So far, we have spoken with three fireplace installers, and each prefers a different option for the fresh air supply. We will choose a room-air-independent fireplace and therefore need a fresh air supply from outside. The following options were recommended to us:
1. Pipe through the foundation slab with a mushroom vent in the garden
2. Chimney with two adjacent flues, one for exhaust gases and one for fresh air (e.g., Schiedel Xpert)
3. Chimney with concentric fresh air supply (e.g., Erutec FLAS)
Option 1 can be relatively inexpensive, but we don’t want a pipe or mushroom vent visible outdoors.
We like option 2.
Option 3 is supposed to preheat the incoming fresh air, improving combustion. On the other hand, I imagine that the warming fresh air might have difficulty sinking downwards, which could make its functionality dependent on weather conditions and therefore somewhat unreliable.
Do you have any good advice on this?
1. Pipe through the foundation slab with a mushroom vent in the garden
2. Chimney with two adjacent flues, one for exhaust gases and one for fresh air (e.g., Schiedel Xpert)
3. Chimney with concentric fresh air supply (e.g., Erutec FLAS)
Option 1 can be relatively inexpensive, but we don’t want a pipe or mushroom vent visible outdoors.
We like option 2.
Option 3 is supposed to preheat the incoming fresh air, improving combustion. On the other hand, I imagine that the warming fresh air might have difficulty sinking downwards, which could make its functionality dependent on weather conditions and therefore somewhat unreliable.
Do you have any good advice on this?
N
nordanney16 Jun 2016 11:27DragonyxXL schrieb:
As I understand it, the pipe can’t be run through half the garden, but should ideally go straight outside from the chimney. If that’s the case, we don’t want it positioned in the corner. Well, the house probably has four sides – you can place the pipe on any side.
The additional cost over the Schiedel Absolut was four figures (at about 12m (39 feet) height) – compared to the cheaper option (concrete, no recessed pipe or similar), which does exactly what it’s supposed to do.
D
DragonyxXL16 Jun 2016 12:56nordanney schrieb:
Well, the house probably has four sides – you can place the pipe on any side. Is that really the case? Our house has many sides because it’s not square-shaped. We could place the stove in a corner where we don’t want it, about 4m (13 feet) away from the chimney. Other sides where we would prefer to install it are nearly 10m (33 feet) distant. We were told that the greater the distance, the larger the required cross-section. Even so, I don’t want a pipe with a diameter of 0.5m (20 inches) in the corner where it would look best aesthetically.
N
nordanney16 Jun 2016 13:03DragonyxXL schrieb:
Is that so? Our house has many sides because it’s not square. We could place the chimney in a corner where we don’t want it, at about 4m (13 feet) distance from the stove. Other locations where we would like to place it would be almost 10m (33 feet) away. We were told that the larger the distance, the bigger the required diameter. Even in the corner where it could be placed more aesthetically, I don’t want a pipe with a 0.5m (20 inches) diameter. So, "probably"
For us, it’s about 6-8m (20-26 feet) with a 20mm or 25mm (0.8 or 1 inch) pipe. It then sticks out about 30cm (12 inches) from the ground – hidden among plants, so not visible.
Of course, the chimney with integrated air supply is more elegant, but as I said, simply much too expensive.
N
nasenmann16 Jun 2016 13:18Well, saying it's much too expensive is really a strong statement in this case. I mean, the extra cost for me would have been at most 200-300 euros (220-330 US dollars). When I compare that to what the chimney and stove already cost me as basically a nice-to-have, it doesn’t make that big of a difference. In return, it’s done properly, and I don’t have to hide anything.
N
nordanney16 Jun 2016 15:22nasenmann schrieb:
I think my additional cost was around 200-300 euros max. Then your "standard" chimney must have been a very high-quality version.
Maybe you could share what the chimney cost you. We paid about €1,500 (roughly $1,600) for around 12 meters (39 feet), including two inspection hatches and a cover plate. The internal diameter of the chimney is 25cm (10 inches) square – so quite an expensive option.
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