1 / 7Simply 20x20x4 MERV 8 Air Filter, 2-Pack
Pack: Simply 20x20x4 MERV 8 Air Filters are a two-filter replacement set with a listed actual size of 19.5 by 19.5 by 3.63 inches. The listed rating and dimensions help buyers compare it with their existing filter, but confirm the slot size and the stated Honeywell incompatibility before ordering.
At a glance
- MERV 8 rating for HVAC replacement use.
- Actual dimensions listed as 19.5 x 19.5 x 3.63 inches, rather than the nominal 20x20x4 size.
- Listing describes pleated construction and says the filters capture dust, mold, pet dander, and pollen.
- Manufacturer recommends replacement at up to 3 months and directs users to follow the airflow arrows.
Reference price: $44.34
Price checked: Nov 14, 2026
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Pros and cons
Pros
- Two filters are listed in the package, making this a replacement set rather than a single filter.
- Listed for air conditioners, furnaces, and heat pumps.
- The listing gives actual dimensions to compare with the existing filter slot.
Technical specifications
12 specifications| Brand | Simply |
|---|---|
| Model | Merv 8 20x20x4 2 pack |
| MERV rating | 8 |
| Compatible systems | Air Conditioner, Furnace, Heat Pump |
| Residential HVAC compatibility | residential |
| Dimensions listed | 19.5"L x 19.5"W x 3.63"Th |
|---|---|
| Weight listed | 3 pounds |
| Shape | Rectangular |
| Material listed | Cardboard, Paper |
|---|---|
| Filter construction | 24-Point Beverage Board, Hot-Rolled Steel Wire Mesh |
| Number of items | 2 |
|---|---|
| Claimed replacement interval | up to 3 months |
What to know before buying
- The listing says the filter works with almost any brand but specifically says it is not compatible with Honeywell. Confirm the fit using the stated actual dimensions, especially if replacing a Honeywell filter. The claimed particle-capture and up-to-three-month lifespan are manufacturer statements, not verified performance results.
What’s in the box
Included- 2 air filters
- Installation guide
Who is it for?
A good fit for
- Households replacing a filter in a compatible HVAC slot measuring for the listed actual dimensions.
- Buyers seeking a two-pack of MERV 8 filters for an air conditioner, furnace, or heat pump.
Less suited to
- Honeywell users, since the listing explicitly says this filter is not compatible with Honeywell.
- Buyers whose required filter dimensions or filtration rating differ from the listed specifications.
Customer reviews on Amazon
- 5 stars
73% 73% - 4 stars
16% 16% - 3 stars
7% 7% - 2 stars
1% 1% - 1 star
3% 3%
Customer feedback highlights perceived effectiveness at filtering dust and allergens and ease of installation. Experiences are mixed on durability and fit, with some reporting filters that last longer while others say they rip during removal or seem smaller than advertised. Some also report limited flexibility or damage on arrival. These concerns matter for a filter whose listed dimensions should match the slot closely, so confirm the size and inspect the filter when it arrives. Aggregate ratings are generally favorable, but do not establish performance or explain individual experiences.
Positive themes
- Customers describe the filters as effective at filtering dust and allergens and easy to install.
Negative themes
- Some customers report limited flexibility and filters arriving damaged.
Mixed feedback
- Reports on durability vary, including both longer use and tearing during removal.
- Customers differ on whether the size fits as expected, with some describing it as smaller than advertised.
Frequently asked questions
What are the listed actual dimensions?
The listing gives the dimensions as 19.5 inches long, 19.5 inches wide, and 3.63 inches thick. Compare these with your current filter and slot before buying.
Which systems is it listed for?
The specifications list air conditioners, furnaces, and heat pumps. The listing also specifically excludes Honeywell compatibility.
How often does the manufacturer recommend replacing it?
The listing claims filtration for up to 3 months. Actual replacement timing may depend on use and conditions, which are not specified here.
Alternative options
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