Invention patent: No. 0356562 Ventilation controller for livestock stables(power saving) New design patent: No. 0187965 Ventilation fan for livestock stales(low noise design) Registration of design: No. 0265200 Bell Mouth type ventilation fan       - Special Proven Quality     Power saving up to 72% with Inverter controller       Noise lower than 70dB     Fanning of 330m/min(RLF-100FS/FT)     Vibration lower than 0.009mm    Japanese high technology and design  - Available for RLF-100FS, RLF-100FT - Strong corrosion resistance by employing hot dipping zinc galvanized pipes - Good mobility of wheel - For drying livestock night-soil and relay fan - Solder free galvanized steel plate employed - Bell Mouth structure allows for good airflow with low noise - Keep minimum resistance by using 2mm stainless steel propeller

1.Water resistance structure (water pressure less than 10kg/cm2):it is strong against rain or snow 2.Belt tension eqipment: without replacing belt, it can be used a long time due to keep not to droop the belt. 3.Opening the shutter, it makes lowest noisy and lowest electric power.

- Drying night-soil in wood meal cattle pen,intermediary ventilation and exhaustion from   livestock stables(pigpen,chicken raising ,cow house),plant ventilation.

Model Impeller Size (mm) Phase.Volt (∮/V/Hz) Current (A) Poles (P) Output (W) Air Volume (㎥/h) RLF-120FT Ø1200 1/220/60 6.5 1500 39000 3/220/60 5.2 1500 39000 3/380/60 3.0 1500 39000      RLF-120FS 1/220/60 5.8 4 1100 39000 3/380/60 5.2 1100 39000 3/380/60 3.0 1100 39000       Ventilation facilities provides   appropriate raising environment and affects productivity, so proper intake and exhaustion should be made,and easy and user- friendly controller is needed.                 Necessity of ventilation   Gets rid of stress caused by hot weather in Summer;   - Produce high-grade meat (Korean cow)   - Prevent reduction in amount of milking (milking cow) Promote good feeding;   - Increase periodical increase rate of weight. Dry the floor   - Promote healthful raising environment and prevents diseases.   - Save annual management cost due to reduction in supply amount and times of wood meal.   - Prevent various diseases and stress caused by vermin such as flies and mosquitoes Increases delivery and estrus rate and encourages fertilization at all seasons