Exhaust air chimney for farm buildings HE740

pig barn

The HE740 exhaust fan has outstanding efficiency rating and it is by far the most energy efficient roof mounted exhaust fan available. In a direct comparison against leading suppliers on the market, the HE740 exhaust unit offers at least 30 % lower energy consumption at equivalent flow rates. E.g.: 25.5W/1000 m3/h @ 17,471 m3/h. Two versions - turning baffle or butterfly damper The HE740 exhaust with butterfly damper completely seals off from rain, birds, insects, rodents and light when not in operation. This unit is for on/off operation. The HE740 with turning baffle can be speed controlled via frequency inverter, or via on/off operation. Motors for both HE740 versions are UL/ULc listed and can run on both 50Hz and 60Hz power grid.