Protect your HEPA. Keep airflow strong.
- OEM 3M Filtrete pre‑filter for the XJ‑2 negative‑pressure HEPA unit—part #41144.
- Rated 80–85% ASHRAE efficient to capture larger particles before the HEPA, extending service life.
- Change when the gauge says so: use the XJ‑2’s Minihelic® pressure gauge or noticeable airflow drop to know it’s time.
Best for: hospitals, clinics, pharmacies, labs, and isolation spaces running the XJ‑2 for monitored negative pressure.
The 3M Filtrete prefilter protects the HEPA filter and is 80-85% ASHRAE Efficient
Dirty air passes through the prefilter. The prefilter removes large particulate. The primary filter then captures the remaining particulate. As the contaminant load on the filters increases, the filters become more efficient in capturing the smaller particles. At the same time, however, the dirty filter allows less air to pass through resulting in less particle collection and a decrease in the overall effectiveness of the air cleaner.
The XJ-2 air cleaner is equipped with a pressure gauge which indicates the restriction to airflow caused by the filters loading with particulate. When the air filter gauge reaches the red arrow or a noticeable reduction in airflow occurs, it is time to clean or replace the prefilter and possibly the primary filter. The CDC guidelines specify that the HEPA filter shall be replaced every six months.
n the Box & Installation
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Swap steps (summary): Power OFF → open filter door → remove used pre‑filter → insert 41144 (airflow arrow away from blower) → close door → power ON → note new Minihelic® baseline. (Follow facility policy for handling and disposal.)
FAQs
How often should we replace it?
Use the pressure gauge and airflow as your guide. Replace the pre‑filter when the gauge reaches the marked point or you see reduced airflow. HEPA is typically replaced every ~6 months in healthcare applications per CDC guidance.
Is this washable?
The manual instructs to replace the pre‑filter when loaded; follow your facility’s maintenance policy. (If you intend to clean, confirm method with your infection‑control team.)
Will this fit other AQE models?
This listing is for the XJ‑2 only. See your model’s parts list or contact us to confirm fit.
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