MMSI offers residential and commercial heating, air conditioning, commercial kitchen equipment and plumbing work in and around the Kansas City Metropolitan area. We can customize a maintenance plan to fit any home or business need. Integrity, honesty and success are our goals. We offer no trip charges within the metro area and driving time trip charges outside of the area. There are no hidden fees on top of our hourly wages. We are fully insured and bonded. Residential & Commercial Walk-In Coolers Sewage Pumps Sewage Pumps Heat Pumps Boilers Drains Maintenance Programs Much More