How to choose the configuration of the car air conditioning filter--Is the higher the filtration efficiency level, the better?

With the increase of people's consumption awareness, the attention to the air quality in the car has also increased. With the arrival of winter, we often close the windows and turn on the air conditioner when driving. The air quality in the car has become a topic of high concern. Some customers will ask when purchasing car air conditioning filters from us: whether the filtration efficiency can be increased to a higher level and a higher level of filter paper can be used, and they want to use this as a selling point for customers to choose.
Below, I will share a set of actual test results of Henkaes Laboratory for a recent batch of car filter elements, taking a 240*193*35mm filter with filter material H11 as an example:

From the data, we can see:

Resistance: Under different air volumes, the resistance of the air filter increases rapidly with the increase of wind speed.
At 4 times the wind speed, the resistance is 180pa higher than before.
Efficiency: Under the rated air volume, the filter has different filtration efficiency for particles of different particle sizes. The larger the particle size, the higher the filtration efficiency. The filtration efficiency for 0.3um particles can also be ≥95%, and the filtration efficiency for pm2.5, which we usually call, is >99%. It can be said that such filtration efficiency should be sufficient for the in-car environment. If the filter paper grade is increased to H12, the filtration efficiency can reach 99.5%, but the positive force is higher than the original. For the environment where the windows in the car are frequently opened, the editor thinks it is unnecessary to use a very high grade of filter paper. The increase in resistance means that the air output rate will be relatively reduced, which may affect the cooling and heating functions of the air conditioner. If you want a comfortable driving environment, the importance of the car air conditioning filter should pay attention to its daily maintenance. Generally, merchants recommend replacing it 1-2 times a year. We recommend: According to different climatic conditions and driving environments, such as driving in dusty or severe haze areas, the filter replacement frequency may be higher. The selected filter grade does not need to be too high. Under the premise of not affecting the air conditioning function: F7-H11 are better choices.