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Carrier 59TN6C furnace: filter size

Carrier 59TN6C filter sizes: 14 x 25 x 3/4, 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: October 30, 2026

Filter sizes by cabinet / model

Sizes found in the source table
14 x 25 x 3/4
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.

Close-up of a pleated furnace air filter

Illustration only. Not this manufacturer's part.

Replacement interval

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.

Before you buy

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.

MERV notes

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.

Related models

Bryant 926TC furnace same filter table
Tempstar / ICP F96VTN / G96VTN furnace same filter table
Carrier 58SB0B / 58SB1B furnace same filter table
Carrier 58SC0B / 58SC1B furnace same filter table
Carrier 58TN0B / 58TN1B furnace same filter table
Carrier 58TP0B / 58TP1B furnace same filter table

Where this data came from

Manufacturer document for Carrier 59TN6C
Last checked 2026-10-30. Manufacturers revise documents. If your unit's label disagrees, trust the label.

Excerpt from the source

     *. Recommended to maintain air filter face velocity. See Product Data for part number.
       Table 9 – Air Filter Selection and Duct Sizing - In. (mm)
                                       FILTER SIZE
  FURNACE
                             SIDE                   BOTTOM               FILTER TYPE*
CASING WIDTH
                            RETURN                  RETURN
                          16 x 25 x 3/4           14 x 25 x 3/4
  14-3/16 (360)                                                             Washable
                        (406 x 635 x 19)        (356 x 635 x 19)
                          16 x 25 x 3/4           16 x 25 x 3/4
   17-1/2 (445)                                                             Washable
                        (406 x 635 x 19)        (406 x 635 x 19)
                          16 x 25 x 3/4           20 x 25 x 3/4
     21 (533)                                                               Washable
                        (406 x 635 x 19)        (508 x 635 x 19)
                          16 x 25 x 3/4           24 x 25 x 3/4
   24-1/2 (622)                                                             Washable
                        (406 x 635 x 19)        (610 x 635 x 19)
     *. Recommended to maintain air filter face velocity. See Product Data Sheet
        for part number.

FAQ

What size filter does the Carrier 59TN6C use?

How often should I replace the Carrier 59TN6C filter?

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.

Why doesn't my filter measure exactly 16 x 25?

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.

How thick is the Carrier 59TN6C filter?

Every size found in the source table is 3/4 in. thick: 14 x 25 x 3/4, 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.

Where does this information come from?

Manufacturer document for Carrier 59TN6C (https://www.shareddocs.com/hvac/docs/1009/Public/0E/59TN6C-04SI.pdf), last checked 2026-10-30.