Size page
16x20x5 air filter: actual size, MERV, and price
A 16x20x5 is a five-inch-class media filter for a dedicated cabinet — not a 1-inch return slot. Buy the printed size 16x20x5. Do not substitute a 16x20x1. Do not substitute a 16x20x4 by title alone. Most 16x20x5 Honeywell-replacement SKUs are about 4⅜ inches thick; that is the same cartridge depth as a Honeywell FC100/FC200 16x20 media pack, which Honeywell still often labels 16x20x4. Measure the old cartridge.
Same panel, swapped axes: 20x16x5. We treat 16x20x5 as the canonical label. Order 16x20x5. Nordic Pure’s live 16x20x4 copy tells Honeywell 4⅜-inch buyers to order their 16x20x5 Honeywell replacement (published 15.88 × 19.75 × 4.38 on that note). A Nordic Pure 16x20x4 (~3⅝ inch actual depth) will sit short in that cabinet.
Actual size by brand
These numbers are copied from manufacturer or merchant product copy, not from a competitor size chart. Thickness is the fit: a Honeywell F100/F200 cabinet takes a ~4⅜ inch cartridge. Nordic Pure’s own 16x20x5 specs and Honeywell-fill note do not print the same face length — compare them to the old filter, not to the nominal 16x20x5 stamp.
| Brand | Nominal | Published actual (in.) | Source |
|---|---|---|---|
| Honeywell FC200E1003 (F200 / F100 media cabinet, MERV 13) | 16x20x5 (Honeywell Store still prints 16x20x4) | 15.875 × 19.875 × 4.375 (15⅞ × 19⅞ × 4⅜) | Air Quality Honeywell Store product copy (“Exact Dimensions: 15 7/8 x 19 7/8 x 4 3/8”); Atomic Filters FC200E1003 listing (nominal 16x20x5, same actual) |
| Honeywell FC100A1003 (F100 / F200 / F150 media cabinet, MERV 11) | 16x20x4 (OEM label; same ~4⅜ in. cabinet as 16x20x5 replacements) | 15.875 × 19.875 × 4.375 (15⅞ × 19⅞ × 4⅜) | Air Quality Honeywell Store product copy (“Exact Dimensions: 15 7/8 x 19 7/8 x 4 3/8”) |
| Nordic Pure 16x20x5 Honeywell/Lennox replacement (HM8 / HM12 / HM13) | 16x20x5 | Specs: approximately 15.88 × 19.63 × 4.38 (15⅞ × 19⅝ × 4⅜). Same listings’ Honeywell-fill note: 15.88 × 19.75 × 4.38 | JB Tools specs tables for 16x20x5HM8-1, 16x20x5HM8-4, 16x20x5HM12-2, 16x20x5HM13-1, 16x20x5HM13-4; Amazon B0G3BDJCJ2 title “15 7/8 x 19 5/8 x 4 3/8 (15.88 x 19.63 x 4.38)”. Honeywell-fill sentence on the JB Tools 16x20x5 and 16x20x4 pages prints 15.88 × 19.75 × 4.38 |
| Filterbuy 16x20x5 Honeywell FC100A1003 / Lennox X0592 replacement | 16x20x5 | 15.75 × 19.75 × 4.38 | Amazon B00NVF4Q3S title and “actual size”; Target A-1007574199 product copy |
| AIRx Filters 16x20x5 Honeywell FC100A1003 replacement (MERV 11) | 16x20x5 | 15.75 × 19.5 × 4.375 | Amazon B0718YFRMT title and product dimensions |
| AIRx ALLERGY 16x20x5 Honeywell FC100A1003 replacement (MERV 11) | 16x20x5 | 15.875 × 19.875 × 4.375 (15⅞ × 19⅞ × 4⅜) | FilterOutlet 16x20x5HW-ALLERGY product specs |
If the old cartridge is about 4⅜ inches thick, this is the size Nordic Pure tells Honeywell 16x20x4 buyers to order. If the old cartridge is about 3⅝ inches thick, that is a different 16x20x4 cut — not this 16x20x5 Honeywell replacement. Filtrete has no 16x20x5 SKU we could find (16x25x5 and other 5-inch Filtrete pages exist). Aprilaire has no 16x20x5 listing (their media cabinets use other face sizes). Amazon Basics has no 16x20x5 SKU with a printed actual. Measure the old filter. Full method: how to measure.
