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PCE
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DIFF Subgroup
F24D 5/04

with return of the air or the air-heater

Introduced: September 1968

Title

Titles differ between systems:

IPC: with return of the air to the air heater

CPC: with return of the air or the air-heater

Full Title

Full titles differ between systems:

IPC:

Hot-air central heating systems; Exhaust-gas central heating systems > operating with discharge of hot air into the space or area to be heated > with return of the air to the air heater

CPC:

Hot-air central heating systems (district heating systems F24D10/00; central heating systems using heat accumulated in storage masses F24D11/00; air conditioning F24F); Exhaust gas central heating systems > operating with discharge of hot air into the space or area to be heated > with return of the air or the air-heater

No child classifications to compare. This is a leaf node in both IPC and CPC.