Counterpoising Square Pressure Ventilator

CM-1110-R ♣ The function of this ventilator is to keep the inside and outside pressure to be alanceable, even the inside temperature is under 0°C, so as to ensure free open of the door. ♣With a temperature controller inside the window, if the temperature inside the coldroom is below -40°C, which also keep the window's temperature within +20°C 40°C, then guarantee fluent ventilation. ♣ With a stainless steel filtrating net, which prevent the insect from entering. ♣ Groove on the surface, avoid the inleakage of water. ♣ AC 220V or AC 110V are on your option.