Which exhaust air channels can share a flue in the chimney?
I have a masonry chimney in a villa from '47. We are in the process of renovating and will need to route through the chimney for a kitchen fan, wood-burning stove, and exhaust air (ventilation).
Can, for example, an exhaust vent and a kitchen fan share a flue, or is there a risk of the fan air being pushed back out through the exhaust vent?
I assume that different exhaust vents can share a channel in the chimney as natural draft should handle the rest.
I have a masonry chimney in a villa from '47. We are in the process of renovating and will need to route through the chimney for a kitchen fan, wood-burning stove, and exhaust air (ventilation).
Can, for example, an exhaust vent and a kitchen fan share a flue, or is there a risk of the fan air being pushed back out through the exhaust vent?
I assume that different exhaust vents can share a channel in the chimney as natural draft should handle the rest.
The kitchen fan creates positive pressure in the duct/pipe.
If you need natural draft for the ventilation, it might be unsuitable to use this duct for your fireplace, as it could cause smoke throughout the house and the fireplace might have improper draft in the chimney.
If you need natural draft for the ventilation, it might be unsuitable to use this duct for your fireplace, as it could cause smoke throughout the house and the fireplace might have improper draft in the chimney.
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It's not only inappropriate but totally forbidden to, so to speak, connect anything to a flue/channel that is in use. Such a channel is, to put it mildly, dedicated to one purpose, and you never ever connect anything else there.
How to best allocate channels should be discussed with your chimney sweep. They are actually more than skilled at this, including ventilation issues.
Call and talk to them, why not?
And sorry if the first paragraph here sounded harsh, but it was a bit of a continuation from the previous post, so no one thinks they can connect ventilation to a flue.
/Kent
How to best allocate channels should be discussed with your chimney sweep. They are actually more than skilled at this, including ventilation issues.
Call and talk to them, why not?
And sorry if the first paragraph here sounded harsh, but it was a bit of a continuation from the previous post, so no one thinks they can connect ventilation to a flue.
/Kent
Thank you for the information everyone. And I don't think it sounded sour, just informative and firm 
There will be a separate duct for the kitchen fan. But for ventilation, it should be okay to connect to a duct twice, right?
I'll call and talk a bit with the local chimney sweep too.
There will be a separate duct for the kitchen fan. But for ventilation, it should be okay to connect to a duct twice, right?
I'll call and talk a bit with the local chimney sweep too.