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Steam-heating boilers and hot-water-heating boilers that exceed one of the following limits:
  1. 5 000 000 Btu/h input (1464 kW)
  2. 5000 pounds steam per hour (0.6299 kg/s) capacity
  3. 1000 square foot (92.9 m2) heating surface
Power boilers that do not exceed one of the following limits:
  1. 5 000 000 Btu/h input (1464 kW)
  2. 5000 pounds steam per hour (0.6299 kg/s) capacity
  3. 1000 square foot (92.9 m2) heating surface
Boilers with manholes on top of the boiler, except those described in Section 1010.2 and Section 1010.4, shall have a clearance of not less than 3 feet (914 mm) from the top of the boiler to the ceiling.

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