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The AprilAire 2210 and 2410 are both rated to 2,000 CFM, so neither cabinet is simply the "larger system" option. The real choice comes down to physical fit and static pressure: the 2210 is taller and narrower with more media surface, while the 2410 is shorter and wider. Both belong to the same passive AprilAire whole-house filtration lineup, so the difference is entirely in the sheet metal and the media.
Nominal filter sizes mislead here. The 2210's media is sold as 20 × 25 × 4 inches and the 2410's as 16 × 25 × 4, but those labels describe the rail system, not the duct opening. The 2210 connects to a 21 3/16 by 19 3/4-inch opening; the 2410 connects to a 23 7/8 by 15 7/16-inch opening. Neither is a drop-in for a nominal furnace slot, and AprilAire publishes no tonnage rating for either cabinet. That means the decision starts with a tape measure, not a furnace spec sheet.
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Quick verdict
| AprilAire 2210 | AprilAire 2410 | |
|---|---|---|
| Fits best | Returns with vertical room and a blower near its static limit | Returns where height is tight but width is available |
| Duct opening | 21 3/16 × 19 3/4 in | 23 7/8 × 15 7/16 in |
| Cabinet (W × H × D) | 27 3/8 × 22 1/16 × 6 3/4 in | 30 1/16 × 17 3/4 × 6 3/4 in |
| Filter family | 210 / 213 / 213CBN / 216 | 410 / 413 / 413CBN / 416 |
| Media area | 28 sq ft | 24.5 sq ft |
| Max airflow | 2,000 CFM | 2,000 CFM |
| MERV 13 drop @ 1,200 CFM | 0.15 in. w.c. | 0.17 in. w.c. |
| MERV 13 drop @ 2,000 CFM | 0.31 in. w.c. | 0.37 in. w.c. |
| 2026 successor | U223 | U243 |
Pick the 2210 when you have the height and want the lowest airflow resistance at a given MERV. Pick the 2410 when vertical clearance is the binding constraint and you have width to spare. If both physically fit, the 2210 asks less of your blower.
Which cabinets are we comparing?
Both are passive whole-house media air-cleaner cabinets that install in the HVAC return-air path. Neither has a fan, motor, ionizer, or ozone-generating component. Air moves through them only when the furnace or air handler blower runs, so they filter during heating and cooling cycles rather than continuously on their own.
The 2210 takes AprilAire's 20 × 25 filter family and is the taller, narrower cabinet. The 2410 takes the 16 × 25 family and is the shorter, wider one. AprilAire rates both to a maximum airflow of 2,000 CFM and does not publish separate tonnage ratings for them. The field shorthand of roughly 400 CFM per cooling ton would put 2,000 CFM near the top of a 5-ton system, but that is trade vocabulary rather than a manufacturer specification, and airflow per ton varies by equipment.
Cabinet and media are decoupled. Each cabinet accepts four filter options across three MERV levels, so the model number tells you which filter ships in the box, not what the cabinet can handle. A 2210 can move from MERV 11 to MERV 16 in the same slot without any change to the sheet metal.
Duct opening and cabinet dimensions: 2210 vs 2410
This is the part that decides the purchase, and it is where nominal sizing fails. The 2210's outer cabinet measures 27 3/8 inches wide, 22 1/16 inches tall, and 6 3/4 inches deep. The 2410 measures 30 1/16 inches wide, 17 3/4 inches tall, and the same 6 3/4 inches deep. So the 2410 is shorter by about 4.3 inches, wider by about 2.7 inches, and identical in depth. Neither is meaningfully "deeper" than the other.
The duct connections follow the same pattern. The 2210 presents a 21 3/16-inch-wide by 19 3/4-inch-tall opening, which suits a plenum with more vertical than lateral room. The 2410 presents a 23 7/8-inch-wide by 15 7/16-inch-tall opening, which is the reverse. Because the 2410's opening is wider but shorter, it is not automatically closer to a "16-inch" furnace opening, and the 2210 is not automatically closer to a "20-inch" one. Actual sheet-metal geometry has to be measured, and a proper filter-size check starts at the equipment-side opening rather than the cartridge label.
