| ReturnTo Theme-Group-Choice | Onelevelup |
| 3L056 | Ventilation (1) | |
| F24F7/00 -7/007,101 | ||
| F24F7/00@C;7/00@D;7/00@Z | BA | BA00 LOCATION OF INSTALLATION OF VENTILATION MEANS |
BA01 | BA02 | BA03 | BA04 | BA05 | BA06 | ||||
| . Ceiling | . Eaves or edge of eaves | . Walls | . Windows or doors | . Locations under the floor | . Others | |||||||
| BB | BB00 MEMBERS FOR CONTROLLING AIR-FLOW |
BB01 | BB02 | BB03 | BB04 | BB05 | BB06 | BB07 | ||||
| . Fixed systems | . Moving systems | . . Systems with a shuttle motion | . . Tilting | . . . Parallel thin plates tilting simultaneously | . . Movement by the action of shape-memory alloys | . Others | ||||||
| BC | BC00 ACCESSORY ELEMENTS |
BC01 | BC02 | BC03 | BC04 | |||||||
| . Noise-elimination means | . Heat-insulation means | . Means for preventing wind draft | . Others | |||||||||
| F24F7/007@B;7/007@C | BD | BD00 DETECTION PARAMETERS |
BD01 | BD02 | BD03 | BD04 | BD05 | BD06 | BD07 | |||
| . Gas concentration | . Temperature | . Humidity | . Gas volume, wind speed, and wind pressure | . Motor overcurrent, and motor-heating resistors | . Filter blockage | . Others | ||||||
| BE | BE00 MOTOR DRIVE MODES |
BE01 | BE02 | BE03 | BE04 | BE05 | BE06 | BE07 | ||||
| . Speed control | . . Multi-step switches | . Stoppage delay | . Reciprocal rotation | . Intermittent motion | . Manual and automatic switches | . Others | ||||||
| BF | BF00 USES |
BF01 | BF02 | BF03 | BF04 | BF05 | BF06 | |||||
| . Restrooms and bathrooms | . Kitchens | . Combined housing units | . Clean rooms | . Elevators | . Others | |||||||
| F24F7/007,101 | BG | BG00 CIRCULATORS |
BG01 | BG02 | BG03 | BG04 | BG05 | BG06 | BG07 | BG08 | BG09 | |
| . Installation and assembly | . Control | . . Temperature equalization | . Combined-use ventilation | . Adjustment of wind direction | . Filtration | . Attached illumination devices | . Heating and humidifying | . Others |