Double-Sided Shutter Series Fan 1 cup oil with detachable design, more convenient cleaning and maintenance; 2 two mode first mode exhusust air second mode bring in fresh air 3 The series of products using advanced CFD CFD software to optimize the design, Air volume, low efficiency, low noise; 4 All the wind wheel balancing test and undergo a rigorous weight; 5 products located blinds to prevent outside air, mosquitoes into the room; 6 All products unified with ball bearings, copper coils, life of up to 5 years; 7 using hot reset protection, sealed housing, protection grade IP44; 8 high-quality start capacitor and three core sheathed cable, to the extreme harsh environments (-25 Degrees to 90 degrees) continuous operation; 9 thickening of the box housing, safer operation; 10. Provide OEM & ODM, one-year warranty.

all diameter and installation detail:http://www.mingfans.co.nz/product/html/?52.html please see my other list . http://www.trademe.co.nz/Members/Listings.aspx?member=1231594

Mingfans are professional fan specialists.we supply and install industrial/commercial fan;electric motor and water pump to meet your requirements

Maintainence: We have professional installation to install all our products feel free ask to give you a free qoutation

Refund & Repair Guarantee Terms: *This Product come with 1 YEAR Return To Base Warranty *For any reason, postage is not refundable; All postage for replacement on buyer side *Faulty unit only replacement or repair no refund unless in some special cases. *15% restock fee concluded to any refund

100% NZ Owner Company

Feel free to ask any question

Pick up Mt Wellington,Auckland. we are open Monday to Friday 9.00am to 5.00pm. saturday,sunday appointment only