Preventive Maintenance Service is priced at $300 per hour minimum ten (10) hours and provides for the application of replacement parts or rebuilding of critical components of system and confirming proper operation upon completion. If there has been no service history with our group an evaluation of the system will be made and any issues must be corrected prior to performing PM. Charges for this effort will be billed in addition. Travel expenses are included. Planning must be 14 days in advance.