Whenever you are looking for quality and affordable service in the Fox Valley area, you can rely on MJ Mechanical to perform. From installation to same day repair, MJ Mechanical is here to help; 24 hours a day. With today’s rising energy prices we recognize the demand for energy efficiency, so we offer advice and installation of the latest in high efficiency equipment, both for commercial and residential applications. Turn to us for the best in warranties, lowest operating costs, and best value in the industry.