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Old 12-30-2003, 07:15 PM   #1
PeterJ
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Have a Nice Day? Subaru interior air filtration system

I replased mine at 30K and there was a bunch of sand and bugs in it, so I think that its worthwhile, but $30 for the replacement stinks. I heard that people use cut-up home hvac system filters from the hardware store and they work fine; plus, 1 home filter yields 4 subaru ones. Im going to try that next time.
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Old 12-31-2003, 03:24 AM   #2
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I hosed mine down, left it in the sun for a couple hours, then put it back in. Works fine.
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Old 12-31-2003, 12:14 PM   #3
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I've been making my own filters out of home furnace filters since day one(NOV01). Works great.

That reminds me...time to make a new one....
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Old 12-31-2003, 02:28 PM   #4
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Exclamation what a dirty interior filter looks like..

Thought it might be useful to provide a reference for those who doubt how dirty an interior air filter can get!

The one shown below resided in my wrx for just over a year, I took it out and replaced it at 22,000 KM




-- Dendrobium

Last edited by Dendrobium; 12-31-2003 at 03:48 PM.
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Old 12-31-2003, 05:14 PM   #5
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Default Re: what a dirty interior filter looks like..

Quote:
Originally posted by Dendrobium
Thought it might be useful to provide a reference for those who doubt how dirty an interior air filter can get!

The one shown below resided in my wrx for just over a year, I took it out and replaced it at 22,000 KM




-- Dendrobium
Mine look like that after about a month.....
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Old 01-04-2004, 04:21 AM   #6
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it rains a lot where I live so I guess the air may be "cleaner" than most places most of the time.

OTOH, it gets pretty smoggy/polleny in the spring/summer - normally I get allergies - this year I didn't - perhaps it was due to driving in my wrx w/ the in-cabin filter?

It makes me wonder what other cars/brands support installation of in-cabin air filters?



-- Dendrobium
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Old 01-04-2004, 02:07 PM   #7
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where does this filter reside? i got this option when i bought the car but i never thought about it.
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Old 01-04-2004, 02:29 PM   #8
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Take out your glove box. Behind it you will see a white "trap door". Open that and the filter is inside. When you pull it out expect it to be very dirty if you've never inspected or changed it.
I've vacuumed and reinstalled mine a few times but it's getting to the point where I'll have to replace it soon.
Anyone have an actual part or model # for the furnace filters that work? I've seen them in Home Depot but they weren't the same thickness as the OEM filter.
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Old 01-06-2004, 12:43 AM   #9
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Quote:
Originally posted by mulder
Anyone have an actual part or model # for the furnace filters that work? I've seen them in Home Depot but they weren't the same thickness as the OEM filter.
I've used two thus far and both have worked well.

The "Web Plus" filter, with directions on my site:
http://www.owlnet.rice.edu/~anguyen/...binfilter.html

The problem with the webplus is that it isn't rated very highly in consumer reports. I decided to switch to a better rated filter.


The 3M Filtrete High Efficiency filters (I bought the 3M Filtrete Ultra Allergen Filter -- its the one that's purple) are rated very very well on consumer reports and I've also tried this. This one is harder to jam in there because it doesn't have the stiff plastic frame that the webplus has. Cutting the filter also is rough because of the metal (electrostatic ?) grating or whatever it is -- I reccomend wrapping the border/edges of this filter with duct tape. I'll dig up some pics of these if anyone wants.
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Old 01-06-2004, 02:44 AM   #10
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Quote:
Originally posted by NeoteriX
The 3M Filtrete High Efficiency filters (I bought the 3M Filtrete Ultra Allergen Filter -- its the one that's purple) are rated very very well on consumer reports and I've also tried this. This one is harder to jam in there because it doesn't have the stiff plastic frame that the webplus has. Cutting the filter also is rough because of the metal (electrostatic ?) grating or whatever it is -- I reccomend wrapping the border/edges of this filter with duct tape.
These are what I use. I mark the filter and cut the wire on each side and then cut the filter material itself. I then tape with white cloth surgical tape(I have several large rolls of just the right width) around the edges.
I unplug the blower motor, and it makes sliding the filter in a lot easier.
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Old 01-06-2004, 04:53 PM   #11
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Awesome. I took my car in for an oil change today and the dealer (yeah yeah, I had a coupon) told me it would be $80(!) to change. I'll go pick up one of those filters today.
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Old 01-06-2004, 08:15 PM   #12
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Default Pic of Filter location..

I've never seen a pic of exactly where the filter is located, so here's a pic:



NOTE: I had to undo 9 screws to remove the glovebox, contrary to the filter installation instructions that specifies you must remove only 7 screws.

I think N. Americaon Imprezas probably all all have 9 screws. Perhaps the first GD's and GG's ('01 models in Japan and Europe had only 7 screws?)

-- Dendrobium
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Old 01-10-2004, 04:07 PM   #13
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Is the box and all still there if it was not ordered as an option? Can I just put a filter in there and have it work?
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Old 01-10-2004, 09:07 PM   #14
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Yes. The only thing missing is the filter itself.
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Old 01-11-2004, 03:47 AM   #15
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Default I second that...

Yeah, I went out to check my filter yesterday. I pulled off the cover and there was no filter!! Oh well, I cut up a home a/c filter 8" x 7.5" and stuffed it in there. I thought it would slow down the airflow, but it did not.

Woody
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Old 01-11-2004, 04:10 AM   #16
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I'll usually sit down and cut up one whole pannel while I'm watching the tube, or whatever, and just have them ready to install.
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Old 01-16-2004, 12:32 AM   #17
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For sure get the 3m hypo-allergenic filters from home depot or something along those lines. They are thin and flow good.
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Old 01-16-2004, 03:52 PM   #18
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so every car is equiped with the box, just the filter is an option is my take on it... can some one confirm this? i dont want to take mine apart and find out. its -30 here, and i just want to make 110% sure before i order the filter.

thansk
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Old 01-16-2004, 04:18 PM   #19
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I checked behind the glovebox, and sure enough the filter box is there. All I needed was a filter. Off to home depot I went and bought a filter. I am in the process of cutting it up and it a PITA. Any tips on cutting?
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Old 01-16-2004, 07:59 PM   #20
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Quote:
Originally posted by atomicapples
so every car is equiped with the box, just the filter is an option is my take on it...
yes.
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Old 01-16-2004, 08:14 PM   #21
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Quote:
Originally posted by FortyTwo
Any tips on cutting?
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Old 01-17-2004, 01:37 AM   #22
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I use 'kitchen shears'...just cheapie ones that I got at the flea market for a couple bux.....I measure and mark the filter with a sharpie and then just cut the wire mesh on either side(if the filter you use has it....some do some don't) and then cut the filter media...tape around the cut edge...I use cloth surgical tape... and done.
I don't know how important it is for this application, but I make sure to note airflow direction on each piece I cut to get it in the correct orientation.
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Old 01-18-2004, 02:50 PM   #23
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Thanks.
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Old 01-20-2004, 04:06 PM   #24
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Quote:
Originally posted by mulder
Yes. The only thing missing is the filter itself.
I was gonna ask this question, and thanks for everybody's reply.

I need to stop by the Home Depot.
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Old 01-29-2004, 10:48 AM   #25
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handy thread!!
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