If our HVAC equipment was installed as part of a construction or capital improvement project, who handles the warranty — the general contractor or TriState HVAC directly?

Warranty coverage follows the equipment itself, not the contractor: coverage typically expires 12 months from startup completion or 18 months from shipment, whichever comes first. School facilities staff should keep the original PO, startupreport, and maintenance logs on file (independent of the contractor relationship), since TriState requires documented proof of routine maintenance to honor a warranty claim, and claims must be submitted in writing within 5 business days of discovering an issue.