MERV 8 vs 11 vs 13 (facts only)
MERV is ASHRAE 52.2, as summarized by EPA. Higher MERV captures a larger share of smaller particles. It also adds resistance. EPA says to pick at least MERV 13 or as high a rating as your system fan and filter slot can accommodate, and to ask an HVAC technician if you are unsure. A 5-inch-class MERV 13 is not HEPA. We do not claim health outcomes.
| MERV | EPA average capture efficiency (particle size) | Typical 16x20x5 use |
|---|---|---|
| 8 | ≥20% of 1.0–3.0 µm; ≥70% of 3.0–10.0 µm | Common pleated Honeywell-cabinet replacement when the manual does not call for higher |
| 11 | ≥20% of 0.30–1.0 µm; ≥65% of 1.0–3.0 µm; ≥85% of 3.0–10.0 µm | OEM Honeywell FC100A1003 media-cabinet cartridge is labeled MERV 11 (sold as 16x20x4); AIRx 16x20x5 replacements are labeled MERV 11 |
| 13 | ≥50% of 0.30–1.0 µm; ≥85% of 1.0–3.0 µm; ≥90% of 3.0–10.0 µm | OEM Honeywell FC200E1003 and Nordic Pure HM13. Confirm the air handler can take the extra pressure drop. Not HEPA |
Source: U.S. EPA, “What is a MERV rating?”, last updated 14 Jan 2026. Nordic Pure 16x20x5HM12 is labeled MERV 12 — between the EPA 11 and 13 rows above; EPA also publishes a MERV 12 line (≥35% of 0.30–1.0 µm; ≥80% of 1.0–3.0 µm; ≥90% of 3.0–10.0 µm). We do not invent capture numbers beyond that table.
Pack prices checked 30 Aug 2026
These are public shelf/cart prices we recorded on 30 Aug 2026. They are not live. Shipping, subscribe-and-save, and store-only deals will move them. Per-filter math is pack price ÷ count, rounded to the cent.
| Listing | MERV | Pack | Price that day | Per filter | Merchant |
|---|---|---|---|---|---|
| Nordic Pure 16x20x5 Honeywell/Lennox replacement (reseller) | 8 | 4 | $85.10 | $21.28 | JB Tools |
| Nordic Pure 16x20x5 Honeywell/Lennox replacement (reseller) | 8 | 2 | $52.19 | $26.10 | JB Tools |
| Filterbuy 16x20x5 Honeywell FC100A1003 replacement | 8 | 2 | $59.98 | $29.99 | Amazon |
| Nordic Pure 16x20x5 Honeywell/Lennox replacement (reseller) | 12 | 4 | $86.01 | $21.50 | JB Tools |
| Nordic Pure 16x20x5 Honeywell/Lennox replacement (reseller) | 12 | 2 | $53.09 | $26.55 | JB Tools |
| Nordic Pure 16x20x5 Honeywell/Lennox replacement | 12 | 1 | $36.99 | $36.99 | Amazon |
| AIRx 16x20x5 Honeywell FC100A1003 replacement | 11 | 2 | $68.74 | $34.37 | Amazon |
| Nordic Pure 16x20x5 Honeywell/Lennox replacement (reseller) | 13 | 4 | $142.41 | $35.60 | JB Tools |
| Nordic Pure 16x20x5 Honeywell/Lennox replacement (reseller) | 13 | 2 | $74.69 | $37.35 | JB Tools |
Observed range that day for 16x20x5 Honeywell-replacement pleats: about $21.28–$26.10/filter at MERV 8 in Nordic Pure multi-packs, $29.99 at MERV 8 for the Filterbuy 2-pack, $34.37 at MERV 11 for the AIRx 2-pack, $21.50–$26.55 at MERV 12 in Nordic Pure multi-packs ($36.99 for the Amazon MERV 12 single), $35.60–$37.35 at MERV 13 in Nordic Pure multi-packs. Honeywell FC200E1003 OEM media was $94.50 as a single on Air Quality Honeywell Store (that page still prints nominal 16x20x4); Atomic Filters’ FC200E1003 16x20x5 page listed $73.95 sold out, so that pack price is omitted. Target Filterbuy 16x20x5 pages (A-1007574199 and siblings) loaded without a public cart price; Home Depot had no 16x20x5 Honeywell listing we could use (16x20x4 BestAir HW1620-8R and Honeywell Home CF200D1620 exist instead). Filtrete, Aprilaire, and Amazon Basics have no 16x20x5 SKU with a printed actual. FilterOutlet AIRx ALLERGY 2-pack printed actuals and a $129.15 pack price; that row is omitted from the table because the Amazon AIRx 2-pack already covers MERV 11 at a public featured offer. Walmart product pages were not used for a price row.
