Home › Furnace filters › 58MEC
Carrier 58MEC filter sizes: 16 x 25 x 3/4, 20 x 25 x 3/4 and 24 x 25 x 3/4, as listed in the Carrier source document's filter table. Which size fits depends on your cabinet and return. This page is pending human review, so check the source excerpt below.
Auto-extracted · review pending Filter sizes auto-extracted from the manufacturer document.
Last checked against the manufacturer document:
| Sizes found in the source table |
|---|
| 16 x 25 x 3/4 |
| 20 x 25 x 3/4 |
| 24 x 25 x 3/4 |
Extracted by script from the linked document. Read the excerpt to see which size applies to which cabinet or return.
General guidance (not from this manual): check monthly and replace 1-in. filters every 1–3 months, or follow the filter maker's guidance and your owner's manual.
Pull the old filter and read the size printed on its frame. Nominal sizes are rounded up: a 15.5 x 24.5 in. filter is sold as 16 x 25.
Your furnace manual lists the filter's dimensions, not its MERV rating. Higher-MERV filters restrict more air. Manufacturers such as Carrier recommend keeping the clean-filter pressure drop under 0.2 in. w.c. (ideally under 0.1). Lennox warns that an over-restrictive filter can trip the high limit in winter and freeze the coil in summer. If you want MERV 11–13, a 4-in. media cabinet is the usual route. Ask an HVAC tech to check static pressure. Nominal sizes are rounded: a filter labeled 16 x 25 x 1 actually measures about 15.5 x 24.5 x 0.75.
Manufacturer document for Carrier 58MEC
Last checked 2026-11-05. Manufacturers revise documents. If your unit's label disagrees, trust the label.
If installing the filter in the furnace blower compartment,
determine location for filter and relocate filter retaining wire if
necessary. See Table 4 to determine correct filter size for desired
filter location. Table 4 indicates filter size, location, and quantity
shipped with this furnace. See Fig. 2 for location and size of
bottom and side return-air openings.
Table 4 – Filter Information
AIR FILTER LOCATED IN BLOWER COMPARTMENT
FURNACE FILTER SIZE --- IN (mm)
CASING FILTER
WIDTH TYPE
IN (mm) Side Return†* Bottom Return*
17–1/2 (1) 16 X 25 X 3/4 (1) 16 X 25 X 3/4 Washable
(445) (406 X 635 X 19) (406 X 635 X 19)
21 (533) (1) 16 X 25 X 3/4 1) 20 X 25 X 3/4 Washable
(406 X 635 X 19) (508 X 635 X 19)
24–1/2 (1 or 2)16 X 25 X 3/4 (1) 24 X 25 X 3/4 WASHABLE
Washable
(622) (406 X 635 X 19) (610 X 635 X 19) FILTER
* Factory-provided with the furnace. Filters may be field modified by cutting
filter material and support rods (3) in filters. Alternate sizes and additional
filters may be ordered from your distributor or dealer.
† Upflow only. Alternate sizes and additional filters may be ordered from
your dealer.Carrier 58MEC filter sizes: 16 x 25 x 3/4, 20 x 25 x 3/4 and 24 x 25 x 3/4, as listed in the Carrier source document's filter table. Which size fits depends on your cabinet and return. This page is pending human review, so check the source excerpt below. 16 x 25 x 3/4; 20 x 25 x 3/4; 24 x 25 x 3/4.
General guidance (not from this manual): check monthly and replace 1-in. filters every 1–3 months, or follow the filter maker's guidance and your owner's manual.
Filter sizes are nominal (rounded). A filter sold as 16 x 25 x 1 actually measures about 15.5 x 24.5 x 0.75 in. Buy by the nominal size printed on the frame.
Every size found in the source table is 3/4 in. thick: 16 x 25 x 3/4, 20 x 25 x 3/4 and 24 x 25 x 3/4. Pending human review; check the excerpt.
Manufacturer document for Carrier 58MEC (https://www.shareddocs.com/hvac/docs/1009/Public/0A/58MEC-02SI.pdf), last checked 2026-11-05.