Air circulation option

In Auto, it is supposed to go to Recirc by itself if it smells foul air. You
can set the system to Auto, and then manually set Recirc to ON so the system
Recircs all of the time. You may want to do this when it's raining or foggy
because Recirc air will be dryer than outside air, and this will help the
glass to clear.




"sgfan3" <sfgan RemoveThis @bigfoot.com> wrote in message
news:ORrGe.34895$Iv5.12610@fe02.lga...
> My 2001 330ci has an air circulation option. One is supposedly used when
> the AC system is set to auto. The other is for "non" auto. I can't think
> of a single reason to have this switch. When re-circulation the air in the
> cabin, what difference does it make if the system is set to auto or
> non-auto? TIA
>
 >> Stay informed about: Air circulation option 

"J Strickland" <spam.DeleteThis@nospam.net> wrote in message
news:VcOdnQA058miynffRVn-rQ@ez2.net...
> In Auto, it is supposed to go to Recirc by itself if it smells foul air.
> You can set the system to Auto, and then manually set Recirc to ON so the
> system Recircs all of the time. You may want to do this when it's raining
> or foggy because Recirc air will be dryer than outside air, and this will
> help the glass to clear.

My experience is exactly the opposite. Inside air fogs the windshield and
outside air clears it off.
 >> Stay informed about: Air circulation option 

If the AC is on, Recirc should provide drier air than pulling from the
outside. If the AC is off, then the moisture in the air will simply build
and build if Recirs is on, then the windows will fog even worse. Setting the
Air Conditioner on is key. Some cars, not BMW, automatically set the AC on
and Recirc the air when Defrost is selected. I prefer the way BMW allows us
to set the life support systems however we want, but all automakers are not
so thoughtful.





"Ross Garrett" <frederickrossgarrett DeleteThis @hotmail.com> wrote in message
news:2ttGe.16$ab6.573@news.uswest.net...
>
> "J Strickland" <spam DeleteThis @nospam.net> wrote in message
> news:VcOdnQA058miynffRVn-rQ@ez2.net...
>> In Auto, it is supposed to go to Recirc by itself if it smells foul air.
>> You can set the system to Auto, and then manually set Recirc to ON so the
>> system Recircs all of the time. You may want to do this when it's raining
>> or foggy because Recirc air will be dryer than outside air, and this will
>> help the glass to clear.
>
> My experience is exactly the opposite. Inside air fogs the windshield and
> outside air clears it off.
>
 >> Stay informed about: Air circulation option 

"J Strickland" <spam.TakeThisOut@nospam.net> wrote in message
news:VPidnZWfqYrT8XffRVn-hg@ez2.net...

> If the AC is on,

That's the qualifier you needed to make....because the original poster
didn't distinguish between AC on or AC off.
 >> Stay informed about: Air circulation option 

Thanks everyone.


"J Strickland" <spam.RemoveThis@nospam.net> wrote in message
news:VcOdnQA058miynffRVn-rQ@ez2.net...
> In Auto, it is supposed to go to Recirc by itself if it smells foul air.
> You can set the system to Auto, and then manually set Recirc to ON so the
> system Recircs all of the time. You may want to do this when it's raining
> or foggy because Recirc air will be dryer than outside air, and this will
> help the glass to clear.
>
>
>
>
> "sgfan3" <sfgan.RemoveThis@bigfoot.com> wrote in message
> news:ORrGe.34895$Iv5.12610@fe02.lga...
>> My 2001 330ci has an air circulation option. One is supposedly used when
>> the AC system is set to auto. The other is for "non" auto. I can't think
>> of a single reason to have this switch. When re-circulation the air in
>> the cabin, what difference does it make if the system is set to auto or
>> non-auto? TIA
>>
>
>
 >> Stay informed about: Air circulation option 

In article <ORrGe.34895$Iv5.12610@fe02.lga>,
sgfan3 <sfgan.DeleteThis@bigfoot.com> wrote:
> My 2001 330ci has an air circulation option. One is supposedly used when
> the AC system is set to auto. The other is for "non" auto. I can't
> think of a single reason to have this switch.

Think you've misunderstood the meaning. Auto recirc has no link to auto on
the climate control - it simply defaults to fresh air, but changes to
recirc if it detects noisome air. It explains this in the driver's
handbook.

--
*Stable Relationships Are For Horses. *

Dave Plowman dave.DeleteThis@davenoise.co.uk London SW
To e-mail, change noise into sound.
 >> Stay informed about: Air circulation option 

Two things, turn off the HTML (Rich Text), and I don't know how it knows
that you are driving past a pasture or behind a bus. Certainly this is not
rocket science though, and is a relatively simple thing to ascertain. Clean
air has a certain electrical property, and if that property changes it is
safe to assume that the air isn't so fresh anymore.



"sgfan3" <sfgan.DeleteThis@bigfoot.com> wrote in message
news:J_wGe.3213$c63.1523@fe05.lga...
....so, it somehow knows a bad smell and keeps it from entering the cabin? If
the answer is yes, how does it know???


