Minimum clearance at sides and back wall of boilers shall be three feet. Where a boiler manufacturer identifies in the Installation Manual or any other document that the unit requires more than three feet clearance, those dimensions shall be followed. Boiler manholes shall have five feet of clearance between the manhole opening and any wall, ceiling or piping that will prevent a person from entering the boiler. Clearance in front of the boiler shall be sufficient for operation, maintenance and repair but not less than three feet. The Chief Inspector may waive the minimum clearance requirements of this section if the following requirements have been met:
229 Neb. Admin. Code, ch. 2, § 006