AHRI Guideline X: Induced Draft Furnace Heat Exchanger Inspection
Guideline Scope
This guideline applies to the inspection of induced draft furnace heat exchangers.
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AHRI Guideline X-2023 Induced Draft Furnace Heat Exchanger Inspection
AHRI Guideline X-2009 Induced Draft Furnace Heat Exchanger Inspection
©2023, by Air-Conditioning, Heating and Refrigeration Institute