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Ventilated seats in Model X- self contained or piped into the HVAC system?

Discussion in 'Model X' started by calisnow, Jan 29, 2016.

  1. calisnow

    calisnow Active Member

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    Does anyone know which method Tesla used to implement ventilated seats in the Model X?

    1 - Self contained cooling unit within the seat itself - perhaps using a peltier heat pump device like the aftermarket unit Katzkins sells

    or

    2 - Cool air pumped into the seat via ducting routed from the car's central a/c system
     
  2. goneskiian

    goneskiian Active Member

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    Why does it matter?

    Not trying to be snarky. Genuinely curious. ;-)
     
  3. calisnow

    calisnow Active Member

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    It's okay - I'm often snarky - I can take it even if you didn't mean it. :p I'm curious mainly because I have been postponing the delivery and build of my Model S for MONTHS in the hopes that ventilated seats would show up. Now I'm getting so tired of waiting I'm thinking I'll just get the car and then hope/pray that the ventilated seats are self contained and merely need power - and thus hopefully I'll be able to retrofit them eventually. If not I may just go aftermarket.

    Yes I realize I could order a Model X but personally I really find it ugly - I find it so ugly I'm getting an S despite the fact that the X clearly offers much better utility than the S and has that wonderful windshield with the great view. Eventually I'll have to buy an X anyway for kids - but this time around I want one last glorious sports sedan slung low to the ground. Fortunately for me my girlfriend does not come to these forums, and thus does not know that for only $10K more than the S I'm ordering I could have the electric minivan of her dreams. :)
     
  4. fiksegts

    fiksegts Active Member

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    self contained....
     
  5. pvogel

    pvogel Member

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    By what evidence? Heating, yes, that's contained in the seat. But it looked to me like the seats are just another set of AC vents you can turn on or off. There isn't an AC compressor in each seat, there's one AC compressor -- one of the engineers talking through the parts on the skateboard pointed out the AC compressor and how efficient it is in terms of the cooling relative to battery energy used.

    Peter+
     
  6. vandacca

    vandacca Active Member

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    I may have misunderstood, but I thought there were 2 AC compressors. One for the front and one for the rear (and only if you get 6/7 seat option). On the emergency response document, it's referred to as "Rear HVAC assembly".
     
  7. pvogel

    pvogel Member

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    Ah. That is possible, yes. But it's not seat only. That said, I think I saw individual fan controls for the seats, so the compressor is shared but each seat may have its own fan so each occupant can dial their own comfort eventually via the app and wifi in the car.
     
  8. Saghost

    Saghost Active Member

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    To the best of my knowledge, no one has ever built a car with A/C compressors in each seat.

    However, there are three versions of ventilated seats I've seen - some are just ventilated, blowing cabin air against the occupant, some have a specific A/C duct routed to them, blowing HVAC processed air against the occupant, and some have a Peltier type thermoelectric device built in, blowing cabin air that's been cooled inside the seat against the occupant.

    I believe the OP was attempting to request help in determining which of these three Tesla has adopted.

    Walter
     
  9. fiksegts

    fiksegts Active Member

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    just fans in seat, they are ventilated seats, not cooled, it's not hooked up to any ducts....


     
  10. DrComputer

    DrComputer Member

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  11. vandacca

    vandacca Active Member

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    It was my understanding that the front driver/passenger seats are heated & cooled/ventilated seats. The 2nd/3rd row may only be ventilated (with heating if you get the subzero package).
     
  12. kf93

    kf93 Member

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    I think too many times people equate ventilated with cooled, but it's not usually active cooling. We've had vented seats now in multiple Saabs and a M-B and both brands just put a fan that pulls the air into the seats and out the bottom. Pulls the cabin air, not anything cooled. I wasn't aware there were manufacturers blowing air out of the seats, that would be a way to implement true cooling, but probably a lot more complicated with moving seats trying to have a flexible duct.
     
  13. pvogel

    pvogel Member

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    Given the weight and relative inefficiency in various environments of thermoelectric systems, I'd be surprised if Tesla had gone that way. My expectation is there may be a fan per seat and each seat is a separate AC duct to which air can be routed.

    - - - Updated - - -

    The premium package lists them as "ventilated cooling seats" if I recall correctly. That implies some level of active cooling, and given the recommendation to heat/cool the seats, not the cabin because that's less efficient use of power, I would be surprised if all they did was blow cabin air through the seats.
     
  14. hockeythug

    hockeythug Active Member

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    Well, when is someone going to tear open one of their X front seats and settle this?

    :biggrin:
     
  15. Mark Z

    Mark Z Active Member

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    The fan only runs when in the "cool" mode (blue numbers on the touch screen control instead of red numbers). You can hear the fan run. One fan in the driver seat. One fan in the passenger seat. NO fans in the 2nd or 3rd row seats. The air does not feel "cold" or chilled. I only see a single wrapped electric cable bundle running to the seat, no A/C ducting. IMHO, I assume it is only circulating the cabin air. There are three settings for the amount of fan speed.

    When heating the seat, everything is quiet.

    The fans will turn off if seat heat is applied (using either the regular control or the separate heated seat controls on the touch screen for the subzero weather option).

    There isn't much air flow as a paper tissue or plastic bag does not move or bulge when against the seat surface. In my Model X, the passenger seat seems to have more flow to the seat surface while the driver seat has more flow under the seat corner! Another item to bring up to the Service Center. I wouldn't have known if this thread didn't exist.
     
  16. calisnow

    calisnow Active Member

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    I'm no engineer but these peltier units from Katzkins look pretty small and light. Installation begins at 8:00 in the video:

    Jeep Wrangler Interior - YouTube
     
  17. gjunky

    gjunky Waiting for the Model ☰

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    Thanks Mark. I know the question has come up before but did you notice any air flow coming from the seat back?
     
  18. Mark Z

    Mark Z Active Member

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    Glad you asked. My earlier post was wrong about one fan, there are two per seat! One fan is in the seat bottom and another fan is located under the headrest. You can hear the fan motors at both locations.

    The air flow is so subtle that I hardly feel any airflow at all at the highest fan speed.
     
  19. goneskiian

    goneskiian Active Member

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    #19 goneskiian, Jan 31, 2016
    Last edited: Jan 31, 2016
    Good point. I can imagine more than few other potential S buyers are waiting for them too.

    This thread has some great info! Thanks all! I had no idea how ventilated seats worked before reading.

    I have to address something you said here about the X clearly offering much better utility than the S. That topic is hotly debated. Well, OK, maybe not. It seems the S is actually more utilitarian with it's folding second row seats and ability to mount a roof rack (that doesn't need seasuckers anyway).
     
  20. SMSMD

    SMSMD Member

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    [QUOTE. You can hear the fan motors at both locations.[/QUOTE]

    How tolerable is the motor noise?? Any Vibrations?? Good to know the flow is subtle.
     

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