A/C filter question


Old 07-13-18, 11:24 AM
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A/C filter question

Hi. I have this Carrier a/c in my attic: FV4ANF005 (it was here when we bought the house)

For 6 years now I've always just used the 'traditional' 1" pleated filter.

However, I was just googling replacement filters and came across this: https://www.appliancefactoryparts.co...277406/110483/

Should I be using it along with the pleated filter?

On a related note, I believe I need this size filter: 19 7/8" x 21 1/2" x 3/4" , and that's what I've always used, but I'd like to know for certain what is the exact correct size I should use.

Here's a snapshot of a sticker on my a/c:


and I found this in an online manual:


This one, KFAFK0312LRG, seems to match up with the size I've been using the past few years (though it relates to the other kind of filter mentioned above).

In summary, 2 questions;

1) should I be using the 'blue' filter along with the regular pleated filter, and
2) what is the exact size (or model # would be great) of pleated filter that I should use?

I usually user Merv 8 if that helps.

I was planning on order this: 19 7/8 x 21 1/2 x 1 MERV 8 Furnace Filters | Air Filters Delivered unless you guys tell me otherwise.

Thanks for any help/clarification!
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