Have always had good experiences with Northwind in the past with service calls. Decided to replace my AC unit after speaking with technician David. He explained thoroughly what was wrong with my existing unit both outside and in the attic. Installation began on time in the morning. Installers were professional, courteous and did more in the attic than I anticipated with the existing ducts and all the connections to the new unit. Amazing job by them. Nice clean up at the end. Lead tech David stopped by before, during and after installation explaining the new unit well. Great local business for the Oak Forest/Garden Oaks area. I recommend.