Tractors and self-propelled machines for agriculture and forestry. Operator enclosure environment. Heating, ventilating and air-conditioning test method and performance|Operators (personnel), Testing conditions, Test equipment, Performance, Working conditions (physical), Enclosures, Tractors, Thermal comfort, Forestry equipment, Cabs, Thermal environment systems, Heating, Reports, Air-conditioning systems, Environment (working), Heaters, Agricultural tractors, Performance testing, Agricultural equipment, Ventilation