// CODE SNIPPET
507.26 Accessibility for Service
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Appliances shall be
located with respect to building construction and other equipment
so as to permit access to the appliance. Sufficient clearance
shall be maintained to permit cleaning of heating
surfaces; the replacement of filters, blowers, motors, burners,
controls, and vent connections; the lubrication of moving
parts where necessary; the adjustment and cleaning of burners
and pilots; and the proper functioning of explosion vents,
where provided. For attic installation, the passageway and
servicing area adjacent to the appliance shall be floored.
[NFPA 54:9.2.1]