– PM2.5 Active Carbon filter
The air you breathe at home matters
51%[1] of people worldwide live in areas where fine particulate PM2.5 pollution surpasses the highest risk limit established by World Health Organization[2]. PM2.5 is now considered the pollution with the largest impact on health globally[3].
At Hitachi, we have developed high performance PM2.5 Active Carbon filter to fight those pollutants and keep your indoor air clean and healthy.
A small particle, a big matter
Why do we call them PM2.5? “PM” means “particulate matter,” and 2.5 refers to their tiny size—particles that are 2.5 micrometers (µm) wide or smaller, so small that they can enter in your lungs. As a reference, average human hair is 70 times wider than a PM2.5 particle!
Short-term exposure to PM2.5 can cause eye, nose, throat, and lung irritation, coughing, sneezing, and shortness of breath. Over time, breathing these particles can lead to serious health issues like lung disease and even reduce life expectancy.
airHome with PM2.5 Active Carbon filter can remove 99% of PM2.5 pollution in the room

airHome range is designed to bring you cleaner, healthier indoor environments. Using The PM2.5 Active Carbon air purifying filter is a powerful tool to improve your indoor air quality. Made with activated carbon material, it gently purifies the air while preserving airHome’s cooling or heating performance.
To demonstrate its effectiveness against PM2.5 particulate pollution, a Hitachi air conditioner equipped with PM2.5 Active Carbon air purifying filters and a Stainless pre-filter was placed in a in 25m3 room[4] .
After 300 minutes of cooling operation, the quantity of PM2.5 particulate matters in the room had decreased by 99%!


In addition to this outstanding PM2.5 removal effect, the PM2.5 Active Carbon air purifying filter has demonstrated a 78% removal of OCs (Volatile Organic Compound) a common source of allergy-like symptoms, along with long-lasting antimicrobial, antiviral, and deodorizing effects(5).
How does the PM2.5 Active Carbon filter work?
Activated carbon is a processed material, made to be extremely porous, resulting in a huge absorption capacity. Fun fact: 1 gram of activated carbon can offer a surface area as large as several tennis courts! As the air flows through, harmful gas molecules, odors, and particles are trapped in the material’s pores and removed from the airstream.
This way, Active Carbon helps remove VOCs emitted by household products, paints, cleaners, and building materials. VOCs can cause irritation, headaches, and other complications.
How to use airHome and PM2.5 Active Carbon filters to purify the air?
Use your airHome equipped with PM2.5 S Active Carbon filters normally. In addition to bringing the perfect temperature, airHome will improve your indoor air quality and reduce the fine particulate matters in your room.
In case you don’t need cooling or heating, you can still turn on your airHome unit in fan mode, to circulate the air and benefit from the Active Carbon filter’s air purifying effects unnoticeably.
For best results, regular maintenance is important: clean the pre-filter periodically – without water – and replace the PM2.5 Active Carbon filter with new one every year to optimize air purification.
Understanding how this air purifying tech will improve your life is crucial. This is why we are committed to developing advanced solutions to preserve your indoor air quality, providing real benefits beyond temperature control. To learn more about our healthy air technologies visit Frostwash and Mold guard pages.
With airHome you’ll have the peace of mind of breathing pure, fresh, and cleaner air in your home.
Take a deep breath. Calmly, comfortable and reassured…
Notes:
Availability may vary per model.
[1]https://www.stateofglobalair.org/air/pm
[2] Interim Target 1 (35 µg/m³), https://www.who.int/publications/i/item/9789240034228
[3] https://www.eea.europa.eu/en/topics/in-depth/air-pollution/eow-it-affects-our-health#:~:text=Fine%20particulate%20matter%20(PM2.5)%20is%20the%20air%20pollutant%20driving,health%20problems%20and%20premature%20mortality.
[4] Test according to setting JEM1467 (The Japan Electrical Manufacturers' Association). Combination of ‘PM2.5 Active Carbon Air Purifying Filter’ and ‘Stainless Clean pre-filter’ on RAS-VJ24CLT. Continuous cooling operation at 25˚C at high fan speed.
[5]The target material, Toluene (C7H8), was observed to have a 78% reduction at Nanopac Korea R&D facility in Seoul by using gas detector tube method under air speed at 0.8 m/s, 27oC/58%(RH). 78% removal of VOCs was observed.