Ductless mini-split air conditioners are an efficient cooling solution – but they’ll only remain that way if maintenance is performed regularly. Ductless mini-split systems are also a scalable way to cool specific rooms of your building. Mini-splits should be maintained on a similar schedule as your commercial HVAC systems. Whether visibly dirty or not, a dirty mini-split system may cause a variety of health problems. Aside from being a good location for micro-organisms and other bacteria to thrive - it’s an excellent environment for mold (and who knows what else) to grow. With air constantly circulating through the unit into your building, the unsanitary air may be sent into other common areas of your building.