Quick Take
Air filters don't come in one universal size, so the first job is matching a replacement to your system's slot. The four filters here cover three different filter sizes and two pack formats. Listed prices run from USD 18.95 to USD 52.99. The two single-inch filters are both pleated options, but at different dimensions. The two Honeywell filters are the same FC100A1037 model in 2-packs, with the open-box version listed below the new version. If you already know your size, the price table is the fastest way to compare; if not, the decision matrix narrows it down by slot.
Price Comparison
| Product | Listed price | Price bar | Size and pack |
|---|---|---|---|
| Air Filter Standard Pleated 14 X 30 X 1 FPR 5 (3-Pack) | USD 18.99 | 14x30x1, 3-pack | |
| HDX 18x18x1 Air Filter MERV 8 Pleated Furnace AC HVAC FPR 5 3-Pack | USD 18.95 | 18x18x1, 3-pack | |
| Honeywell FC100A1037 HVAC Replacement Air Filter 20x25x4 Merv 11- 2 PACK (Open Box) | USD 48.99 | 20x25x4, 2-pack | |
| Honeywell FC100A1037 HVAC Replacement Air Filter 20x25x4 Merv 11 -2 Pack (New) | USD 52.99 | 20x25x4, 2-pack |
Decision Matrix
| If your filter slot is... | Start with this listed option | Why |
|---|---|---|
| 14x30x1 | Standard Pleated | Pleated design in a single-inch format |
| 18x18x1 | HDX Pleated | MERV 8, pleated construction |
| 20x25x4 and you're okay with open box | Honeywell FC100A1037 (lower-priced 2-pack) | Same Honeywell model, open-box condition |
| 20x25x4 and you prefer new | Honeywell FC100A1037 (New) | New condition |
Product Notes
Standard Pleated FPR 5
This three-pack is the FPR 5 dust-replacement filter in the group, listed at USD 18.99. If your system takes the matching single-inch slot, this gives you three filters in one listing and a clear "dust replacement" purpose. The limitation is that no MERV-efficiency rating is listed for this filter; the listed type is dust replacement with FPR 5. That keeps the decision simple, but it's not the choice if you specifically want a published MERV number.
HDX MERV 8 Pleated
This HDX filter is listed at USD 18.95, which is the lowest listed price in the group. It pairs MERV 8 with pleated construction and captures dust mites, pollen, lint, and pet dander. For a furnace or AC slot that matches this listed size, the three-pack gives you three filters with a listed three-month filter life. The trade-off is that the size is dedicated to one HVAC inlet; if your system takes a different slot, this listing won't help.
Honeywell FC100A1037 (Open Box)
This 2-pack is the open-box listing at USD 48.99, which is the lower listed price of the two Honeywell FC100A1037 2-packs. If you're willing to accept an open-box condition, this is the path to the same model name and nominal filter format for less than the new-condition listing. The limitation is condition: it is explicitly listed as open box, not new. For buyers who want a factory-fresh carton, the new-condition Honeywell 2-pack is the alternative.
Honeywell FC100A1037 (New)
This is the new-condition Honeywell FC100A1037 2-pack, listed at USD 52.99. It is listed with a MERV 11 rating, and the filter media is pleated fabric. If your system uses this Honeywell replacement format and you want new-condition filters, this is the option to start with. The limitation is the listed price: it's the highest of the four filters here. You get two filters in the pack, but the price is at the top of the range.
Final Recommendation by Use Case
If your filter slot matches the HDX Pleated option, that's the lowest listed price in the group. If it matches the Standard Pleated FPR 5 option, you get a dust-replacement filter in the single-inch format. For the Honeywell FC100A1037 format, choose the MERV 11 Honeywell if you want new filters, or the Honeywell with the lower listed price if condition matters less. Match the slot first, then let condition and price finish the decision.
