Good morning,

My apologies for the delay and inconvenience. This is a thru-the-wall unit, our orders are shipped from our warehouse in Countryside, Illinois. The warranty is a full one year replacement plan when deemed defective. The decibels are 57/54/52 when the fan is on high/medium/low. It is through Houzz's return policy. For any questions regarding installation and manufacturer please contact us directly at (866)996-9255. Thank you for your patience.