The Keystone 12,000 BTU Thru-The-Wall 230V Air Conditioner effectively cools medium to large-sized rooms such as apartments, living rooms, offices, and bedrooms up to 550 square feet. It features simple controls, multiple operating modes, and a supplemental heating option. Cooling Capacity: 12,000 BTUs per hour Cooling Range: 60 to 90 degrees F Noise Level: About 60 dB, similar to a normal conversation Remote Control: “Follow me” function senses temperatures remotely Filter: Package includes “Easyclean” mesh filter Supplemental Heater Option Choose model KSTAT12-2HD for the Keystone 12,000 BTU Thru-The-Wall Air Conditioner with a supplemental heat pump. This model can provide reliable heat to spaces as a supplement to a primary heating source. Heating Capacity: 10,600 BTUs per hour Optimal Outdoor Temp. Range: 23 to 76 degrees F Heating Power Input: 3450W Simple Operation Thanks to the Keystone 12,000 BTU's simple operating modes and features, users can feel confident that they can quickly and effectively control their local indoor climate. The unit can be controlled through an LED display or with the included wireless remote control. Multiple Fan Speeds: This product features adjustable louvers, three cooling speeds, three fan speeds, and one heat speed. Timer Mode: The 24-hour programable timer can be set to heat and cool on your schedule. Eco Mode: Conserves energy by automatically shutting the unit down when it reaches a desired temperature. Sleep Mode: Gradually increases the room temperature as users sleep. Dry Mode: Dehumidifies a space and removes up to 2.5 pints of moisture per hour. Auto Restart: Automatically saves and restores unit settings during a power outage. Energy Usage and Efficiency This through-wall air conditioner effectively heats and cools with efficiency and an estimated yearly energy cost similar to many other comparable air conditioner models. However, estimated energy costs are based on a national average electricity cost and may not be correct for all households. Combined Energy Efficiency Ratio: 10.5 (KSTAT12-2D) / 9.5 (KSTAT12-2HD) Estimated Yearly Energy Cost: $111 (KSTAT12-2D) / $123 (KSTAT12-2HD) Installation Install this air conditioner unit directly through a wall, using either an existing or new wall sleeve and the included installation materials. Detailed instructions for installing the Keystone unit in different situations and information on trim frame fitting, care, and maintenance are included. Installation Kit: The installation kit includes all hardware, trim, dividers, seals, and instructions needed for installation. Note: The unit requires a wall sleeve, which is sold separately. Power Requirements: This air conditioner requires a special 230V/20-amp electrical outlet and will not work on a standard household 115V outlet. Wall Sleeve Required: This model's sliding chassis fits Keystone Wall Sleeve KSTSLV1 (which measures 25.5 inches by 17.5 inches by 15.25 inches). Plug Type: NEMA 6­15P grounding plug Summary This 12,000 BTU through-the-wall air conditioner cools spaces up to 550 square feet with powerful efficiency, easy-to-use operating modes, and a simple design.