ᐅ Which Type of Chimney?

Created on: 16 Jun 2016 09:15

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?

T2115016 Jun 2016 17:04

#19

DragonyxXL schrieb:
We want to keep our options open for the garden and terrace design, so we really don’t want the fireplace to dictate where a bush should be planted.

Can anyone understand the argument against this option?

Yes!

I personally wouldn’t like that either.

We went with option 2 (Schiedel).

Works perfectly.

Best regards,
Thorsten

K1300S16 Jun 2016 18:30

#20

Here is version 3 (Hillen Osmotec LAS-F), which was available at a comparable price to (1) and (2). It works perfectly and, in my opinion, is the most coherent option. However, I also have a masonry chimney, so the square chimney is not visible.

Good luck

K1300S

nasenmann16 Jun 2016 18:36

#21

nordanney schrieb:
Then your "standard" chimney must have been a very high-quality version.
Maybe you could share how much the chimney cost you. Ours was about €15,000 (ca. $16,200) for approximately 12m (39 feet), including two inspection hatches and a cover plate. The internal diameter of the chimney is 25cm (10 inches) square – so it's quite an expensive version.

I didn’t manage to find the first quote quickly. But for sure, our price now starts with a 2.

blockhauspower16 Jun 2016 18:42

#22

With Tona chimneys, there is already a gap between the flue pipe and the outer casing stone, which can be used for the intake air.

Regards

nasenmann16 Jun 2016 19:25

#23

You are right. I can’t quite figure it out anymore either, especially since I can’t find the offer anymore. Maybe the first offer was from a different manufacturer.
But anyway, I’m satisfied with the solution as it is now. And the supply air doesn’t get so warm (hot) that the stove wouldn’t draw properly.
It’s not like cold air has to fall down there. The hot air is drawn out through the flue pipe, and the stove has no choice but to pull supply air from wherever it can.

Sebastian7916 Jun 2016 20:55

#24

My chimney sweep and the chimney builder both told me that these fresh air chimneys are useless because there are situations where the draft doesn’t work properly.

We have a standard Schiedel chimney, which has a round fireclay liner inside, which is supposedly great, but drilling into it is a complete nightmare. And in our case, it was drilled at an angle...

@andimann: You have a basement, so I don’t understand why you didn’t run the fresh air supply through it? I have a hole in the wall, with an air duct in front of it, and that’s it—no mold, no extra costs.

ᐅ Which Type of Chimney?

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