Panasonic ET-RFL400 Air Filter, 12 Models: PT-TMZ400C PT-LMW460C PT-TMW380C PT-TMX380C PT-LMZ460C

ET-RFL400 is the OEM air filter model used in Panasonic projectors and is compatible with 12 models. This article presents the filter specifications, replacement criteria, model compatibility list, and pre-replacement checks in one place.

I. Air Filter Specifications

The matching lamp module model ET-LAV300 refers to the OEM lamp module used with the same projector models as this filter. It is provided for cross-checking the projector generation and is not a random pairing.

These specifications are taken from the Zorsika product database. Confirm the dimensions and clip design against the actual item and the OEM part number.

II. When to Replace It and Whether It Can Be Washed

Air filters are consumables, but they do not fail with an obvious warning sign and are usually discovered indirectly. If any of the following signs appears, inspect the filter:

• The image is noticeably dimmer and the colors look dull: A blocked intake raises the internal temperature, causing the projector to automatically reduce its power output as a protective measure. The result appears to be a drop in brightness.
• The projector frequently displays temperature or filter warnings: Most models track filter usage time and display a prompt when it expires. Even without a prompt, a fan that continuously runs at high speed or increased noise generally indicates an obstructed airflow path.
• The filter is blackened and no longer lets light through: Remove it and hold it up to the light. If light transmission has clearly declined or the surface is clogged, cleaning is unlikely to restore its performance, and the filter should be replaced.

Cleaning Guidelines

Light dust buildup can be cleaned: first remove loose dust with a soft brush or low-pressure compressed air, then rinse it in reverse with clean water from the exhaust side. Air-dry it in the shade until it no longer drips at all before reinstalling it. Observe three precautions—do not scrub the filter material, do not use detergents, and do not install it while wet. If the filter material is loosened or torn by washing, enlarged pores make it effectively useless, allowing dust to enter the optical path directly.

The environment determines the replacement frequency. Inspection intervals should be significantly shortened in dusty environments such as classrooms, construction sites, and street-facing showrooms; they can be extended in temperature- and humidity-controlled meeting rooms. Rather than following a fixed schedule, check the filter's light transmission whenever you clean the projector, as its actual condition provides a more reliable guide.

III. Compatible Models (12 Models, Panasonic)

The following compatible projector models for ET-RFL400 have been verified with Panasonic projectors:

PT-TMZ400C, PT-LMW460C, PT-TMW380C, PT-TMX380C, PT-LMZ460C, PT-LMZ425NC, PT-LMX460C, PT-LMW420C, PT-LMX420C, PT-LMW380C, PT-LMX380C, PT-LMZ420

The list contains verified models and does not represent the full range. Projectors from the same generation often share the same filter specification. For an unlisted model, send us a photo of the chassis nameplate and the old filter for confirmation.

IV. Three Checks Before Replacement

1. Verify the model: The OEM part number should match ET-RFL400. Some Panasonic projector models use different filter configurations for the same chassis, and filters with different part numbers are not interchangeable.
2. Check the dimensions and thickness: A difference of just one or two millimeters in length or width will prevent a proper seal. If it is too thick, the cover will not close; if it is too thin, air will leak. Measure the original filter itself rather than ordering solely by the projector model name.
3. Confirm whether it is a standalone filter or includes a frame: Some projector filters have a plastic frame or clips, while others consist solely of filter foam that must be fitted into the original frame. The wrong form will not fit, so taking a photo during disassembly is the safest way to confirm it.

V. Choosing Between Zorsika, OEM, and Other Alternatives

Zorsika projector air filters are manufactured to OEM filter material specifications. Pore size, thickness, and airflow resistance are matched item by item, while dimensions and clips are molded to OEM designs for a secure fit that prevents dust ingress.

OEM parts are the most reliable, but the trade-off is a higher overall cost and lead times that depend on the distribution channel. Common problems with low-cost alternatives include uneven pore sizes and poor fit at the corners. Once installed, they either let dust through or obstruct airflow; dust entering the optical path ultimately makes the lamp and LCD panel bear the consequences.

VI. Frequently Asked Questions

Q: My projector is not among the 12 models listed. Can I use ET-RFL400?

A: The list contains models that have been verified and does not represent the full range. Panasonic products from the same generation often share the same filter specification. Send photos of the chassis nameplate and the old filter to the Zorsika technical team, who can help confirm whether it is compatible.

Q: How often should a projector air filter be replaced?

A: There is no fixed replacement interval in months; it depends on the ambient dust concentration and operating hours. Use the actual condition as the basis for judgment: replace the filter when light transmission has clearly declined, the surface is clogged, the image becomes dimmer, or the projector displays a filter warning. Shorter inspection intervals are recommended in dusty environments.

Q: Can the air filter be washed and reused?

A: Light dust buildup can be cleaned: use a soft brush or low-pressure compressed air to remove loose dust, then rinse it in reverse with clean water from the exhaust side. Reinstall it only after it has dried completely. Do not scrub the filter material, use detergents, or install it while wet. If the filter material is already loosened, damaged, or clogged, cleaning cannot restore it, and it must be replaced.

Q: Can I omit the air filter or install the projector without it?

A: No. The filter blocks dust. Once dust enters the optical path, it can settle on the LCD panel and color wheel, causing permanent dark spots and color defects. Cleaning requires disassembly and costs far more than the filter itself.

Q: Why should I choose a Zorsika air filter instead of a cheaper one?

A: Zorsika air filters are manufactured to OEM filter material specifications, with matching pore size and airflow resistance, and each batch undergoes pressure drop testing before shipment. Compared with OEM parts, they offer stable supply and better overall value; compared with other alternatives, they provide assured filtration precision and fit.

Q: How do I choose between OEM, Zorsika, and other alternatives?

A: The key to an air filter is balancing filtration precision and airflow resistance. The Zorsika air filter (see the model in the specifications table above) uses filter material with the same specifications as the OEM part, matching OEM pore size, thickness, and airflow resistance item by item for both effective dust protection and adequate airflow. Other alternative filters often have uneven pore sizes and poor edge fit, so they either let dust through or obstruct airflow, ultimately using more lamps over time. Choose Zorsika for peace of mind and savings.

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• Zorsika Technical Support Center
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