AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)

Introduced: September 1968

Description

F24F covers systems and apparatus for controlling indoor air quality and environmental conditions through cooling, heating, moisture regulation, and air movement. This subclass encompasses air conditioning units, ventilation systems, air humidifiers and dehumidifiers, and devices that utilize air currents for dust or particle screening purposes. It includes both centralized climate control systems and localized air treatment equipment used in residential, commercial, and industrial applications. Related heating and combustion systems are classified separately under F24B and F24D.

Title

Titles differ between systems:

IPC: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING

CPC: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)

Full Title

Full titles differ between systems:

IPC:

AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING

CPC:

AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)

Of 20 combined children, 10 exist in both systems.

6 codes are CPC-only extensions, 4 exist only in IPC.

Note: 6 CPC extensions are marked as secondary classification only.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

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F24F 1/00 Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station IPC+CPC Available in IPC and CPC
F24F 11/00 Control or safety arrangements +2 CPC IPC+CPC Available in IPC and CPC
F24F 110/00 Control inputs relating to air properties since 2018 −5 IPC IPC only IPC only
F24F 12/00 Use of energy recovery systems in air conditioning, ventilation or screening (with both heat and humidity transfer between supplied and exhausted air F24F3/147) since 1985 +1 CPC IPC+CPC Available in IPC and CPC
F24F 120/00 Control inputs relating to users or occupants since 2018 −2 IPC IPC only IPC only
F24F 13/00 Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening IPC+CPC Available in IPC and CPC
F24F 130/00 Control inputs relating to environmental factors not covered by group since 2018 −4 IPC IPC only IPC only
F24F 140/00 Control inputs relating to system states since 2018 −6 IPC IPC only IPC only
F24F 2110/00 Control inputs relating to air properties 2nd only +5 CPC CPC only CPC only
F24F 2120/00 Control inputs relating to users or occupants 2nd only +2 CPC CPC only CPC only
F24F 2130/00 Control inputs relating to environmental factors not covered by group F24F2110/00 2nd only +4 CPC CPC only CPC only
F24F 2140/00 Control inputs relating to system states 2nd only +6 CPC CPC only CPC only
F24F 2203/00 Devices or apparatus used for air treatment 2nd only +3 CPC CPC only CPC only
F24F 2221/00 Details or features not otherwise provided for 2nd only +26 CPC CPC only CPC only
F24F 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 (room units F24F1/00) +3 CPC IPC+CPC Available in IPC and CPC
F24F 5/00 Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00 +9 CPC IPC+CPC Available in IPC and CPC
F24F 6/00 Air-humidification since 1980 +5 CPC IPC+CPC Available in IPC and CPC
F24F 7/00 Ventilation +4 CPC IPC+CPC Available in IPC and CPC
F24F 8/00 Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying since 2021 IPC+CPC Available in IPC and CPC
F24F 9/00 Use of air currents for screening, e.g. air curtains +3 CPC IPC+CPC Available in IPC and CPC