Where to buy
We may earn a commission if you buy through links on this page. It does not change the price you pay.
- Honeywell Store OEM FC200E1003 media, exact 15⅞ × 19⅞ × 4⅜, MERV 13 (page prints nominal 16x20x4): FC200E1003 16x20. Honeywell Home’s current CF200A1620 is a 16x20x4 listing, not this 16x20x5 SKU.
- Amazon Nordic Pure MERV 12 1-pack with printed actual 15⅞ × 19⅝ × 4⅜: B0G3BDJCJ2. Filterbuy MERV 8 2-pack with printed actual 15.75 × 19.75 × 4.38: B00NVF4Q3S. AIRx MERV 11 2-pack with printed actual 15.75 × 19.5 × 4.375: B0718YFRMT. Search this size: 16x20x5 furnace filter.
- Target Filterbuy 16x20x5 MERV 13 1-pack (printed actual 15.75 × 19.75 × 4.38; no public cart price in our fetch): Target A-1007574199. No Filtrete 16x20x5 listing on Target that day.
- Walmart Size search: 16x20x5 air filter.
- Home Depot Size search (no 16x20x5 Honeywell SKU in our fetch; 16x20x4 Honeywell-cabinet pages exist instead): 16x20x5 air filter.
- AirFilters.com Custom and stock cuts: airfilters.com.
- Nordic Pure Reseller listing with published actual ~15.88 × 19.63 × 4.38 and Honeywell-fill note 15.88 × 19.75 × 4.38: JB Tools 16x20x5HM13-4.
No ranking. Stock and price change. If the slot is an odd fraction that none of these actual sizes match, measure first — that is not a 16x20x5 SKU. A 16x20x1 or a 16x20x4 is not a substitute by name alone.
Sources (accessed 30 Aug 2026)
- EPA MERV table: epa.gov/indoor-air-quality-iaq/what-merv-rating (updated 14 Jan 2026)
- Air Quality Honeywell Store FC200E1003 ($94.50, exact 15⅞×19⅞×4⅜; nominal printed 16x20x4); FC100A1003 exact 15⅞×19⅞×4⅜
- Atomic Filters FC200E1003 (nominal 16x20x5, actual 15⅞×19⅞×4⅜; $73.95 sold out)
- JB Tools Nordic Pure 16x20x5HM8-4 ($85.10), 16x20x5HM8-2 ($52.19), 16x20x5HM12-4 ($86.01), 16x20x5HM12-2 ($53.09), 16x20x5HM13-4 ($142.41), 16x20x5HM13-2 ($74.69) — specs ~15.88×19.63×4.38; Honeywell-fill note 15.88×19.75×4.38
- JB Tools Nordic Pure 16x20x4M7-1: live copy tells 4⅜-inch Honeywell 16x20x4 buyers to order 16x20x5 (15.88×19.75×4.38)
- Amazon Nordic Pure B0G3BDJCJ2 MERV 12 1-pack $36.99 (15.88×19.63×4.38); Filterbuy B00NVF4Q3S MERV 8 2-pack $59.98 (15.75×19.75×4.38); AIRx B0718YFRMT MERV 11 2-pack $68.74 (15.75×19.5×4.375)
- Target A-1007574199 Filterbuy 16x20x5 (printed actual 15.75×19.75×4.38; no public cart price in the fetch)
- FilterOutlet 16x20x5HW-ALLERGY actual 15⅞×19⅞×4⅜