Послепродажное обслуживание
Он-лайн служба технической поддержки
Происхождение товара
Guangdong, China
airflow
50 cubic meter /(m, h) for 1 meter at 2 pa pressure differential
wind tightness
1.22 cubic meter /(m, h)
resistance wind load
1600 pa
heat preservation
2.9w /square meter /k
noise insulation in open position
20.5 dB(A)
noise insulation in closed position
29 dB(A)