12,000 BTU Through-the-Wall A/C with Heater

Updated August 22, 2026

Notes: Universal plug unable to test. Condition: New - Packaging flawed Damaged?: No In Packaging?: Yes Missing Parts?: No Functional?: Unable to Test Brand: Keystone UPC: 840148726086 Model: KSTAT12-2HD Keep your space cool and comfortable with this Keystone through-the-wall air conditioning unit. Designed to cool rooms up to 550 sq. ft., this 12,000 BTU air conditioner delivers efficient cooling. The dehumidification feature eliminates up to 2.5 pints of moisture per hour to improve air quality. It provides a supplemental heating capacity of 10,600 BTU, making it perfect for smaller living spaces such as apartments, dorm rooms and sheds. Since this unit is not meant as a primary heat source, use the supplemental heating mode when outdoor temperatures range from 23 to 76 degrees Fahrenheit. A built-in thermostat accurately senses the room temperature, displays it on the included remote's LCD screen and communicates with the AC unit every three minutes to enable precise cooling. The energy saver mode, sleep mode and programmable 24-hour timer help lower electricity costs. To ensure optimal performance, it offers a Check Filter alert to remind you to clean the mesh filter. This air conditioner requires a special 230V/20-amp electrical outlet and is incompatible with a standard 115V household electrical outlet. Air Conditioner Features: Timer. Air Conditioner Product Type: Through the Wall Unit. Air direction/circulation: 4-way. Amperage (amps): 15. Appliance Category: A/Cs and Fans. Appliance Series: Not Applicable. BTU Cooling Rating (ASHRAE): 12000 BTU. BTU Cooling Rating (DOE SACC): 12000 BTU. BTU Heat Rating: 10600 BTU. Color Family: White. Combined Energy Efficiency Ratio (CEER): 0. Control Type: Remote Control. Controls: Digital. Cord Length (ft.): 6 ft. Coverage Area (Sq.Ft): 550 Sq.Ft. Decibel (Sound) Rating: Not Measured. Energy Efficiency Ratio (EER): 0. Filter Type: Mesh. Heater Included: With Heater. Included: Remote Control. Number of Fan Speeds: 3 Speeds. Number of cool settings: 3. Pack Size: 1. Plug Type: Perpendicular. Product Weight (lb.): 78.30 lb. Refrigerant Compatibility: R-32. Voltage (volts): 230. Wattage (watts): 0. Certifications and Listings: No Certifications or Listings. Cut-Out Depth (in.): 20.300 in. Cut-Out Height (in.): 14.500 in. Cut-Out Width (in.): 24.200 in. Product Depth (in.): 20.300 in. Product Height (in.): 14.500 in. Product Width (in.): 24.200 in. Controls: Digital. Voltage (volts): 230. Heater Included: With Heater. BTU Cooling Rating (DOE SACC): 12000 BTU. Coverage Area (Sq.Ft): 550 Sq.Ft. Included: Remote Control. Plug Type: Perpendicular. Features: Timer.

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