Air Conditioning System Cooling equipment is also essential to the comfort of members, especially in the summer months and in warmer regions. When people gather in churches and other religious facilities, an air conditioning breakdown can make it difficult. Air conditioning systems contain a variety of parts and must work all the harder when called upon to cool large open spaces filled with many people. The compressor units are often the components that break down and can be expensive to replace. © 2007 The Boiler Inspection & Insurance Company of Canada.     All rights reserved.