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.

The specification as table here are the general data, these are reference only,

The exact parameters, please see the actual products manufactured by Fengda