Super quiet top air discharge. Nylon guard is standard. Optional sheet metal and grill guard is available. Coils are constructed of copper tubing with protected aluminum fins for durability and long lasting efficient operation. Refrigerant connections with a single control panel cover make servicing trouble-free. Operating sounds are minimized through upward discharge air flow and innovative design. Service-free permanently lubricated motor-bearings. Service valves are standard on liquid and vapor sweat connections for ease of evacuating and recharging.