04-13-2019, 07:14 PM | #1 |
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Ventilated seats
Obviously ventilated seats aren't cooled seats, but I can't seem to feel anything coming out of them. The fans in the seats are loud but it seems like they are blowing nothing even when the a/c is on Max. Is this pretty common?
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04-13-2019, 07:42 PM | #2 |
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One thing that comes to mind is that someone may have used a leather cleaner/conditioner at some point and clogged up some of the perforations. Aside from that I'm not really sure.
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04-13-2019, 09:47 PM | #3 | |
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The wording in the BMW TIS says: "The active seat ventilation enables individual cooling of the seat cushions and backrests. "My interpretation is...the fans are intended to affect the temperature of the seat cushions...not to blow air on the passenger or "directly" cool the passenger...it is designed to affect the temp/comfort of the seat by blowing air onto the rear and underside of the seat. Here's a direct link to seat ventilation on the TIS website:
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04-13-2019, 10:01 PM | #4 |
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I used it last year in the summer. It seemed to only work with my AC cranked, but the seat did get cool. I like to drive with my windows down a bit so I like having this feature.
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04-13-2019, 10:39 PM | #5 |
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Im not the first owner, so its possible, might have to look at ways to clean them out at a deep level, as on the surface they seem pretty clean.
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04-13-2019, 10:40 PM | #6 | |
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04-13-2019, 10:42 PM | #7 | |
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04-13-2019, 10:42 PM | #8 |
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04-14-2019, 11:21 AM | #11 |
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Has anyone actually seen the fans operating to know which direction the air flow is? Do the fans blow the cabin's ambient temp air onto the seat bottom/seat back...or does it draw air away from them? If the latter...perhaps thats what the holes in the leather is for...to allow air to be drawn through the seats...similar to how some vented rooms/buildings have fans that are sucking the air out of it to the exterior...instead of blowing air into the room from outside.
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04-14-2019, 04:04 PM | #12 | |
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04-14-2019, 04:06 PM | #13 |
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04-14-2019, 04:06 PM | #14 |
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04-14-2019, 10:49 PM | #15 |
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I usually just have my system on 69 degrees and auto (medium fan). When I hit cooling on the seats, I hear the airflow behind me immediately. If I turn it off I hear it stop. I can feel a modest flow from the perforations of seat.
I feel this now post-nbtEVO install and also pre. |
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04-14-2019, 11:10 PM | #16 | |
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04-15-2019, 07:42 AM | #17 | |
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04-15-2019, 01:32 PM | #19 | ||
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And the question as to the direction of airflow would be interesting to know because when this topic is discussed on other BMW forums...a large percentage of owners state that they don't feel air blowing "from" the seats. So if the fans are designed to "vent" (since the option is called ventilated seats)...their design may be to diminish back and butt sweat on hot days by pulling air through the seats...and not designed to blow air onto the back and butt of the passenger. Think about the sun roof...when it is in the "vented" position...it is designed for air to flow out of the cabin...not into it. Here's more images from the TIS in regards to the ventilated seat fans. There are 5 in the seat bottom (M159 - M163)...and 4 in the seat back (M164a-M167a)...and I'm still inclined to think that they may be drawing air through the seat versus blowing air onto the seats:
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04-15-2019, 02:04 PM | #20 | ||
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May turn them on later to see if I can tell if there is any air flow (going in or coming out) through the holes. |
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04-16-2019, 08:28 AM | #22 |
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Just thought of something...if someone had something like a smoke machine...that might reveal if the fans suck air into or blow air out from the seats.
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