When is a Mechanical Permit Required?
A mechanical permit is required to erect, install, enlarge, alter, repair, remove, convert, or replace a mechanical heating, ventilating, or air-conditioning system, the installation of which is regulated by the International Mechanical Code (IMC), International Fuel Gas Code (IFGC), or the International Residential Code (IRC), as appropriate. These pieces of equipment include, but are not limited to furnaces, heat pumps, air-conditioning units, range hoods, cooling towers, chillers, fuel-oil tanks and piping systems, and boilers.