"J Strickland" <spam.DeleteThis@nospam.net> wrote in message
news:VcOdnQA058miynffRVn-rQ@ez2.net...
> In Auto, it is supposed to go to Recirc by itself if it smells foul air.
> You
> can set the system to Auto, and then manually set Recirc to ON so the
> system
> Recircs all of the time. You may want to do this when it's raining or
> foggy
> because Recirc air will be dryer than outside air, and this will help the
> glass to clear.
>
>
>
>
> "sgfan3" <sfgan.DeleteThis@bigfoot.com> wrote in message
> news:ORrGe.34895$Iv5.12610@fe02.lga...
>> My 2001 330ci has an air circulation option. One is supposedly used when
>> the AC system is set to auto. The other is for "non" auto. I can't think
>> of a single reason to have this switch. When re-circulation the air in
>> the
>> cabin, what difference does it make if the system is set to auto or
>> non-auto? TIA
>>
>
>
 >> Stay informed about: Air circulation option 

On Fri, 29 Jul 2005 15:01:28 -0700, "Jeff Strickland"
<crwlr.TakeThisOut@yahoo.com> wrote:

>Certainly this is not
>rocket science though, and is a relatively simple thing to ascertain. Clean
>air has a certain electrical property, and if that property changes it is
>safe to assume that the air isn't so fresh anymore.

Probably a bit like how your nose can recognize the smell of a fart in
100 milliseconds or so. The problem is making an electrical
sensor/circuit that will do it. Evidently, the motor makers already
did that. Now they need to develop the technology that will clearly
identify the offender, open the door and push him/her out of the car.
--
Dan.
 >> Stay informed about: Air circulation option 

"Dean Dark" <ddrake.TakeThisOut@comcast.notthis.net> wrote in message
news:udfle11irmfm75q3adfhr4u4v61o75j1mt@4ax.com...
> On Fri, 29 Jul 2005 15:01:28 -0700, "Jeff Strickland"
> <crwlr.TakeThisOut@yahoo.com> wrote:
>
>>Certainly this is not
>>rocket science though, and is a relatively simple thing to ascertain.
>>Clean
>>air has a certain electrical property, and if that property changes it is
>>safe to assume that the air isn't so fresh anymore.
>
> Probably a bit like how your nose can recognize the smell of a fart in
> 100 milliseconds or so. The problem is making an electrical
> sensor/circuit that will do it. Evidently, the motor makers already
> did that. Now they need to develop the technology that will clearly
> identify the offender, open the door and push him/her out of the car.


Or open the sunroof and launch the rockets ...
 >> Stay informed about: Air circulation option 

So why have a switch at all? Why not just let it be "always on" and keep the
smelly stuff out? Seems to be just one more thing that can go wrong.

Chris


"John Carrier" <jxc2.RemoveThis@comcast.net> wrote in message
news:j_udnZHu0eDgy3ffRVn-pQ@comcast.com...
>
> "sgfan3" <sfgan.RemoveThis@bigfoot.com> wrote in message
> news:ORrGe.34895$Iv5.12610@fe02.lga...
>> My 2001 330ci has an air circulation option. One is supposedly used when
>> the AC system is set to auto. The other is for "non" auto. I can't think
>> of a single reason to have this switch. When re-circulation the air in
>> the cabin, what difference does it make if the system is set to auto or
>> non-auto? TIA
>
> The concept is that in auto mode, the system will automatically switch to
> recirc when it encounters contaminated air (smoke, fumes, etc).
>
> R / John
>
 >> Stay informed about: Air circulation option 

How does it know the outside air is bad?

rtt


"John Carrier" <jxc2.TakeThisOut@comcast.net> wrote in message
news:j_udnZHu0eDgy3ffRVn-pQ@comcast.com...
>
> "sgfan3" <sfgan.TakeThisOut@bigfoot.com> wrote in message
> news:ORrGe.34895$Iv5.12610@fe02.lga...
> > My 2001 330ci has an air circulation option. One is supposedly used when
> > the AC system is set to auto. The other is for "non" auto. I can't think
> > of a single reason to have this switch. When re-circulation the air in
the
> > cabin, what difference does it make if the system is set to auto or
> > non-auto? TIA
>
> The concept is that in auto mode, the system will automatically switch to
> recirc when it encounters contaminated air (smoke, fumes, etc).
>
> R / John
>
>
 >> Stay informed about: Air circulation option 

In article <42eb059d$1_1@news.cybersurf.net>,
Richard Tomkins <tomkinsr RemoveThis @istop.com> wrote:
> How does it know the outside air is bad?

It just noes.

--
*Certain frogs can be frozen solid, then thawed, and survive *

Dave Plowman dave RemoveThis @davenoise.co.uk London SW
To e-mail, change noise into sound.
 >> Stay informed about: Air circulation option 

In article <FMzGe.3463$c63.1896@fe05.lga>,
sgfan3 <sfgan.TakeThisOut@bigfoot.com> wrote:
> Why not just let it be "always on" and keep the
> smelly stuff out? Seems to be just one more thing that can go wrong.

Perhaps that's why there is a switch? If it went wrong it might default to
the setting you didn't want?

--
*Fax is stronger than fiction *

Dave Plowman dave.TakeThisOut@davenoise.co.uk London SW
To e-mail, change noise into sound.
 >> Stay informed about: Air circulation option