SmartFan(Bathroom fan unit) ? SmartFan is a brand new product to solve problems of bathroom ventilation of high rise apartment houses. It is an exceptionally high quality fan which always enables to exhaust constant air volume at any floor under 50 stories. ? At 200 Pa static pressure, SF-60 can exhaust 60m3/h and SF-100 can exhaust 80m3/h ? SmartFan consumes low electric power, has "Back draft damper" built-in and makes low noise.  ThruVent System(Ventilation System for underground parking lots) ? New Concept of Underground parking lots' ventilation   - Fanroomless Ventilation System ? Using Nozzle fan for suppling and exhausting air instead of sirocco fan ? Fanroom isn't needed  ? Effective space is increased  (More available parking space)  ? Saving initial costs,  Construct costs of fanroom  ? Saving energy costs(lower energy consumption than sirocco fan)