Sourced from manufacturer manuals

Find the exact filter your furnace or fridge takes.

Every size on Filter Size Finder comes from the manufacturer's own manual or spec sheet, and we link the document so you can check it yourself. No guessing.

Furnace filters (12 models)Fridge filters (5)

✓ Source document on every page✓ Nominal vs. actual sizes explained✓ Chip-locked fridge filters flagged

How it works

STEP 1Find your modelRead the model number on your furnace or fridge label, then pick its series here.

STEP 2Check the manual's sizeSee the filter size or part number from the manufacturer's table, with a link to the PDF.

STEP 3Buy the right oneMatch the size on your old filter and order a replacement.

Residential gas furnace with new pleated air filters

Furnace filter sizes
By cabinet width and return location

Refrigerator water dispenser in a bright kitchen

Fridge water filters
Part numbers and chip-lock notes

Measuring an air filter with a tape measure

How we source sizes
Manuals only. Never guessed.

Recently checked

Carrier 59SC6A gas furnace
Source: Installation Instructions 59SC6A-01SI, Table 9 – Air Filter Selection

Carrier 59TP6C gas furnace
Source: Installation Instructions 59TP6C-01SI, Tables 9 and 10

Carrier 59TP7A gas furnace
Source: Installation Instructions 59TP7A-01SI, Tables 9 and 10

Carrier 59MN7B modulating gas furnace
Source: Installation Instructions 59MN7B-02SI, filter sizing tables

Lennox SL297NV gas furnace
Source: SL297NV Installation Manual, Table 1 – recommended filter sizes

TM9E series 95% gas furnace (Johnson Controls)
Source: TM9E Installation Manual, Table 3 – Recommended Filter Sizes (High Vel