Managing General Contractor Agreement. The purpose of this contract is to provide comprehensive Heating, Ventilation, and Air.In this post, we share a free HVAC service agreement template that you can use to set up recurring service agreements with your customers. The Document Center provides easy access to public documents. Click on one of the categories below to see related documents or use the search function. This HVAC contract template contains areas for scope of work, client details, pricing, and legal terms. Broward County Uniform Building Permit Application (filled out and notarized). Documented proof of cost, including all labor and materials (signed contract).