FENGLU window & door system

Classification selection

detail

product performance

Wind pressure resistance	Grade 9 p₃≥5.0
Air tightness	Grade 6 1.5 ≥ q₁>1.0
Water tightness	Grade 6 △p≥700
Sound insulation	Grade 3 30 ≤ Rw+Ctr ＜ 35
Heat insulation	Grade 4 3.5 ＞ k ≥ 3.0