Heating Systems / Storage Water Heaters Packaged heating systems that combine heating with air conditioning functions are typical for many convenience stores. Such systems generally include a variety of components such as heaters, electric powered compressors, air handlers, blowers and dampers. Some of this equipment is often located on the exterior where it is exposed to the elements and can suffer breakdowns due to water intrusion or weather conditions. That means a storeowner may have to rush repair service at additional cost. Most water heater system breakdowns can be linked to overheating due to the loss of water and/or excessive internal scale build-up in the water heater. © 2004 The Hartford Steam Boiler Insurance and Inspection Company.     All rights reserved.