A method and system to arrange combustion air for a combustion engine or cooling air for an electric motor that are situated in warm indoor space. A started combustion engine or a combustion engine to be started or the air intake equipment of an electric motor has in immediate closeness at least one air intake box where there is connected or will be connected an air channel that reaches the outdoor space and then the outdoor air flows through the air channel to the air intake box and further to the engine air intake equipment. The aspects of the disclosed embodiments are used in the air intake of the lorries, trailer trucks and busses and also power tools and the cooling air of the electric motors.