Plans are required to be submitted in triplicate for all commercial HVAC and mechanical systems including the following:

Plans are required to bear the seal of a professional engineer or architect.
Submittals shall include data, forms and information to show compliance with chapter 19 energy conservation; CABO; model energy code; and ASHRAE 90.1-89.
Submittal shall include manufacturing literature, datasheets and details showing weights, clearances, testing lab approvals and certified capacities.
Complete mechanical plans shall be submitted separately and in addition to the building permit submittals.
The plans shall include the following:
Additional Requirements
All mechanical work shall be performed by a contractor holding a valid license from the State of Ohio. An owner/occupancy of a single-family dwelling may install systems in their residence without a license, but a permit is required.
Other Applicable Codes
All HVAC work shall be in accordance with the Fairfield code, chapter 1337; the OBOA, one, two and three family code; the 1998 BOCA international mechanical code; the CABO model energy code; 1993 (MEC); and ASHRAE 62-189.
The permit for the installation of pressure piping systems shall be administered and inspected by the Ohio Department of Industrial Relations, division of pressure piping.
The permit for the installation of boilers and unfired pressure vessels shall be administered by the Department of Industrial Relations, division of boiler inspections.
The installation of gas piping shall be in accordance with the Cincinnati Gas & Electric installation handbook.