The practical summary: the 2210 needs vertical room. The 2410 trades height for width. If your return drop is short and wide, the 2410 fits where the 2210 will not; if it is tall and narrow, the reverse is true.
Pressure drop at the same airflow
The comparison that matters is not the headline airflow ceiling, since both cabinets share it. It is the resistance each cabinet adds at the same CFM and the same MERV. AprilAire's published clean-filter curves put the 2210 lower across the range, because it carries more media surface (28 square feet against 24.5).
AprilAire 2210, representative drop in inches of water column:
| Media | MERV | 1,200 CFM | 1,400 CFM | 1,600 CFM | 1,800 CFM | 2,000 CFM |
|---|---|---|---|---|---|---|
| 210 | 11 | 0.11 | 0.13 | 0.16 | 0.19 | 0.22 |
| 213 | 13 | 0.15 | 0.19 | 0.23 | 0.27 | 0.31 |
| 213CBN | 13 + carbon | 0.17 | 0.21 | 0.25 | 0.30 | 0.35 |
| 216 | 16 | 0.23 | 0.29 | 0.36 | — | — |
AprilAire 2410, representative drop in inches of water column:
| Media | MERV | 1,200 CFM | 1,400 CFM | 1,600 CFM | 1,800 CFM | 2,000 CFM |
|---|---|---|---|---|---|---|
| 410 | 11 | 0.12 | 0.15 | 0.19 | 0.22 | 0.27 |
| 413 | 13 | 0.17 | 0.22 | 0.26 | 0.31 | 0.37 |
| 413CBN | 13 + carbon | 0.19 | 0.24 | 0.29 | 0.36 | 0.43 |
| 416 | 16 | 0.24 | 0.31 | — | — | — |
At the balanced MERV 13 level, the gap is 0.15 against 0.17 in. w.c. at 1,200 CFM, and it widens to 0.31 against 0.37 at 2,000 CFM. In other words, the 2410 asks more of the blower the harder the system works. Whether that matters depends entirely on the system's available external static pressure. On a blower with headroom, the difference is small; on a return that is already near its limit, it can be enough to push airflow below the equipment's design point. The MERV 16 media are the densest in each family, which is why AprilAire's current curves for the 216 stop at 1,600 CFM and the 416 at 1,400.
Filter families: what fits each cabinet
The 2210 uses AprilAire's 20 × 25 rail system. Four media fit: the AprilAire 210 at MERV 11, the Check the AprilAire 213 on Amazon at MERV 13, the AprilAire 213CBN at MERV 13 with an activated-carbon layer, and the AprilAire 216 at MERV 16. The 213 ships installed.
The 2410 uses the 16 × 25 rail system and its equivalents: the AprilAire 410 at MERV 11, the Check the AprilAire 413 on Amazon at MERV 13, the AprilAire 413CBN at MERV 13 with carbon, and the AprilAire 416 at MERV 16. The 413 ships installed. The full set of cross-references is covered in the AprilAire 413 filter review and the broader filter cross-reference guide.
Nominal sizes do not describe the physical cartridge. The 213 is labeled 20 × 25 × 4 but measures about 20.6 × 26.63 × 4 inches when expanded. The 413 is labeled 16 × 25 × 4 but measures about 16.52 × 29.38 × 4 inches. The media expands accordion-style against the cabinet rails, which is why a generic cardboard 20 × 25 × 4 or 16 × 25 × 4 filter is not interchangeable with genuine AprilAire media; it will not seal the same way.
