Hitachi MU05611 Air Filter: CP-X450 CP-X206 CP-X201 CP-WX410 CP-X31 HCP-90X CP-X32 HCP-900X

MU05611 is the OEM air filter model used with Hitachi projectors and covers 19 models. This article presents the filter specifications, replacement criteria, model compatibility list, and pre-replacement checks all in one place.

I. Air Filter Specifications

The compatible lamp module model DT00911 refers to the OEM lamp module used with the same projector models as this filter. It is intended for cross-checking the projector generation, not for arbitrary pairing.

These specifications are taken from the Zorsika product database. Confirm dimensions and clip design against the actual item and 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 sound and are usually discovered incidentally. The filter should be inspected if any of the following signs appears:

• The image is noticeably dimmer or the colors look muted: Blocked intake airflow raises the internal temperature, causing the projector to reduce its power automatically to protect itself, which looks like a drop in brightness.
• The projector frequently displays temperature or filter warnings: Most models have a filter timer, and a message appears as soon as it expires. Even without a warning, a fan that continuously runs at high speed or produces more noise usually indicates an obstructed airflow path.
• The filter appears black or blocks light: When removed and held up to the light, it transmits noticeably less light or has clumps on its surface. If cleaning cannot restore it, it should be replaced.

Cleaning Guidelines

Light dust buildup can be cleaned off: first remove loose dust with a soft-bristled brush or low-pressure air blower, then backflush it with clean water from the outlet side, and let it air-dry completely until it no longer drips before reinstalling. Observe three precautions—do not scrub the filter media forcefully, do not use cleaning agents, and never reinstall it while wet. Once the filter media has been loosened or torn during washing, the enlarged pores make it effectively useless, allowing dust to enter the optical path directly.

The environment determines the frequency. In dusty locations such as classrooms, construction sites, and roadside showrooms, inspection intervals should be significantly shorter; they can be extended in temperature- and humidity-controlled meeting rooms. Rather than following a fixed schedule, check the light transmission each time the filter is cleaned, as the actual condition provides a more reliable basis for judgment.

III. Compatible Projector Models (19 Models, Hitachi)

The following Hitachi projector models have been verified as compatible with MU05611:

CP-X450, CP-X206, CP-X201, CP-WX410, CP-X31, HCP-90X, CP-X32, HCP-900X, HCP-960X, HCP-6680X, HCP-6780X, ED-X33, ED-X31, CP-X450J, CP-X33, CP-X401, CP-X467, CP-X301, CP-X306

This is a verified list, not an exhaustive one. Projectors from the same generation often share filters with the same specification. For models not listed, send us photos of the projector nameplate and the original filter for confirmation.

IV. Three Checks Before Replacement

1. Check the model: The OEM part number should match MU05611. Some Hitachi models use the same chassis with different filter configurations, and filters with different part numbers are not interchangeable.
2. Check the dimensions and thickness: A difference of one or two millimeters in length or width may prevent a tight seal. If it is too thick, the cover will not close; if it is too thin, it will allow air leakage. Use the actual original filter as the measurement reference, and do not order solely by model name.
3. Determine whether it is a standalone filter or comes with a frame: Some models use filters with plastic frames or clips, while others use plain filter foam that must be inserted into the existing frame. The wrong format will not fit, so taking a photo during disassembly is the safest way to verify it.

V. Choosing Between Zorsika, OEM, and Other Replacement Filters

Zorsika projector air filters are manufactured to the OEM filter media specifications: pore size, thickness, and air resistance are matched item by item, while dimensions and clips are molded to the OEM design for a tight fit that prevents dust leakage.

The OEM part is the safest choice, but it comes at a higher overall cost and with a delivery time that depends on the supplier. Common problems with low-cost alternatives include uneven pore size and poor corner fit; once installed, they either let dust through or obstruct airflow. If dust enters the optical path, the lamp and LCD panel ultimately bear the consequences.

VI. Frequently Asked Questions

Q: My projector is not in the list of 19 models above. Can I use MU05611?

A: This is a verified model list, not an exhaustive one. Same-generation Hitachi products often share the same filter specification. Send the projector nameplate and a photo of the original filter to the Zorsika technical team, who can confirm whether it is compatible.

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

A: There is no fixed number of months; it depends on the dust concentration in the environment and the number of operating hours. Use the actual condition as the basis for judgment: if noticeably less light passes through, clumps form on the surface, the image becomes dimmer, or the projector displays a filter warning, it should be replaced. Shorter inspection intervals are recommended in dusty locations.

Q: Can the air filter be washed and reused?

A: Light dust buildup can be cleaned off: use a soft-bristled brush or low-pressure air blower to remove loose dust, then backflush it with clean water from the outlet side and let it dry completely before reinstalling. Do not scrub the filter media, do not use cleaning agents, and never reinstall it while wet. If the filter media is already loosened, damaged, or clumped, cleaning cannot restore it, and it must be replaced.

Q: Can the air filter be omitted?

A: No. The filter blocks dust, which can settle on the LCD panel and color wheel once it enters the optical path, causing permanent dark spots and color spots. 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 the OEM filter media specifications, with pore size and air resistance matching the OEM parameters, and every batch undergoes pressure-drop testing before shipment. Compared with OEM products, they offer stable supply and better overall value; compared with other alternatives, they provide assured filtration precision and fit.

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

A: The key to selecting an air filter is balancing filtration precision and air resistance. Zorsika air filters (see the model in the specification table above) use filter media with the same specifications as the OEM, with pore size, thickness, and air resistance matched item by item to ensure both effective dust protection and adequate airflow. Other replacement filters often have uneven pore sizes or poor corner fit; once installed, they either let dust through or obstruct airflow, resulting in greater lamp consumption over time. Choose Zorsika for peace of mind and lower costs.

Related Resources

• Zorsika Technical Support Center
• Projector Brand and Compatible Model Lookup
• Projector Lamp / Lens / Air Filter Product Catalog