Thank you for your question. This particular product is the outdoor condenser only. For it to be a functional system, one or more indoor air handlers would be required as well as all of the installation accessories, such as line sets, electrical components, a wall sleeve, etc. We do have system packages available which include the condenser, the air handler(s) and depending on the system package selected, some of the installation accessories. To view our available 36K DIY MRCOOL system packages click here. For more assistance, please give us a call.