The Keystone Summit 12,000 BTU Mini Split AC and Heating System delivers efficient, year-round comfort for bedrooms, offices, additions, studios, and other spaces up to 550 sq. ft. This 115V Energy Star-certified ductless system includes indoor and outdoor units and is designed for professional installation to help ensure proper setup, optimized performance, and reliable long-term use. With up to 23 SEER2 efficiency, advanced R454B refrigerant, and inverter-driven technology, it continuously adjusts output to maintain a more consistent indoor temperature while reducing energy consumption compared to many traditional systems. Built for dependable operation in demanding climates, this mini split performs in outdoor temperatures ranging from 5°F to 131°F. The indoor unit operates as low as 30 dB on low fan. Multiple comfort modes including Cool, Heat, Dry, Fan, Turbo, Sleep, and ECO allow for customized comfort throughout the day. Wi-Fi, app control & smart home compatibility with smart home devices provide convenient remote access to temperature adjustments, scheduling, and energy-saving controls. Keystone customer service helps coordinate professional installation to save time & effort, while premium construction and an up to 7-year warranty support trusted, reliable performance.

• Maximum Efficiency & Energy Savings: This Energy Star-certified Summit series delivers up to 23 SEER2 performance, with higher efficiency, more consistent temperature control, and lower energy consumption than many competing units.
• Reliable Performance in Extreme Climates: Designed to maintain strong output in temperatures ranging from 5°F to 131°F, this 115V mini split AC ensures reliable, even heating and cooling for bedrooms, offices, and other spaces up to 550 sq. ft.
• Advanced Noise Reduction for Quiet, Comfortable Living: Indoor units operate at 30 dB on low fan, making them quieter than a soft whisper. Perfect for bedrooms, nurseries, studies, or any space where noise control is essential.
• Complete Mini Split System for Larger Rooms: This 12,000 BTU system includes indoor and outdoor units for spaces up to 550 sq. ft.; professional installation is required for proper setup, optimized performance, and long-term reliability.
• Cleaner Cooling: This advanced Summit series combines high efficiency with a more eco-conscious R454B refrigerant that reduces environmental impact and supports energy-efficient operation compared to many older refrigerant systems.
• Total Comfort Control: Modes including Cool, Heat, Dry, Fan, Turbo, Sleep, and ECO allow for complete customization. The inverter system minimizes temperature swings for consistent, reliable comfort throughout the day.