Mobile power generation system and methods for air filtration include providing a trailer including a rear end, a front end, a bottom end, and a top end, a gas turbine housed inside the trailer, an electrical generator coupled to the gas turbine to generate electricity and housed inside the trailer, and a plurality of air inlets disposed on a side panel disposed below the top end and between the rear end and the front end of the trailer, the plurality of air inlets in fluid communication with the gas turbine and the electrical generator, and the plurality of air inlets configured to receive and filter air comprising at least one of combustion air and ventilation air.