Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F24
HEATING; RANGES; VENTILATING
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F24F
AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
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3/00
Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
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F24F3/06
characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
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F24F3/08
with separate supply and return lines for hot and cold heat-exchange fluids; i.e. so-called "4-conduit" system
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