ASHRAE Terminology of Heating

ASHRAE Terminology of Heating, Ventilation, Air
Conditioning, & Refrigeration, 1991).
Recommended: When the term recommended is used in
this document, it means the practice or procedure is
advised or suggested.
Regulated Hazardous Materials: This includes any
substances such as asbestos or lead that are regulated
under applicable national, state and local regulations.
Requirement: Mandatory practice for compliance with
this standard.
Restoration: To bring back to, or put back into, a former
or original state.
Seal: To make secure against leakage by a fastener,
coating, or filler.
Sealant: A fastener, coating, or filler used to seal against
air leakage.