NFPA 90B 2018 Standard for the Installation of Warm Air Heating and Air-Conditioning Systems
Standard for the Installation of Warm Air Heating and Air-Conditioning Systems.
NFPA 90B provides requirements that cover the construction, installation, operation, and maintenance of systems for warm air heating and air conditioning, including filters, ducts, and related equipment to protect life and property from fire, smoke, and gases resulting from fire or from conditions having manifestations similar to fire.
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