FIELD: water and air purification technology. SUBSTANCE: invention can be used to produce water from hot exhaust gases in conditions of arid terrain and absence of mineralized water for its desalination. Exhaust pipe 1 is equipped with ejector 2 and gas sampling tube 3, which are connected to shell-and-tube heat exchanger-condenser 7. Hot air feed pipe 8 of heat exchanger-condenser 7 is connected through control valve to gas sampling tube 3, its outlet pipe of cold atmospheric air is connected through the second control valve to the output of ejector 14, and the branch pipe of atmospheric air inlet 10 through the third control valve is connected to atmosphere. Water is removed from heat exchanger-condenser through additional branch pipe 13 arranged in its lower right part. To increase the efficiency of the device, an additional finned heat exchanger 15 is introduced, buried into ground 17, the inlet branch pipe of which is connected to atmospheric air, and its outlet branch pipe is connected through fourth control valve to atmospheric air inlet branch pipe to heat exchanger-condenser 7, at that, third valve should be closed. EFFECT: disclosed invention provides additional useful application of internal combustion engines and other power units, gas exhaust of which can be used, including for water production.