The material is made of heat-resistant frame and anti-fire-resistance ability with the standard UL-94 Vo.

Non-woven anti-dust filter fiber uses a platform and granule 10 which is greater than 10 microns.

Big Powers

The fan is matched with an air filter that is with the insulating layer

Motor, fan, temperature excellent resistance protection (higher).

Easy to change filter using groove plate on shutter indication.

Ventilation rain shutters – Proven ability to combat mechanical damage, can withstand damp coming