ᐅ What should you do if the wrong chimney has been installed?
Created on: 13 Oct 2021 22:08
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Heidi1965
For our new build, the architect planned for a chimney because we wanted a wood-burning stove in the hallway. It was clear from the start that it would be a room-sealed stove and that the chimney needed an air supply. The bricklayer took care of that. The stove installer connected the room-sealed stove. During the first test run today, it was found that the stove isn’t burning properly because it’s not getting enough oxygen. It only burned well when a) the flap was open or b) the duct on the opposite wall was open. The stove installer tried shining a light up the chimney from the bottom through the duct and noticed that the flue pipe almost completely fills the chimney, leaving barely any room for air supply. He suspects the wrong type of chimney was installed. Bingo! So, we immediately called the main contractor, who did the brickwork (around 7 PM today). He wants to check his paperwork tomorrow to see what kind of chimney the building materials supplier actually charged him for... The stove installer also knew of a case where the bricklayers used so much mortar when building the chimney that there was no room left for air supply from above. That required a very complicated fix, poking around on the roof to clear it again. Anyway, it’s a big mess! I’m afraid we might now have to take the stove’s air supply from the living areas, which is obviously problematic in a newly built, fully insulated house.
Does anyone have any experience with this?
Does anyone have any experience with this?
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Heidi196514 Oct 2021 15:05In der Ruine schrieb:
If the chimney sweep gave his approval, you shouldn’t need to open any vents or place a plant in front of them.
If the stove doesn’t get enough air, the flue can’t draft properly either.
So many things can go wrong. Several people have died because they underestimated the risks.
Remember, we’re talking about fire inside the house. When the chimney sweep arrived, the stove wasn’t even on. He looked inside the vents with a flashlight and found everything fine. Is a standard stove – that is, a room air-dependent stove – forbidden in a new build? During yesterday’s test run, the flue only drafted properly when a) the stove door was slightly open, or b) the air vent in the living room was open. When both were closed, the fire barely developed and everything filled with smoke. So the chimney wasn’t drafting.
Heidi1965 schrieb:
Is a standard stove – meaning one that depends on room air – prohibited in a newly built house?No, of course not.
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Heidi196514 Oct 2021 15:24Nemesis schrieb:
lus words and characters... I don’t understand the last line now.
Heidi1965 schrieb:
I don’t understand the last line now.You have to type at least 5 words and 30 characters here, unfortunately mandatory. Annoying. 😉
In der Ruine14 Oct 2021 19:19Heidi1965 schrieb:
Is a standard stove—that is, a room air-dependent stove—forbidden in a newly built house?No. But have you considered why you don’t have one or why it wasn’t planned?Heidi1965 schrieb:
When both were closed, the fire barely developed, and everything smoked. So the chimney didn’t draw.Ahh, the answer seems to be here. Gases flow through a stove. It draws in oxygen or air for combustion and releases exhaust gases. For this to work, the flow of gases must be ensured.
The driving force is the flue. By “pulling” the exhaust gases upward and outside, a negative pressure is created that allows the stove to draw in air. This is supposed to happen entirely through your chimney because your house is apparently so airtight. If there is no fresh air supply, the stove has to draw air from somewhere else—like a ventilation flap or the stove door. This might work as a makeshift solution, but it can become dangerous if the flap or stove door is accidentally closed or if enough oxygen cannot flow into the house. In the worst case, smoke gases can enter the building, causing unpleasant odors and health hazards, or even worse, carbon monoxide can accumulate, and no one will wake up.
Please talk to your chimney sweep about this.
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hampshire14 Oct 2021 19:29The stove has been inspected and works properly with the fresh air intake flap open. That sounds promising. Apparently, you did not receive a room-air-independent stove, so conversion measures and suggestions (such as a ventilated system) are unnecessary. Like in your case, this is also how it is arranged in our "children’s apartments" – fresh air comes from the room. The chimney specialist confirmed that the room volume matches the stove size and the approval is valid. However, the fresh air supplied through the stove’s built-in intake flap is sufficient. It is normal that the wood stove cannot reach the proper temperature and produces a lot of smoke gas when the flaps are closed. If “poor” – too moist firewood is used, it will be very smoky in the stove.
So, where is the problem now?
So, where is the problem now?
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