%0 Journal Article %T THE INFLUENCE OF REFRIGERANT ON THE PERFORMANCE CHARACTERISTICS OF AN AIR HEAT PUMP IN AIR HANDLING UNITS %A Petrov, M.M. %K ventilation, air handling units, air heat pump, refrigerant %J Bulletin of Belgorod State Technological University named after. V. G. Shukhov %D 2026 %N 11 %P 11 %I Belgorod State Technological University named after V.G. Shukhov