Mechanical Solutions is a full service MBE Certified mechanical contractor serving the St. Louis and Eastern Missouri Area. W ... e specialize in HVAC, and Mechanical design/build of commercial and industrial projects. Mechanical Solutions, Inc. engineers, custom fabricates, and installs HVAC duct work and process piping. Our HVAC service department offers, maintenance, repair, retro-fit and replacement from the state of the art HVAC to waste oil boilers on commercial facilities or residential homes. Our service fleet is ready to respond within hours. read more