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Tempstar N92ESN furnace: filter size

Tempstar N92ESN filter sizes: 14 x 25 x 3/4, 16 x 25 x 3/4, 16 x 25 x 4-5/16, 20 x 25 x 3/4 and 24 x 25 x 3/4, as listed in the Tempstar 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:

Filter sizes by cabinet / model

Sizes found in the source table
14 x 25 x 3/4
16 x 25 x 3/4
16 x 25 x 4-5/16
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.

Buy

Match the size or part number printed on your current filter.

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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

Where this data came from

Manufacturer document for Tempstar N92ESN
Last checked 2026-10-27. Manufacturers revise documents. If your unit's label disagrees, trust the label.

Excerpt from the source

See Table 8 for filter size details.
                                                                  Table 8 – Air Filter Selection and Duct Sizing - In. (mm)
                                                                                                             FILTER SIZE
         FURNACE CASING WIDTH*                                                                                                                                                         FILTER TYPE†
                                                                                  SIDE RETURN                               BOTTOM 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)

FAQ

What size filter does the Tempstar N92ESN use?

Tempstar N92ESN filter sizes: 14 x 25 x 3/4, 16 x 25 x 3/4, 16 x 25 x 4-5/16, 20 x 25 x 3/4 and 24 x 25 x 3/4, as listed in the Tempstar 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. 14 x 25 x 3/4; 16 x 25 x 3/4; 16 x 25 x 4-5/16; 20 x 25 x 3/4; 24 x 25 x 3/4.

How often should I replace the Tempstar N92ESN 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 Tempstar N92ESN filter?

Sizes found in the source table, by thickness: 3/4 in.: 14 x 25 x 3/4, 16 x 25 x 3/4, 20 x 25 x 3/4, 24 x 25 x 3/4; 4-5/16 in.: 16 x 25 x 4-5/16. Pending human review; check the excerpt.

Where does this information come from?

Manufacturer document for Tempstar N92ESN (https://www.shareddocs.com/hvac/docs/1011/Public/05/N92ESN-03SI.pdf), last checked 2026-10-27.