... 7 days after the receipt of payment Terms of payment:T/T, or L/C at sight Supply ability:3000 units ... go to the areas where you ventilate, such as open windows, doors, up-dux or other vents. Ventilation and proper ... damaged,we will offer free,clients take shipping fee,this won't happen in china.4. cheap and easy to install5. ... saving eco-friendly SGS Audit 18000m3/h standard ventilating device XK-18LF