久久精品国产欧美一区二区_国产精品美女一级a毛片久久_在线国产一区二区三区_日本欧美国产区五_高清无码天堂AV_久久久www自慰喷水_国产精品无码av在线_全免费大A级毛片免费看_麻豆国产高清在线播放_igo爱豆传媒为生活加点料

Medium sized ceiling heat recovery fresh air fan

● Detachable frame type: inner and outer layers are made of high-quality color steel plates, with humanized design and beautiful appearance.

● Full heat exchange core: high efficiency and energy saving, energy recovery rate is better than the national standard.

● Twist-type door buckle: easy maintenance.

● Branded fan: low noise, energy saving, high efficiency and stability.

Scope of application

● Large and medium-sized conference rooms, office buildings, hotel rooms, medical inpatient buildings, and swimming pools.

● Laboratories, computer rooms, mushroom cultivation farms, chess and card rooms, restaurants, shopping malls, and entertainment venues.

● Other places where fresh air is needed.