direct exhaust venting through a flue pipe
Created on: 11 Jul 2016 09:21
D
DragonyxXL
Is it possible to install a wood stove and run the black exhaust pipe directly through the ceiling and roof to the outside, thus avoiding the need to build an additional chimney? Sometimes you see such setups online, but is this also feasible in Germany?
Sir_Kermit11 Jul 2016 10:37Hello,
Whatever you do: try to involve the chimney sweep beforehand, they appreciate that.
About 15 years ago, we had to route our condensing boiler’s flue pipe concentrically to the outside. At that time, the pipe was not allowed to pass through living areas but could go through knee walls, and we were permitted to install two elbows. According to online sources, it seems it might be allowed now to route it through living spaces, but you definitely need the certified expert’s approval. Whether this still applies in modern houses is another question. Without precise advice, this can become quite a balancing act.
One of our neighbors retrofitted a wood stove with a flue pipe since there was no chimney. The pipe goes directly through the exterior wall, turns 90 degrees once upward, and runs past the roof eave to the top. The required height is another matter; if I recall correctly, our chimney needed to extend 1 meter (3 feet) above the ridge back then, which was later amended a few times.
Kermit
nasenmann schrieb:
No idea if a chimney sweep in Germany would approve that. But I imagine it could be tricky if you have to run it through an upper floor.
Whatever you do: try to involve the chimney sweep beforehand, they appreciate that.
About 15 years ago, we had to route our condensing boiler’s flue pipe concentrically to the outside. At that time, the pipe was not allowed to pass through living areas but could go through knee walls, and we were permitted to install two elbows. According to online sources, it seems it might be allowed now to route it through living spaces, but you definitely need the certified expert’s approval. Whether this still applies in modern houses is another question. Without precise advice, this can become quite a balancing act.
One of our neighbors retrofitted a wood stove with a flue pipe since there was no chimney. The pipe goes directly through the exterior wall, turns 90 degrees once upward, and runs past the roof eave to the top. The required height is another matter; if I recall correctly, our chimney needed to extend 1 meter (3 feet) above the ridge back then, which was later amended a few times.
Kermit
D
DragonyxXL11 Jul 2016 11:44Thank you for the helpful tips. In our bungalow, the flue pipe would not pass through any additional living spaces. Through a Google search and an image found there, I came across an interesting document.
Information Sheet No. 47 – Assessment Aid for the Inspection of Heating Systems – Chimneys Installed on Heating Appliances without a Base
It also states: "A base is not required for
a) flue systems for heating appliances used only temporarily with a nominal heat output of no more than 10 kW in detached, single-story buildings intended only for temporary occupancy, such as weekend houses, shelters, construction site cabins, and accommodation at building sites..."
The information sheet also highlights many other issues. Either the stove must support the static load of the chimney or the ceiling must do so. Preventing rainwater infiltration is more important, as otherwise water would go straight into the stove. If the stove is ever replaced, it must be checked whether the flue pipe can still be used.
Aside from all the hurdles to overcome, the solution does not seem feasible for permanently occupied buildings or rooms.
Information Sheet No. 47 – Assessment Aid for the Inspection of Heating Systems – Chimneys Installed on Heating Appliances without a Base
It also states: "A base is not required for
a) flue systems for heating appliances used only temporarily with a nominal heat output of no more than 10 kW in detached, single-story buildings intended only for temporary occupancy, such as weekend houses, shelters, construction site cabins, and accommodation at building sites..."
The information sheet also highlights many other issues. Either the stove must support the static load of the chimney or the ceiling must do so. Preventing rainwater infiltration is more important, as otherwise water would go straight into the stove. If the stove is ever replaced, it must be checked whether the flue pipe can still be used.
Aside from all the hurdles to overcome, the solution does not seem feasible for permanently occupied buildings or rooms.
K
Komposthaufen11 Jul 2016 13:18We are planning a freestanding stove with a pipe that goes vertically upward through the ceiling into a chimney passing through the first and attic floors. During an initial inspection, the chimney sweep did not identify any insurmountable issues. He will build the lightweight chimney (Promat or similar) himself, which will be installed on the first floor, hopefully making the final approval process easier.
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