603.18 Registers, grilles and diffusers. Duct registers, grilles and diffusers shall be installed in accordance with the manufacturer’s instructions. Volume dampers or other means of supply air adjustment shall be provided in the branch ducts or at each individual...
Manual D duct design is generally required in Florida, particularly for new construction and significant renovations. Florida’s Energy Conservation Code, based on the International Residential Code, mandates that Manual D duct layouts accompany...