Replacement intervals split by media type. The standard MERV 11 and MERV 13 media (210, 213, 410, 413) run up to about 12 months. The carbon and MERV 16 options (213CBN, 216, 413CBN, 416) specify roughly 6 months, because the additional media load shortens service life. Runtime, occupants, carpeting, pets, and outdoor pollution can all pull those intervals shorter.
The 201 and 401 trap
Two legacy filters look like they belong to these cabinets, and neither does.
The AprilAire 201 is a MERV 10 filter for the older AprilAire and Space-Gard 2200 and 2250 cabinets. Its nominal size is 20 × 25 × 6, and it measures roughly 21.06 × 25.19 × 7.38 inches. It is not a 2210 filter, and the extra depth is the reason it will not seat.
The AprilAire 401 is a MERV 10 filter for the legacy 2400 cabinet. It is nominally 16 × 25 × 6 and measures about 17 × 28 × 7.47 inches. It is not a 2410 filter.
Legacy cabinets can be converted rather than replaced. The 1213 upgrade kit moves an appropriate 2200-family cabinet onto the newer 210/213 rail media, and the 1413 kit does the same for a 2400-family cabinet onto the 410/413 family. That conversion changes which filter fits; it does not make the 201 or 401 compatible with a 2210 or 2410. Read the label on the cabinet door before ordering, because "20 × 25" appears on both the 2210 and the 2200 family.
Installation, orientation and service access
Both cabinets are rated for upflow, downflow, and horizontal return configurations, and neither has a fixed inlet or outlet side, so the installer can set the airflow direction. Neither has a hinged media door in the sense of a furnace slot; installation means cutting the return or furnace opening to match the cabinet, mechanically fastening the housing, attaching the return ductwork, and sealing the joints with approved mastic, foil tape, or sealant. Upflow arrangements may need the cabinet supported.
Transition geometry matters where the return or furnace opening differs from the cabinet opening. AprilAire's diagrams call for gradual transitions rather than abrupt reductions, with a maximum of roughly 30 degrees in the horizontal examples and layout-specific limits in the manual. A badly built transition can erase the airflow advantage the larger cabinet was chosen for.
Plan the service access before you commit. You need enough room in front of the door to withdraw the media, and the cabinet adds 6 3/4 inches of depth to the duct run either way. Do not install a media cabinet downstream of a UV lamp, because UV exposure can degrade the filter media. The cabinet itself is heavy-gauge painted or galvanized steel with a 400 lb static load rating, and the documented operating environment runs from about 0 to 140°F at up to 90% relative humidity, non-condensing.
Because the work involves cutting and sealing sheet metal and confirming system static, professional HVAC installation is the safer default. Neither cabinet is a slide-in replacement for a 1-inch furnace filter.
The TriPure transition: U223, U243 and retrofit kits
AprilAire is actively moving this product family from the legacy 4-inch rail media to the new 3-inch TriPure system. The U223 is the stated replacement for the 2210, and it retains the legacy cabinet's published 27 3/8 × 22 1/16 × 6 3/4-inch form factor while switching to the TriPure rail format. The U243 replaces the 2410 and keeps its 30 1/16 × 17 3/4 × 6 3/4-inch footprint.
Existing cabinets do not have to be replaced to follow the change. The UK211 and UK213 retrofit kits convert a legacy 2210-family cabinet to the new 3-inch media, one kit for MERV 11 and one for MERV 13. The UK411 and UK413 kits do the same for the 2410 family. Each is a one-time rail conversion after which replacement media come from the 3F series.
One caution: a bare 3F211 or 3F213 does not automatically fit an unmodified 2210, and the same is true of 3F411 or 3F413 in an unmodified 2410. The upgrade kit and its rails are the compatibility bridge. Legacy 2210 and 2410 cabinets and their 210/213/410/413 media remain available, so this is a planned transition rather than a forced one.
