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What effect does turning outside air off have Pls?

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Meaning, does it stop unpleasant exhausts from arriving in the car, or it means that the air conditioning (whatever) filters it to stop it from coming into the cabin?

Thank you.

Mo

When it's on recirculate it doesn't bring in air from outside the car to blow through the vents , but instead collects air under the dash somewhere.

This will be handy if you are following a very stinky lorry , or want to warm the car quicker on a cold day but when used for a long time it will start to feel stale inside the car.

  • Author
When it's on recirculate it doesn't bring in air from outside the car to blow through the vents , but instead collects air under the dash somewhere.

This will be handy if you are following a very stinky lorry , or want to warm the car quicker on a cold day but when used for a long time it will start to feel stale inside the car.

Thank you :)

Mo

When it's on recirculate it doesn't bring in air from outside the car to blow through the vents , but instead collects air under the dash somewhere.

This will be handy if you are following a very stinky lorry , or want to warm the car quicker on a cold day but when used for a long time it will start to feel stale inside the car.

mmmmmmmmm.........If you leave the recirculated button turned on for a long time could you end up sufffocating yourself as you would eventually use all the oxygen up............Just a Thought......................:confused:

Also leaving re-circ on will mist up all the inside windows without warning leaving you blind on a country road with no option but to stop and put hazards on until you turn the re-circ off and wait for it to de-mist.

Scared the life out of me and since then never used re-circ.

mmmmmmmmm.........If you leave the recirculated button turned on for a long time could you end up sufffocating yourself as you would eventually use all the oxygen up............Just a Thought......................:confused:

Forgive me if I am wrong, but I didnt think cars were air tight.;)

It stops the outside air getting in and recirculates the air within the car. It does this by operating a flap that's shaped like a flattened L in section. On 'fresh air', one side of the L is pressed against one half of the fan casing, which lets the air outside in, and keeps the air already inside from going back into the fan. When you change it to 're-circulate', the flap rotates so that the other side is pressed against the other half of the fan casing, and this keeps the air outside out, and lets the air already inside into the fan. There are some flap valves at the back of the car that use pressure differentials to fully 'isolate' the car when it's on re-circ, without resorting to using another powered system. As has been said, it's not an airtight seal - there are still leaks here and there, but the overall effect still stands...

The air passes through the pollen filter and over the air con condenser whichever way you set the air. It can help to have the air con on re-circulate when you first start the car on a hot day, as you're re-cooling air that's already been chilled a bit 'last time round' but other than that, the only advantage is to temporarily stop smelly air getting into the car. It won't make much of a difference in terms of dust or pollen.

HTH

Forgive me if I am wrong, but I didnt think cars were air tight.;)

I forgive you....:D

I forgive you....:D
:rofl: I cant quite imagine having to open your car door to get in, then having to leave it open so it could feel with air before you drive off.
Forgive me if I am wrong, but I didnt think cars were air tight.;)

A pre '67 VW beetle can float on a pond, its that air-tight. Other that that, they're not air tight.

:rofl: I cant quite imagine having to open your car door to get in, then having to leave it open so it could feel with air before you drive off.

Funny things cars...........The wife reckons you should carry a bucket of water to dip the headlights and open the door to let the clutch out.............:)

A pre '67 VW beetle can float on a pond, its that air-tight.

Does it still float if you open the window? ;)

Chris

A pre '67 VW beetle can float on a pond, its that air-tight. Other that that, they're not air tight.

A 1966 model might have been able to float in 1966 - they're not the best for rust though, are they?! I reckon you might get wet feet if you tried it now!!!

They added air vents because it was impossible to shut the doors quickly :rofl:

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Funny things cars...........The wife reckons you should carry a bucket of water to dip the headlights and open the door to let the clutch out.............:)

I reckon my car would float if only from the amount of hot air emitted from back seat driver. However, if car falls below water line, said passenger will be considered ballast :D

Many thanks apOgee.

Mo

  • Author

Sorry, forgot to ask whether it's true or not that if your car is under water, you have to open the windows (hopefully manually as electrics probs would be ineffective), then waiting until the inside and outside pressure equalised so that you can open the door to get out?

Totally irrelevant - I'm just wondering how much one can believe from films. I mean, wouldn't you open the door as soon as in the water (when it should still be possible)?

Sorry, but you know how my brain works - or not :rofl:

Mo

I think (the ever informative!) TG did a test on this very thing, trying to drown Hamster. If the car is in the water, you will need to either open the window or wait for the car to fill up, to equalise the pressure enough to open the door. Their advice was to open the door as soon as you hit the water, and get out!

Chris

I think (the ever informative!) TG did a test on this very thing, trying to drown Hamster. If the car is in the water, you will need to either open the window or wait for the car to fill up, to equalise the pressure enough to open the door. Their advice was to open the door as soon as you hit the water, and get out!

Chris

You could just keep an eye out for these:

signs125.gif

It's easier in the long run IMHO! :thumbup::D

It's easier in the long run IMHO! :thumbup::D

:rofl::rofl::rofl:

I guess it depends how much you like the car! :rofl:

Chris

Does it still float if you open the window? ;)

Chris

Yes, the waterline is below the bottom edges of the windows. I've seen photos of one that, equipped with exhaust extensions and a propellor, was "driven" from the IoM to somewhere on the Lancashire or Lake District coast (can't remember where).

Yes, the waterline is below the bottom edges of the windows. I've seen photos of one that, equipped with exhaust extensions and a propellor, was "driven" from the IoM to somewhere on the Lancashire or Lake District coast (can't remember where).

My comment was tongue in cheek as Mr Gooch mentioned that the car floated because it was "air-tight" ;)

Chris

My comment was tongue in cheek as Mr Gooch mentioned that the car floated because it was "air-tight" ;)

Chris

Wasn't clear on that, largely cos, up until Vw added the extractor vents (some time in 1970 I think) the car was pretty much 100% airtight with the windows and heater vents closed.

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