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Clearances between heat-producing appliances and combustibles shall be in accordance with this section. Where specific manufacturer's instructions or listings allow a reduction from the distances specified in this section, those distances are allowed. Clearance reductions permitted by the Mechanical Code are allowed.
603.5.3.1 Gas or Fuel-Oil Heaters
A minimum of 18 inches (457 mm) shall be maintained between gas or fuel-oil heat-producing appliances and combustible materials.
603.5.3.2 Solid Fuel-Burning Heaters
A minimum of 36 inches (914 mm) shall be maintained between solid fuel-burning appliances and combustible materials.
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