All SeriesBTK Comfort Series Panel Air Conditioner Models & Details BTK 500 Series Panel Air Conditioners BTK 750 Series Panel Air Conditioners BTK 1000-1500-1700 Series Panel Air Conditioners BTK 2000-3000 Series Panel Air Conditioners BTK 4000 Series Panel Air Conditioners Maximum Clearance Between Air Inlet and Outlet Suitable for 50 and 60Hz Protection Class According to Switchboard Standard Controller Ease of Assembly Auto Restart Function Product Documents Please contact us for more technical details.--BTK4000 Indoor Template(pdf)BTK4000 Outdoor Template(pdf)BTK4000 Opening Cover Template(pdf)-BTK4000 Indoor Template(dxf)BTK4000 Outdoor Template(dxf)BTK4000 Opening Cover Template(dxf)-Air Conditioner CalculatorMaintenance InstructionsGeneral Catalog