Heaters gas heat capacity of 40, 70 or 90 kW and liquid-fuel thermal power of 40 kW is designed for air heating and ventilation systems on poultry, livestock farms, greenhouses and other structures requiring maintenance of a given temperature and its automatic. Can be operated both in manual and in automatic mode by controlling with a remote control Cabinet (not supplied) or by inclusion in a computerized system of the microclimate of both domestic and foreign production.