Mine always had arrows down and trapped dirt on top.

EDIT: here's a video I found on the interwebs that confirms arrows should point down. But if you pay close attention, the filter they pulled out had an arrow pointing up. 😂

 

Mine always had arrows down and trapped dirt on top.

EDIT: here's a video I found on the interwebs that confirms arrows should point down. But if you pay close attention, the filter they pulled out had an arrow pointing up. [emoji23]

Exactly. So I’m not nuts. Mine was definitely up. I mean what’s the downside of it being backwards? Restricted air flow.


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I found mine up too But now its correct.

 

If you put it in backwards, your cabin will smell like poo. (I don't actually know, I put my cabin filters in the correct direction)

If you're mixed up about arrows, just run the HVAC system to figure out which way air flows and stick it in the right way.

 

Unless that was sarcasm, it might explain the mystery stench my sis has been experiencing.💩

 

Air should be coming from outside to the blower motor.

So air flow should be in a downward direction.

 

I’m getting mixed answers on up or down. I replaced mine. And swore the arrows were up indicating upward air flow.

Second guessing myself because the top side of the filter is the dirty side. If the air flow was upwards, wouldn’t the bottom of the filter be dirty?

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Dirt should be on the top of the cabin air filter.... Air is coming from outside to the blower motor in a downward direction

 

Down seems to be the winner. Looks like they installed mine upside down from the factory


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Somehow, I don’t feel it matters, as long as it fits.

Ive never seen anyone try to figure out which side of the Kleenex faces outward before they blow their nose either, come to think of it.

 

A Dealership Quick-Lube service installed mine wrong (air flow up).
I found the error while doing a DIY filter change.

The filter will work up or down . . .
However, they work much better when installed in the correct orientation to the air flow.

These are multi-stage (layer) filters. The 'air holes' on the layer Facing the incoming air are larger than the 'air holes' on the opposite side outer most layer when in the correct orientation. So when installed backwards the filter will clog faster and there will be a deeper layer of dirt/dust on the filter then when they are installed with the correct orientation.

 

To me it’s pretty simple it’s just as your furnace filter has an arrow showing air flow. The arrow shows direction of air flow. On your furnace the air comes from the outside and flows toward the furnace. Your cabin filter gets its air coming into the top of of the filter. So therefore the arrow would go down showing direction of the air flow just like your furnace outside to inside.

 

HAHA. Just changed mine... It was installed OEM upside down..... morons

 

I'm about to replace mine as I just bought a 2016 truck and doubt its been changed, fairly straight forward job it seems.

 

I’m getting mixed answers on up or down. I replaced mine. And swore the arrows were up indicating upward air flow.

Second guessing myself because the top side of the filter is the dirty side. If the air flow was upwards, wouldn’t the bottom of the filter be dirty?

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Just changed my own (2016 Colorado), and it was indeed installed upside down, with the air flow indication pointing upward. WTF!?!

 

Well it only matters if the Cabin Air Filter actually has a "sticky" side, to catch debris and smaller particles

 

That’s what confused me…the guy says “down”, but one the one he replaced, arrows pointed “up”

 

Yes since the Air is coming from the higher part of the firewall to the Cabin Air Filter in our trucks the Arrow should point down
But, unless you are you a specialixed filter that has a "sticky" side. It does not matter
The air will flow through fine.
I have seen them come from the Factory by all the Manufactures with the Arrows pointing in the wrong direction