Duct  reinforcement: Ventilation duct side length ≥ 650mm, length ≥1250mm when  the addition of reinforcement, the use of materials and flange  materials the same.

Anticorrosion: Ordinary  steel plate duct tube before the brush must be anti-rust paint again,  before and after installation inside and outside brush rust paint again. Support, hanger anti-corrosion should be intact. When the duct flange is pressed, it is sprayed with a paint. Anticorrosion should be ≥ 5 ℃, ≤ 80% humidity environment, before construction should be degreasing, rust treatment.

Therefore, the regular maintenance of the duct, the use of your duct and duct life have the effect of longevity!