with both heat and humidity transfer between supplied and exhausted air

Full Title

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 (room units F24F1/00) > characterised by the treatment of the air otherwise than by heating and cooling > by humidification; by dehumidification > with both heat and humidity transfer between supplied and exhausted air