The Keystone Core 18,000 BTU Mini Split AC and Heating System delivers quiet, energy-efficient comfort for bedrooms, offices, living rooms, and other spaces up to 1,000 sq. ft. This 230V 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 20 SEER2 efficiency, advanced inverter technology, and an optimized R32 refrigerant system, it continuously adjusts output to help reduce energy use while maintaining steady indoor comfort without bulky ductwork. Built for dependable year-round performance, this mini split operates in outdoor temperatures ranging from 5°F to 127°F for reliable comfort through changing seasons. Indoor sound levels as low as 32 dB make this Core system quieter than a whisper. Multiple modes including Cool, Heat, Dry, Fan, Turbo, Sleep & ECO allow for customized comfort throughout the day. Wi-Fi, app control, and smart home compatibility provides convenient remote access to temperature adjustments, scheduling & energy-saving controls. Keystone customer service helps coordinate professional installation to save time & effort, while durable construction & an up to 7-year warranty support trusted, reliable performance.

• Ultra High Efficiency for Real Energy Savings: This Core series delivers up to 20 SEER2 performance, using advanced inverter technology to continuously adjust output, reduce energy waste, and keep temperatures steady.
• Powerful, Consistent Heating That Eliminates Cold Spots: Designed to maintain consistent operation in temperatures ranging from 5° - 127°F, this mini split provides stable heating & cooling for bedrooms, offices, living rooms & spaces up to 1,000 sq. ft.
• Whisper Quiet Indoor Operation: Indoor sound levels as low as 32 dB make this Core system quieter than a whisper, ideal for bedrooms, offices, living rooms, and any environment where peace and quiet matter. You feel the comfort, not the noise.
• 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.
• Smart Comfort Controls: Multiple comfort modes, including Cool, Heat, Dry, Fan, Turbo, Sleep, and ECO, give users full control of their environment. Inverter precision minimizes temperature swings for steady, reliable comfort.
• App & Voice-Enabled Control: Wi-Fi enabled and app-enabled, this ductless mini split supports smart home control, including compatibility with Alexa and Google Home for convenient voice and remote operation.