HVAC Annual Service Agreements - Worth the money???

[Ashley Garner]

I have a 32 unit property, which has an office building, thus making 33 total HVAC systems.  Have received a proposal from a reputable HVAC contractor to provide a 1 year Preventive Maintenance plan which includes 2 preventive cleanings per unit per year (and also includes testing, general maint, adjustments, etc) and includes 15% discount on repairs, 24 Service Calls and no Overtime.  The cost is $6700 for 12 months.  (note for comparison - I just replaced a down unit for $5200.00).

Is the Preventive Maintenance plan worth the money??

Thanks in advance!!

ASHLEY