DIY Cabin Air Filter

[BailOut]

Originally Posted by YarisSedan

I think this mod would hinder the air flow slightly. If you ever look at a oem cabin air filter it has arrows that has to be installed a certain way. The way its designed to allow maximum air flow. If you take a filter thats not designed to be a cabin air filter it wont have the same type of flow rate.

Any filtration hinders flow to a certain degree, but your assumptions rely wholly on the assumption that a home blower filter restricts more than a car blower filter designed by some 3rd party to absolutely no one's specifications but their own. Your assumptions also assume that the direction of flow really matters, which it often does not (arrows are often put on there just to keep folks from asking questions, and the one that I used in the photographs is identical top and bottom).

The experience of myself and others that have done this DIY shows that it works just fine. I've been using my own filters for a year and a half now.

[1stToyota]

Originally Posted by BailOut

Any filtration hinders flow to a certain degree, but your assumptions rely wholly on the assumption that a home blower filter restricts more than a car blower filter designed by some 3rd party to absolutely no one's specifications but their own. Your assumptions also assume that the direction of flow really matters, which it often does not (arrows are often put on there just to keep folks from asking questions, and the one that I used in the photographs is identical top and bottom).

The experience of myself and others that have done this DIY shows that it works just fine. I've been using my own filters for a year and a half now.

Maybe the assumption is based upon store bought cabin filters being 100% filter (surface area) and DIY filters are bordered with cardboard and tape that migrates upon the filter surface area? Air won't flow through cardboard and tape.