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MASONRY CHIMNEY :
Ensure that a masonry chimney meets the minimum standards of the National Fire Protection Association (NFPA) by having it
inspected by a professional. Make sure there are no cracks, loose mortar or other signs of deterioration and blockage. Have the
chimney cleaned before the appliance is installed and operated. When connecting the appliance through a combustible wall to a
masonry chimney, special methods are needed.