-Air volume stability

The core has high efficiency of moisture permeability and very low moisture absorption rate, so it has wide temperature adaptability (-30℃~60°C) and good stability. Therefore, the fresh air equipment has stable air volume and low noise in the use process.

-Air tightness

The difference between polymer membrane core and paper core is that the polymer membrane has the characteristics of water per meability and airtight, and the air tightness more than 98%, which is much higher than that of the paper core. The test data result polymer membrane has a high repeatability and reproducibility.