Air collector OS32 Solar air heater, air ventilator with LCD thermostat: heating air Conditioner Conditioning Exhaust Fan Ventilator Thermal Panel Dehumidifier Heat Pump Ventilation Dehumidification water Attic roof vent gableProduct details: OS32 solar air heater 2 in 1 Function: 1. Heating outdoor fresh air, applicable in Spring, Autumn and Winter; 2. Heating indoor air internal circularly. This mode is the best way to heat the room. Applicable to OS22 32 42. Model No. OS32 Appro room area 60m2 Maximum air volume 113m3 h Time for air change Approximate 2 hours Heating efficiency 74% Sun intensity performance(w h set ) 840W Total Annual Heating Delivered (9months) 740 KWh