.~.~ Having recirculating duct connecting upper and lower room air strata
DEFINITION
Classification: 454/231
Having recirculating duct connecting upper and lower room air strata:
(under subclass 230) Subject matter comprising a conduit which guides air between separate horizontal air layers within a ventilated chamber.
(1) Note. The air in the different layers usually differs in some characteristic such as temperature.
(2) Note. The conduit must connect different strata within the same chamber or room to be included in this subclass (i.e., a duct connecting two different chambers on different floors of a building is not included in this subclass).
SEE OR SEARCH THIS CLASS, SUBCLASS:
187, for a clean room having a recirculating duct connecting upper and lower room air strata.
