Ventilator TEC-RV (Roof Exhaust fan without electric power)

Description
Non Electric Power Roof Ventilator is based on hydrokinetics and thermodynamics, desige for outside work on the roof a few different temperature and different air pressure between outdoor and indoor, ventilator run automatically and create centrifugal force, create a negative pressure space below the ventilator, chimney effect take out heat, humidity, dust,
Material: stainless steel this ventilator is non electric, 24 hours run, application for: Commercial kitchens of restaurants, kithchens of residences
Industry: paint workshop, warehouse, machinery
Main air extraction for residences, office, laboratories, building: apartment, house, hotel, office, school, supermarket, station, hospital, shop, exhibition hall, gymnasium，church, emporium etc.