CPC Subgroup
F04D 25/08 the working fluid being air, e.g. for ventilation
Full Title
Pumping installations or systems (controlling F04D27/00) > Units comprising pumps and their driving means > the working fluid being air, e.g. for ventilation
5 direct subcodes
Child Classifications
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- F04D 25/10 the unit having provisions for automatically changing direction of output air
- F04D 25/12 the unit being adapted for mounting in apertures