Hi! Hoping for some help. We are going to renovate the kitchen in an apartment where you cannot connect a fan directly to the ventilation and must use a carbon filter fan. My question is whether the carbon filter fan can be mounted so that the "chimney" still covers the ventilation, like in the picture, but with the chimney placed 2 decimeters to the right and covering the ventilation. There are ventilation holes on the sides of the chimney. Any wise forum member who can guide?
I perceived that the hood also has ventilation holes at about the same height as the vent?
If those openings have an area significantly larger than the open area in the vent, then the hood itself shouldn't disturb the ventilation.
But now I suspect that if it's a carbon filter fan, those holes might be intended as an outlet from the carbon filters? In that case, there might be overpressure inside the holes, and the fan might still push air into the vent.
So it's probably questionable to do so.
Then there's another point of view. It must be possible to measure the flow in the vent, if you have a hood over it, it must be relatively easy to remove the hood to measure the flow. The instrument is like a funnel you press against the vent, it is larger than the vent.
If those openings have an area significantly larger than the open area in the vent, then the hood itself shouldn't disturb the ventilation.
But now I suspect that if it's a carbon filter fan, those holes might be intended as an outlet from the carbon filters? In that case, there might be overpressure inside the holes, and the fan might still push air into the vent.
So it's probably questionable to do so.
Then there's another point of view. It must be possible to measure the flow in the vent, if you have a hood over it, it must be relatively easy to remove the hood to measure the flow. The instrument is like a funnel you press against the vent, it is larger than the vent.
wise, thanks! Yes, exactly, the ventilation holes in the carbon filter fan's chimney are intended for exhaust, and it's likely that the exhaust air, when the fan is switched on, is instead pushed into the ventilation hole in the wall, which is probably not popular among neighbors and the ventilation inspector.
But doesn't it look ugly if the chimney doesn't go all the way up to the ceiling? Or does anyone have tips on a reasonably nice wall-mounted carbon filter fan that doesn't have a chimney and isn't intended for installation in a wall cabinet?
thanks
But doesn't it look ugly if the chimney doesn't go all the way up to the ceiling? Or does anyone have tips on a reasonably nice wall-mounted carbon filter fan that doesn't have a chimney and isn't intended for installation in a wall cabinet?
thanks
Do you have natural ventilation or regular exhaust ventilation?
You should not cover it as it should be exhaust air in the kitchen.
But as another commented, it's the opposite; if you cover it, the neighbors get more ventilation. If more do the same, other neighbors will find it difficult to open the front door
You should not cover it as it should be exhaust air in the kitchen.
But as another commented, it's the opposite; if you cover it, the neighbors get more ventilation. If more do the same, other neighbors will find it difficult to open the front door
I am answering my own question if anyone else has similar problems. I will buy IKEA's wall-mounted fan Bejublad with a carbon filter and install it without the chimney. It looked really nice when I saw it installed like that at Ikea Kungens Kurva.
That construction (the one in the first picture with a long box snug next to the vent) I would have sworn at heartily back in the day when I was running around with the svema-instrument!J joelhellstrand said:
It's the variant where I would have refrained from measuring, written down a number (an informed guess), and then reported and invoiced!
svema-instrument = the funnel with strain measuring wires inside used for measuring air flow at exhaust vents (you can also, with a diagram, a ruler, and pressure differential measurement, check the flow, but sveman is fast.)
9.3 l/s type?S skaraborgsfakir said:
No, but rather how many turns the plate should be unscrewed from the bottom, no figure for what the flow became.Griffeltavlan said:
Hi @joel_h do you have a picture? We are in exactly the same situation now and have googled a lot about this and finally found you with the same dilemma.J joel_h said:
We were in a similar situation during renovation. We chose to have the "chimney" from the recirculating fan near the ventilation but covered the outlet on that side. So it only blew on the other side. Since we also had a tall cabinet next to the covered outlet, the fan became significantly more efficient. Previously, the air streamed out towards the tall cabinet and then down towards the stove, causing smoke and steam to escape into the kitchen instead of being drawn into the fan.
We also had ventilation technicians from the association on-site afterward, and they were satisfied with our solution (they measured and checked things, but exactly what I don't know, it was a general matter for the association).
We also had ventilation technicians from the association on-site afterward, and they were satisfied with our solution (they measured and checked things, but exactly what I don't know, it was a general matter for the association).
G g.kraft said:
Okay, interesting to hear more solutions! Do you have a picture? But then your ventilation wasn't in the way of the "chimney", just close to it? Our ventilation is placed so we need to have a shorter "chimney", and just like Joel wrote, we wonder how nice it will look!
Nice!!J joel_h said: