Keystone - Summit 115V 400 Sq. Ft. 9,000 BTU Smart Mini Split Air Conditioner 10,000 BTU Heater 23 SEER2 - White
About this product
The Keystone Summit 9,000 BTU Mini Split AC and Heating System delivers efficient, year-round comfort for bedrooms, offices, additions, studios, and other spaces up to 400 sq. ft. This 115V Energy Star-certified ductless system includes indoor and outdoor units and requires professional installation to 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, making it ideal for bedrooms, nurseries, and home offices where quieter operation matters. Multiple comfort modes including Cool, Heat, Dry, Fan, Turbo, Sleep, and ECO allow for customized comfort throughout the day.
Recommended Room Size
400 square'Features
23 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 131°F, the system provides dependable heating and cooling through hot summers, cold weather, and transitional seasons.
Quiet for Sleep and Focus
The indoor unit runs at 30 dB on low fan speed, helping minimize disruption while sleeping, working, studying, joining calls, watching TV, or relaxing.
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.
Specifications
- Recommended Room Size400 square feetBTU Cooling Rating9000 british thermal unitsNumber of Cool Settings5Number of Fan Speeds5Airflow Rate326 cubic feet per minuteRemote ControlYes
Reviews
This product doesn't have any reviews yet.
Compare similar products
The Keystone Summit 9,000 BTU Mini Split AC and Heating System delivers efficient, year-round comfort for bedrooms, offices, additions, studios, and other spaces up to 400 sq. ft. This 115V Energy Star-certified ductless system includes indoor and outdoor units and requires professional installation to 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, making it ideal for bedrooms, nurseries, and home offices where quieter operation matters. Multiple comfort modes including Cool, Heat, Dry, Fan, Turbo, Sleep, and ECO allow for customized comfort throughout the day.
The DELLA Mini Split is a high-efficiency SEER2 Energy Star heat pump. It features Hyper Heat technology down to -13°F, smart Alexa control, and whisper-quiet operation. With its award-winning 2025 Red Dot Design and a included 16.4ft install kit, this ductless system offers efficient, all-season comfort with indirect, soft airflow.
The smart Ducted Split Type Inverter Air Conditioner with heating function is powerful to quickly cool down / warm your home, office, garage or apartment for maximum comfort in quiet operation, perfect appliance in hot Summer or cold Winter. Comparing with others, machine featured with high 19.6 SEER2 grade, which means that it is more energy efficient and much money saving! This unit also has Sleep, Turbo, ECO, Mute and Timer functions and the device can easily be controlled and adjusted from the wired controller, APP control & Remote control. These functions help you enjoy the true individual comfort!
Pre-charged with R32 refrigerant. Includes 16.4ft installation kit. Energy Star certified.Experience powerful, energy-efficient comfort with the DELLA Serena 12000 BTU Mini Split AC & Heat Pump. With 22 SEER2 performance, 1 ton capacity, and inverter technology, it cools and heats rooms up to 550 sq.ft. Smart features include WiFi & voice control via Alexa/Google and the DELLA app. PureClean tech keeps air fresh, while the bottom heater ensures reliable winter use.
Specs
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.
Customers often buy these together
More to consider
Winado 9500 BTU Smart WIFI Ducted Mini Split AC/Heating System with Inverter, 19.6 SEER2 Concealed Duct Air Conditioner
$829.99The price was $1,659.99Costway 9000 BTU 19 SEER2 115V Mini Split Air Conditioner & Heater with Heat Pump & Installation Kit
$513.99The price was $959.98
Innovate your everyday Sponsored
Costway 9000 BTU Split Air Conditioner & Heater Wall Mount AC Unit with Remote Control
$479.49The price was $889.98Costway 17000 BTU Wifi Enabled Mini Split Air Conditioner & Heater Works with Alexa
$639.99The price was $1,159.98Costway 18k BTU 2 Zone 9k + 9k BTU Mini Split Air Conditioner 22 SEER2 208-230V Wifi Enabled
$1,318.99The price was $2,629.98
Discover related products
SIMZLIFE 130 Can Beverage Refrigerator and Cooler with Glass Door for Home, 17.3 in D, 31.3 in H, 3.2 cubic feet
$199.99The price was $209.99Ecozy Nugget Ice Maker Countertop with Handle, 33 lbs Per Day with Ice Bags and Scoop
$139.99The price was $299.99Costway 42 Inches Ultra-Thin Electric Fireplace Wall-Mounted & Recessed Fireplace Heater
$189.99The price was $349.98Waykar 150 Pint Energy Star Dehumidifier with Bucket and Auto Defrost 7,000 Sq. Ft. for Bedroom and Basement
$219.99The price was $279.99Ninja Foodi 10-in-1 Digital Air Fry Oven, Toaster, Flip-Away Storage, Dehydrate, Keep Warm
Black Friday Deal$80.99The price was $169.99Ninja DualBrew XL Hot & Iced Coffee Maker, Single-Serve, Compatible with K-Cups & 14-Cup Drip Coffee Maker
$79.95The price was $159.99
Keep exploring
Costway 12000 BTU Mini Split Air Conditioner & Heater 20 SEER2 115V with Heat Pump, Full Installation Kit
$529.99The price was $1,089.98Costway 18000 BTU Mini Split Air Conditioner & Heater 25 SEER2 208-230V AC Unit
$1,049.99The price was $1,889.98Costway 9000 BTU 20 SEER2 115V Wifi Enabled Mini Split Air Conditioner & Heater with Installation Kit
$499.99The price was $899.98Costway 18000 BTU Mini Split Air Conditioner & Heater with Heat Pump, Full Installation Kit
$799.99The price was $1,399.98Costway Blast Pro 2 Zone 20000 BTU Mini Split AC/Heating System, 23 SEER2, WiFi Enabled
$1,199.99The price was $2,159.98Lithzen 12000 BTU Mini Split AC/Heating System with 1 Ton Heat Pump & Installation Kit 115V
$429.99The price was $779.99Costway 12000 BTU Mini Split Air Conditioner, 21 SEER2 208-230V Inverter AC Unit Cools Rooms up to 750 Sq. Ft
$509.99The price was $919.98Costway 17000 BTU Wifi Enabled Mini Split Air Conditioner & Heater Works with Alexa
$639.99The price was $1,159.98Costway Blast Pro 2 Zone 20000 BTU Mini Split AC/Heating System, 23 SEER2, WiFi Enabled
$1,239.99The price was $2,239.98Costway 18k BTU 2 Zone 7k + 7k BTU Mini Split Air Conditioner 22 SEER2 208-230V Wifi Enabled
$1,299.99The price was $2,259.98
