Very simple maintenance. The pre-filter screen, activated carbon filter screen and HEPA filter screen can be simply taken out from the machine side. The pre-filter screen and activated carbon filter screen shall be replaced every 6 months and HEPA filter screen shall be replaced every12-18 months generally

99.97% filter efficiency
It is proved through the test that HEPA filter efficiency is 99.97% for 0.3UM particles . It consists of very thin and thickly dotted glass microfiber.

Super silent operation
The unique design is that a natural noise shielding system is created on both sides of the motor. Moreover, the sound insulation sponge and rubber gasket are provided in the machine to reduce the noise.

The ventilation and purification system sucks the outdoor oxygen bearing air, sends indoors through 3 layers of filter and makes secondary purification for the indoor reused air anytime and anywhere. The purification rate can be up to 99.97%.