What is the connection between air conditioning and allergies?

No, there is no such thing as a direct allergy to air conditioners. Typical allergic symptoms are not triggered by the unit itself, but by allergens in the indoor air, such as pollen, dust mites, mold spores, or pet dander. If an air conditioner’s filters are dirty, these particles can accumulate in the unit and be circulated throughout the room with the airflow, which can irritate the respiratory tract. However, a modern and well-maintained air conditioner does exactly the opposite, as it can actually significantly reduce the level of allergens in the room. Depending on the filter system, modern units effectively trap allergens and fine dust and purify the indoor air. Mitsubishi Electric offers advanced solutions for this purpose, such as the Plasma Quad Plus and V-Blocking filters. Learn more about filters for air conditioners.

That depends heavily on the filter class. Simple, standard coarse-dust filters usually capture only larger particles such as lint, pet hair, and coarse dust flakes. However, Mitsubishi Electric’s advanced filter systems—such as the Plasma Quad Plus or V-Blocking filters—operate on a microscopic level: They filter and neutralize tiny airborne allergens such as pollen (e.g., from grasses and trees), dust mite droppings, mold spores, and fine particulate matter (PM2.5). Thanks to state-of-the-art coatings and plasma technologies, these special filters can even neutralize even smaller organic contaminants such as bacteria and viruses, thereby demonstrably reducing allergen levels in the room to a minimum.

Yes, an air conditioner can significantly alleviate hay fever symptoms. Not only does it keep the indoor air pleasantly cool, but it also effectively filters out airborne pollen. Especially on days with very high pollen counts, it’s advisable to keep the windows closed and instead use the air conditioning system to filter and regulate the indoor air, in order to keep allergen levels indoors as low as possible.

During pollen season, the filters work at full capacity, which is why they should be cleaned especially regularly during this time and replaced as needed. To minimize the entry of new allergens, it’s also recommended to keep windows closed when pollen counts are high. A practical guide for this is the Pollen Risk Index from the German Weather Service (DWD), which provides daily updates on the expected regional pollen levels.

Only clean filters can fully perform their purifying function and reliably improve indoor air quality. If the filters are not maintained regularly, dust, pollen, and microorganisms will accumulate inside the system. Over time, this can deteriorate air quality and cause symptoms such as a runny nose, cough, watery eyes, or a scratchy throat in sensitive individuals or those with allergies.

The filters should be inspected and cleaned at regular intervals. The exact frequency depends largely on the specific unit, how often it is used, and the general level of dust and pollen in the environment. While simple filter cleaning can often be done on your own, it is recommended that a qualified service provider perform a thorough, hygienic cleaning and maintenance of the entire system.

Yes, indoor air that is too cold or too dry can cause irritation to the eyes, nose, or throat in sensitive individuals. However, Mitsubishi Electric air conditioners are designed to minimize this problem: Thanks to modern inverter technology, they continuously adjust their output and cool the indoor air very gently. In addition, the intelligent airflow technology (3D i-See Sensor in premium models) ensures that the cool airflow is not directed directly at people, thus preventing the mucous membranes from drying out unnecessarily. For an optimal comfort climate, it is recommended to set the room temperature moderately (e.g., a maximum of 5 to 6 degrees Celsius below the outside temperature) and aim for a relative humidity of 40 to 60 percent. Learn more about airflow and air distribution in air conditioners.

The most important factors for people with allergies are a high-performance, properly sized filter system, the ability to clean it easily, and regular, professional maintenance. In addition, the air conditioner must be precisely matched to the size of the room and its intended use. Anyone who suffers from allergies should therefore seek comprehensive advice before making a purchase to determine which combination of unit and filter best meets their individual needs.

Not every air conditioner automatically replaces an air purifier. Whether and to what extent it improves indoor air quality depends primarily on the filter system used. Depending on the filter solution, air conditioners can, for example, reduce allergens, fine dust, mold spores, bacteria, viruses, or odors. Mitsubishi Electric offers various filter solutions for this purpose, such as V-Blocking filters and Plasma Quad Plus filters. You can learn more about this in the article “Air Conditioners with Air Purification.”