with forced circulation

Introduced: September 1968

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Air heaters > with forced circulation

CPC subdivides this area 3x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

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F24H 3/022 CPC only CPC only
F24H 3/025 CPC only CPC only
F24H 3/027 CPC only CPC only
F24H 3/04 the air being in direct contact with the heating medium, e.g. electric heating element +3 CPC IPC+CPC Available in IPC and CPC
F24H 3/06 the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators +3 CPC IPC+CPC Available in IPC and CPC