2210 vs 2410 specs compared
| Spec | AprilAire 2210 | AprilAire 2410 |
|---|---|---|
| Type | Passive return-air media cabinet | Passive return-air media cabinet |
| Duct opening (W × H) | 21 3/16 × 19 3/4 in | 23 7/8 × 15 7/16 in |
| Cabinet (W × H × D) | 27 3/8 × 22 1/16 × 6 3/4 in | 30 1/16 × 17 3/4 × 6 3/4 in |
| Nominal filter family | 20 × 25 | 16 × 25 |
| Factory filter | 213 (MERV 13) | 413 (MERV 13) |
| Other media | 210 (MERV 11), 213CBN (MERV 13 + carbon), 216 (MERV 16) | 410 (MERV 11), 413CBN (MERV 13 + carbon), 416 (MERV 16) |
| Media area | 28 sq ft | 24.5 sq ft |
| Max airflow | 2,000 CFM | 2,000 CFM |
| MERV 13 drop @ 1,200 CFM | 0.15 in. w.c. | 0.17 in. w.c. |
| MERV 13 drop @ 2,000 CFM | 0.31 in. w.c. | 0.37 in. w.c. |
| Standard media interval | Up to 12 months | Up to 12 months |
| Carbon / MERV 16 interval | About 6 months | About 6 months |
| Orientations | Upflow, downflow, horizontal | Upflow, downflow, horizontal |
| 2026 successor | U223 | U243 |
Which cabinet should you buy?
Work through four measurements before ordering, because the airflow ratings will not decide it:
- The actual equipment-side opening. Measure the return drop or furnace opening to the nearest eighth of an inch and compare it with the 21 3/16 × 19 3/4-inch (2210) or 23 7/8 × 15 7/16-inch (2410) cabinet opening. Do not trust the nominal filter size.
- Available cabinet height. The 2210 needs about 4.3 inches more vertical clearance than the 2410. If that space is not there, the choice is made for you.
- Available width and front clearance. The 2410 is about 2.7 inches wider, and both need enough room in front of the door to pull the media.
- Allowable external static pressure. This is the metric that settles the airflow question, and it should be measured with the intended media installed, not estimated from the MERV number.
From there, the picks fall into place. If you have the height and want the lower-resistance cabinet, choose the AprilAire 2210. If vertical space is tight but you have width, choose the AprilAire 2410.
For media, match the MERV to the system rather than the marketing. Step down to MERV 11 (210 or 410) when the blower is already near its static ceiling. Use MERV 13 (213 or 413) as the balanced default that AprilAire ships. Move to a carbon variant (213CBN or 413CBN) only when there is a genuine odor or gas need, and to MERV 16 (216 or 416) only when the equipment can carry the extra resistance and the shorter 6-month interval is acceptable. Whichever cabinet wins, it is a supplement to source control and ventilation rather than a replacement for either, which is the same logic that governs portable filtration versus whole-house HVAC filtration.
Conclusion
The AprilAire 2210 and 2410 are not split by system size. Both are documented to 2,000 CFM, and the real split is geometric: the 2210 is taller and narrower, the 2410 is shorter and wider, and both share a 6 3/4-inch depth. When both physically fit, the 2210 is the stronger cabinet because its larger media area (28 sq ft against 24.5) produces a lower pressure drop at the same airflow, and the gap widens toward 2,000 CFM. When vertical clearance rules the 2210 out, the 2410 does the same job in a shorter body with a modestly higher resistance penalty.
Two details save the most money and frustration. First, buy by cabinet model and filter part number, never by nominal size, because the 213 and 413 are far larger than their 20 × 25 × 4 and 16 × 25 × 4 labels suggest. Second, remember that the 201 and 401 belong to the older 2200 and 2400 cabinets and will not fit either current cabinet.
For the wider picture, the AprilAire whole-house filtration guide covers the full cabinet lineup, the AprilAire 413 filter review breaks down the 2410's factory media, and the cross-reference guide handles aftermarket fit. If you are still deciding whether a cabinet is the right investment at all, see how in-duct systems compare with portable units.
