I have received my trueO2 filter, but it looks different than filters I have previously seen. How do I install it?
The trueO2 filter is placed in the opening of the air register, writing side first. The filter is made with zero-bypass edges to force all of the air received from the intake through the superior filter media (unlike typical air filters with a cardboard edge). Therefore, you may notice a little overhang from the filter frame – which is completely normal – but does not affect the closing of the register cover.