- Brand: Aerostar
- Material: Synthetic
- Product Dimensions: 26″L x 20″W x 4″Th
- MERV Rating: 13
- Compatible Devices: Air Cleaner
- Item Weight: 2.5 Pounds
- MERV 13 Efficiency Rating, Nominal Size: 20x26x4, Actual Size: 20x26x4 1/8
- Fits in Air cleaner models 1210, 2210, 3210 and 4200
- Can be used in Air cleaner models 2200 and 2120 if cabinet is upgraded with 1213 Media Upgrade Kit
- Also replaces Source-1 part S1-FM213 , AprilAire is a trademark owned by Research Products Corporation. The seller of this product is not affiliated with or endorsed by Research Products Corporation.


















Kobe Gallagher –
Seemed as good as original.Had metal supports easy to install
Matt –
It doesn’t have the channels to lock onto the top and bottom like the official 213 media does. With this one, the metal brackets fit inside the upgraded kit’s brackets and the height was just enough to “fill” the space. First time using this product so I don’t yet know how good of a seal it will have.
Zach –
Doesn’t fit the same way in to the box as an aprilaire 213 filter. The 213 actually slides in on rails and that is how it seals this does not. The other thing is it is supposed to be a 2 pack for this price. Only one came in the box so it made it actually more expensive than the right filter. Lesson learned don’t try and save money with this garbage.
Kelly F –
I ordered a two pack, and I only received one filter.
Lisa S. Johnson –
nice not having to go find these in the store
Jess –
Product arrived faster than originally estimated in great condition. Received two filters just as described on the product page. The filters fit great! I’m happy to have found a lower cost alternative! Will be buying again for sure!
Marie –
Easy to replace in furnace
Will Allgood –
I purchased this to replace the filter in my unit, but the product doesn’t match what I pulled out of my conditioner. It says it should replace an Aprilaire model 213, but lacks the plastic slides on the top and bottom that hold the filter in place.