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• hydrochloric acid/muriatic acid
• cements and glues
• antistatic fabric softeners used in clothes dryers
• chloride-type bleaches, detergents, and cleaning
solvents found in household laundry rooms
• adhesives used to fasten building products
• ... and other similar products.
Areas causing contaminated combustion air:
• dry cleaning/laundry areas and establishments
• metal fabrication plants
• beauty shops
• refrigeration repair shops
• photo processing plants
• auto body shops
• plastic manufacturing plants
• furniture refinishing areas and establishments
• new building construction
• remodeling areas.
Check for areas and products as listed above before
installing heater. If found:
• remove products permanently, OR
• provide outdoor combustion air.