Labor Day Appliances SaleEnds 9/16. Limited quantities. No rainchecks.Shop now

Skip to contentGo to Product Search
Main Content

Keystone - Core 230V 400 Sq. Ft. 9,000 BTU Smart Mini Split Air Conditioner 10,000 BTU Heater - White

Model: KYSTNTV09CB2
SKU: 6690178

Reviews coming soon

Sold byBest Buy

About this product

The Keystone Core 9,000 BTU Mini Split AC and Heating System delivers quiet, energy-efficient comfort for bedrooms, offices, and other spaces up to 400 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 21 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 28 dB make this Core system quieter than a whisper. Multiple modes including Cool, Heat, Dry, Fan, Turbo, Sleep, and ECO allow for customized comfort throughout the day. Wi-Fi, app control, and smart home compatibility with smart home devices provide convenient remote access. Keystone customer service helps coordinate professional installation to save time and effort, while durable construction and an up to 7-year warranty support trusted, reliable performance.

Features
  • Up to 21 SEER2 Efficiency

    The inverter-driven system delivers 9,000 BTU cooling and 10,000 BTU heating, adjusting output as conditions change to support steady, efficient comfort in spaces up to 400 sq ft.

  • Targeted Comfort for Small Spaces

    Ideal for homeowners, property managers, and office managers seeking focused heating and cooling for small bedrooms, home offices, private offices, studies, and similar rooms.

  • Built for Changing Seasons

    Designed to operate in outdoor temperatures from 5°F to 127°F, the system provides dependable heating and cooling through hot summers, cold weather, and transitional seasons.

  • Quiet for Sleep and Focus

    The indoor unit operates at sound levels as low as 28 dB, helping minimize disruption while sleeping, working, studying, joining calls, watching TV, or relaxing.

  • Control Comfort Your Way

    Use the app or compatible voice control to adjust temperatures, modes, schedules, and routines remotely. Choose Cool, Heat, Dry, Fan, Turbo, Sleep, or ECO mode to match daily comfort needs.Uses R32 refrigerant.

See all features
Specifications
  • Recommended Room Size
    400 square feet
    BTU Cooling Rating
    9000 british thermal units
    Number of Cool Settings
    5
    Number of Fan Speeds
    5
    Airflow Rate
    335 cubic feet per minute
    Remote Control
    Yes
Sponsored

Reviews

This product doesn't have any reviews yet.

Be the first to ask a question.

We’ll try to get your question answered within 24 hours by a Best Buy customer or brand representative.

No content
Sponsored

Finance Options

My Best Buy® Credit Card
Choose a benefit:Or
Buy Now, Pay Later
Lease to own