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Carrier 58PHB / 58PHY 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:
| 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.
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 58PHB / 58PHY
Last checked 2026-11-03. Manufacturers revise documents. If your unit's label disagrees, trust the label.
must point towards the blower. 4. Remove two screws from blower access door and remove
blower access door.
Table 14 – Filter Size Information (In. / mm) 5. All factory wires can be left connected, but field thermo-
stat connections may need to be disconnected depending
FURNACE on their length and routing.
FILTER SIZE (In. / mm)
CASING
FILTER TYPE 6. Remove two screws holding blower assembly to blower
WIDTH
In. (mm) Side Return Bottom Return deck and slide blower assembly out of furnace.
14-1/2 16 x 25 x 3/4 14 x 25 x 3/4 7. Clean blower wheel and motor using a vacuum with soft
Washable*
(368) (406 x 635 x 19) (356 x 635 x 19) brush attachment. Blower wheel blades may be cleaned
17-1/2 16 X 25 X 3/4 16 X 25 X 3/4
Washable*
with a small paint or flux brush. Do not remove or disturb
(445) (406 x 635 x 19) (406 x 635 x 19) balance weights (clips) on blower wheel blades.
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* 8. Vacuum any loose dust from blower housing, wheel and
16 x 25 x 3/4 24 X 25 X 3/4 motor.
24 (610) Washable*
(406 x 635 x 19) (610 x 635 x 19) 9. If a greasy residue is present on blower wheel, remove
* Recommended wheel from the blower housing and wash it with an appro-
Media cabinet filter procedures : priate degreaser. To removCarrier 58PHB / 58PHY 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. 14 x 25 x 3/4; 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: 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.
Manufacturer document for Carrier 58PHB / 58PHY (https://www.shareddocs.com/hvac/docs/1009/Public/0C/58PHB-05SI.pdf), last checked 2026-11-03.