| ReturnTo Theme-Group-Choice | Onelevelup |
| 3L072 | Central heating systems using electricity or heat accumulation | |
| F24D13/00 -15/04 | ||
| F24D13/00-15/04 | AA | AA00 ELECTRICAL AND OTHER DOMESTIC HEATING SYSTEMS |
AA01 | AA02 | AA04 | AA05 | AA06 | AA08 | ||||
| . Radiant-heating systems | . . Use of heating media | . Convection-heating systems | . . Forced convection | . . . Use of heating media | . Combined systems | |||||||
| AB | AB00 HEATING LOCATIONS |
AB01 | AB02 | AB03 | AB04 | AB06 | AB07 | AB08 | AB09 | AB10 | ||
| . Panels | . . Standing panels | . . Floor panels | . . . Electric carpets | . Water closets | . Area with sinks for washing up | . Kitchen | . . Kitchen appliances | . Others | ||||
| AC | AC00 HEAT SOURCES |
AC01 | AC02 | AC03 | AC04 | AC05 | ||||||
| . Combustion | . Electricity | . Exhaust gases | . Hot water | . Others | ||||||||
| AD | AD00 STRUCTURE |
AD01 | AD02 | AD03 | AD04 | AD05 | AD06 | AD07 | AD09 | AD10 | ||
| . Panel surface | . Panel interior | . . Heat transfer | . . Heat insulation | . . Reflection | . . Heat storage | . . Air permeation | . Connection of panels | . Folding of panels | ||||
| AD11 | AD12 | AD13 | AD14 | AD15 | AD16 | AD17 | AD18 | AD19 | ||||
| . Panel legs | . Panel arrangement | . Heater arrangement | . Mounting of the heater | . Electric carpet covering | . Operating components | . Manufacture and assembly | . Prevention of collapse | . Others | ||||
| AE | AE00 PURPOSE OF CONTROL |
AE01 | AE02 | AE03 | AE04 | AE05 | AE06 | AE07 | AE08 | AE09 | AE10 | |
| . Provision of heat | . Prevention of cold drafts | . Provision of uniform heating | . Localized heating | . Maintenance of a moderate temperature | . Safety | . . Prevention of overheating | . . Prevention of leakage of electricity | . . Low-temperature combustion | . Others | |||
| AF | AF00 PARAMETERS TO BE DETECTED |
AF01 | AF02 | AF03 | AF04 | AF06 | AF07 | AF09 | ||||
| . Indoor temperature | . . Temperature at multiple locations | . Outdoor temperature | . Indoor and outdoor temperature | . Panel temperature | . . Floor-panel temperature | . Hot-air temperature | ||||||
| AF11 | AF13 | AF14 | ||||||||||
| . Presence or absence of occupants | . Electric source | . . Leakage of electricity | ||||||||||
| AG | AG00 OBJECTS TO BE CONTROLLED |
AG01 | AG02 | AG03 | AG05 | AG07 | ||||||
| . Heat sources | . . Exothermic volume | . . Conversion | . Hot-air ducts | . Switches |