Air Conditioner & Mini-Split Washable Metal Mesh Filter in 304 Stainless Steel (AISI 304 (1.4301)) is used for catching dust, lint and pet hair ahead of the evaporator coil in window units, mini-split heads, PTACs and fan coils with a washable aluminum or stainless mesh screen. The alloy gives good general corrosion resistance in atmosphere and fresh water and is essentially non-magnetic (annealed), with a practical service limit of approx. +450 °C continuous.
Alloy Properties
| Grade designation | AISI 304 (1.4301) |
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| Magnetic response | Essentially non-magnetic (annealed) |
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| Service temperature | approx. +450 °C continuous |
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| Corrosion characteristic | Good general corrosion resistance in atmosphere and fresh water |
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Specifications of Air Conditioner & Mini-Split Washable Metal Mesh Filter Available in 304 Stainless Steel
| Mesh count | Wire diameter (mm) | Aperture (mm) | Micron rating (u00b5m) | Open area (%) | Alloy |
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| 30-Mesh | 0.180 | 0.667 | 667 | 62.0 | Aluminum 5052 |
| 40-Mesh | 0.180 | 0.455 | 455 | 51.0 | Aluminum 5052 |
| 40-Mesh SS | 0.150 | 0.485 | 485 | 58.3 | SS304 |
| 60-Mesh SS | 0.120 | 0.303 | 303 | 51.3 | SS304 |
Where 304 Stainless Steel Air Conditioner & Mini-Split Washable Metal Mesh Filter Is Used
- Mini-split & window AC OEMs: metal alternatives to nylon pre-filters.
- HVAC service companies: durable replacement filters for cracked plastic originals.
- Hotels (PTAC units): washable filters that housekeeping can rinse.
- Fan coil & cassette units: return-air pre-filters.
Ordering Air Conditioner & Mini-Split Washable Metal Mesh Filter in 304 Stainless Steel
- Mesh: 30–40 mesh aluminum for airflow; 60-mesh stainless for pet hair and fine lint.
- Frame: Snap-in frame matched to the indoor-unit slots.
- Corrosion: SS304 for coastal homes, where aluminum pits.
Mistakes to Avoid with Air Conditioner & Mini-Split Washable Metal Mesh Filter
- Running the unit without a filter, which fouls the coil and blower.
- Fitting a finer mesh than needed, which cuts airflow and capacity.
