It’s a fact that proper maintenance of HVAC systems improves efficiency, reliability and longevity of equipment. A simple way to justify the value of a maintenance plan is to start with a piece of equipment or system that has not been properly maintained. Review the maintenance records for the equipment or system. How has the lack of maintenance impacted the operation in terms of reactive maintenance costs and interruptions of service compared to what it would have cost to perform scheduled maintenance? If maintenance has not been a high priority, chances are that there will be a number of equipment failures that occurred during the year. Some will be random failures that maintenance may not have been able to prevent. Others will be the direct result of poor maintenance.