All installations and services must be performed by qualified service personnel.
E. Air for Combustion and Ventilation
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Relief openings in the front or top of the furnace casing should not be obstructed or blocked. These openings supply combustion and ventilation air to the furnace.
Chloride, fluoride, iodide, and bromide bearing compounds when present, even in low concentrations, in air supplied for combustion to the furnace, can result in accelerated and severe corrosion of the heat exchanger and/or the venting systems. This condition can occur with less efficient furnaces, but is accelerated on furnaces with efficiencies of 80% or greater.
Many, household chemicals contain
•Cleaning solvents
•Varnish and paint removers
•Bleaches
•Fabric softeners
•Water softener salt
•Tile adhesives
Avoid installing the furnace in areas where it is evident these chemicals are being stored, or used, within close proximity to the furnace. In addition, avoid storing or using any chemicals of an unknown nature in close proximity to the furnace. If it is necessary to store or use these chemicals in the same space as the furnace, all containers should be sealed when not in use. If possible, keep these chemicals in a separate,
The furnace shall be installed in a location within the building that permits a satisfactory supply of air for combustion, ventilation, and proper operation of the venting system. While all forms of building construction cannot be covered in detail in this manual, this requirement may usually be met by application of one of the following methods in ordinary building construction. Consult the National Fuel Gas Code, NFPA 54/ANSI Z223.1 – 2002, or the latest edition, for special cases and further details. However, local installation codes always take precedence and must be followed, if applicable.
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