Hvac Service contract

Looking for a Service Contract for an HVAC business. Contract should include the following topics: as a "Maintenance Member" the benefits include 1 heat check/year, 1 cool check/year, 1-inch filter provided per visit, 10% discount and priority servicing. Included in the entry should be a description of the Service Plan as a "selling point" for the website (ie. pros/cons of having a Service Contract).