Thermal+chimneys

Solar chimneys are passive solar collectors attached to the highest point on the greenhouse and are combined with vents or openings on either end of the greenhouse. The chimney has an inlet that draws warm air from inside the greenhouse and an outlet that discharges it to the outdoors. To enhance solar gain inside the chimney and increase airflow, the inner surface of the chimney stack is glazed or painted black. A ventilator turbine added to the top of the chimney provides an additional force to pull warm air up from inside the greenhouse.( [|40] )