... for high humidity greenhouses. With FLC circulation fans, it can help reduce humidity, increase air circulation, reduce insect and pest, improve ... two options, one is single speed, one is variable speed circulation. Product description Stainless steel casing, big air flowing, long ... 110V 50HZ 45-100W 780-1320r/min2820 - 5200m3/hFLC Circulation fan variable speed ZLFJ500T 220V/110V 50HZ 45-100W ...