Historical
NFPA 90B-2021
NFPA 90B, 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.
CONTENT PROVIDER
National Fire Protection Association [nfpa]
National Fire Protection Association [nfpa]