The installation of clothes dryers shall comply with the following requirements:
- Listed Type 1 clothes dryers shall be installed with a clearance of not less than 6 inches (152 mm) from adjacent combustible material. Clothes dryers listed for installation at reduced clearances shall be installed in accordance with their listing and the manufacturer's installation instructions. Type 1 clothes dryers installed in closets shall be listed for such installation.
- Listed Type 2 clothes dryers shall be installed with clearances of not less than that shown on the marking plate and in the manufacturer's instructions. Type 2 clothes dryers designed and marked, "For use only in noncombustible locations," shall not be installed elsewhere.
- Unlisted clothes dryers shall be installed with clearances to combustible material of not less than 18 inches (457mm). Combustible floors under unlisted clothes dryers shall be protected in an approved manner.
Type 1 and Type 2 clothes dryers shall be exhausted to the outside air in accordance with Section 504.4.