Honeywell FC100A1037 Furnace Filters, 20x25x4 Air Filter 1,2,3,4,5 Pack with bag Honeywell FC100A1029 Furnace Filters, 16x25x4 Air Filter 1,2,3,4,5 Pack with bag Lennox X6672 Furnace Filters, 16x25x5 Air Filter 1,2,3,4,5 pack with bag Lennox X6675 Furnace Filters, 20x25x5 Air Filter 1,2,3,4,5 pack with bag Honeywell 20x20x4 Air Filter FC100A1011 Furnace Filters 1,2,3,4,5 Pack with Bag Honeywell 16x20x4 Air Filter FC100A1003 Furnace Filters 1,2,3,4,5 Pack with Bag Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.7 out of 5 stars 906 4.8 out of 5 stars 826 4.8 out of 5 stars 230 4.6 out of 5 stars 281 4.7 out of 5 stars 427 4.7 out of 5 stars 426 Price $48.99$48.99 $47.99$47.99 $81.95$81.95 $104.25$104.25 $46.99$46.99 $79.99$79.99 Size 20" x 25" x 4" 16" x 25" x 4" 20" x 25" x 5" 16" x 25" x 5" 20" x 20" x 5" 16" x 20" x 4" Merv Rating Merv 11 Merv 11 Merv 16 Merv 16 Merv 11 Merv 11 Available Packs 1, 2, 3, 4 and 5 1, 2, 3, 4 and 5 1, 2, 3, 4 and 5 1, 2, 3, 4 and 5 1, 2, 3, 4 and 5 1, 2, 3, 4 and 5 Carbon Fiber no data no data ✓ ✓ no data no data