Door assembly includes the 137980A test button and foam gasket. Assembled and ready to use.
All F300 F50F F58F have either a 16" or a 20" door. Each size door was made in 3 styles. The three styles are interchangeable. At right are buttons for the other two styles.
F300E models manufactured from 2000 to 2005 had the plastic door (32004876-004). Since 2005 the F300 series have a steel door. This current steel door is the same as the F50F door (203306AB) except the paint color is now gray.
This door also fits the media air cleaners F25F F35F F100F F200E (12½x20 20x20 20x25). This door fits the commercial F58F1000. Fits the following highlighted models:
| 12½ x 20 | 16 x 20 | 16 x 25 | 20 x 20 | 20 x 25 |
| F300A2012 | F300E1001 | F300E1019 | F300E1027 | F300E1035 |
| F300B2012 | F300A1620 | F300A1625 | F300A2020 | F300A2025 |
| F50F1040 | F50F1149 | F50F1073 | F50F1032 | F50F1065 |
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