FIELD: agriculture. SUBSTANCE: apparatus has supplying and discharge pipelines, three-way mixing valves, counting unit, control units, required temperature setter, outer and inner air and heat-carrier temperature sensors. Greenhouse is divided into heating zones with heating systems provided with air and heat-carrier temperature sensors. Counting unit is connected to input of each control unit maintaining heat-carrier temperature of heating system in each heating zone. Control units positioned in front of mixing valves are adapted for regulating pressure differential between two supplying pipelines and between second supplying and discharge pipelines. Pressure differential control units are provided with individual control units and pressure sensors in supplying pipelines and further provided with by-pass pumps and two regulating valves with independent control units, whose inputs are connected with outputs of pressure sensors in supplying and discharge pipelines. It allows separate controlling of heating systems to be provided in each heating zone depending on current parameters of ambient medium. EFFECT: increased efficiency by improved uniformity of temperature distribution over the whole area of greenhouse. 1 dwg
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