The Keystone Summit 18,000 BTU Mini Split AC and Heating System delivers powerful, energy-efficient comfort for bedrooms, offices, living rooms, additions, and other spaces up to 1,000 sq. ft. This 230V 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. Wi-Fi, app control, and 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 and 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 230V mini split AC ensures reliable, even heating and cooling for bedrooms, offices, living rooms, and spaces up to 1,000 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 Living Spaces: This 18,000 BTU system includes indoor and outdoor units for spaces up to 1,000 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.