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Carrier 58CU0A filter sizes: 16 x 25 x 3/4 and 20 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 |
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 58CU0A
Last checked 2026-10-30. Manufacturers revise documents. If your unit's label disagrees, trust the label.
and/or property damage. NOTE: If the filter has an airflow direction arrow, the arrow must point
Never store anything on, near, or in contact with the furnace, such as: towards the blower.
1. Spray or aerosol cans, rags, brooms, dust mops, vacuum Table 18 – Filter Size Information (In. / mm)
cleaners, or other cleaning tools. FURNACE FILTER SIZE (In. / mm)
2. Soap powders, bleaches, waxes or other cleaning compounds, CASING
FILTER TYPE
WIDTH Side Return Bottom Return
plastic or plastic containers, gasoline, kerosene, cigarette lighter
In. (mm)
fluid, dry cleaning fluids, or other volatile fluids. 16 X 25 X 3/4 (406 16 X 25 X 3/4
3. Paint thinners and other painting compounds, paper bags, or
17-1/2 (445)
x 635 x 19) (406 x 635 x 19) Washable*
other paper products. 16 x 25 x 3/4 20 X 25 X 3/4
21 (533)
(406 x 635 x 19) (508 x 635 x 19) Washable*
For continuing high performance and to minimize possible equipment *. Recommended
failure, periodic maintenance must be performed on this equipment.
Consult your local dealer about proper frequency of maintenance and the Accessory media cabinet filter procedures:
availability of a maintenance contract. 1. Turn off electrical supply to furnace before removing filter access
Carrier 58CU0A filter sizes: 16 x 25 x 3/4 and 20 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.
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 and 20 x 25 x 3/4. Pending human review; check the excerpt.
Manufacturer document for Carrier 58CU0A (https://www.shareddocs.com/hvac/docs/1009/Public/01/58CU0A-03SI.pdf), last checked 2026-10-30.