Best 18000 Btu Air Conditioners in 2026

ALEXA ENABLED: Use voice or app control to control your air conditioner from anywhere. Use routines to adjust temperature settings while you are away and enjoy energy savings of up to 40%.

4-IN-1 MINI SPLIT SYSTEM: With air conditioning, built-in heat pump (up to 5F/-15C), dehumidifier, fan and turbo function. DC Inverter, UL Listed, AHRI Certified, Works with Alexa

DESIGNED FOR HOME & BUSINESS: Powerful performance and dependable durability with high quality design for an attractive appearance. Great for bedrooms, additions, living rooms, and even commercial applications like stores, restaurants and warehouses.

Reliable Air Conditioning: Keystone proudly produces consistent cooling to provide you comfort even on the hottest days; Our powerful 18,000 BTU window air conditioner is what you need to efficiently cool your apartment, bedroom, garage or any larger sized room up to 1000 Sq.Ft.

Maximum Comfort: Featuring 3 cooling modes, 3 fan speeds, 4-way adjustable air louvers and a programmable timer; Aside from cooling, 3.8 pints of moisture from the air is removed every hour with the efficient built-in dehumidification system

Smart Remote Control: The remote control takes the temperature of the room you are in, displays it on the LCD screen and sends a signal to your AC unit every 3 minutes for accurate cooling, no matter where you are in your home

Save money all year-round with a highly efficient ductless mini split inverter+ heat pump system

Ultra-silent and beautifully built: perfect for home or light commercial use

Use for both cooling and heating: 18000 BTU/hour, with 19 SEER and 10 HSPF efficiency

Enjoy year round comfort with the ability to heat or cool your room or space. This unit can continue to heat in ambient temperatures as low as -4 degrees Fahrenheit.

The Blue Series III comes with an all in one installation kit which includes an indoor unit, outdoor unit, remote control, 12' copper linset, 15' signal cables, and 15' power electrical cables.

Manufacturers are constantly working to improve the quality and efficiency of our products. Therefore, we send the most revised model to our customers. This may result in slight differences in models received.

Energy Star Certified- This air conditioner has met the high standards of the ENERGY STAR Program using energy-efficient technologies that translate into electricity savings.

Multiple Fan Speeds- 3 cooling and fan speeds with Auto Cool allow you to customize your cooling.

Maximum Usability- Easy to use electronic controls with remote

[ENERGY EFFICIENT COOLING] This 18000 BTU/h, 19 SEER, 208-230V, ETL Listed, AHRI Certified pre-charged air conditioner unit features a ductless mini split inverter plus system with a heat pump (up to 5℉/-15℃) and DC Inverter technology provides up to 30% power savings.

[AMPLE COVERAGE] This unit provides cooling and heating for up to 1000 Sq. Ft and able to work in environments as low as 5 degrees Fahrenheit. Full installation kit included.

[STRONG SYSTEM] This air conditioner is designed with several smart functions that make it easy to use: 4D air flow(up-down left-right), I feel mode, 24 hour timer, sleep mode, eco energy saving mode, multiple fan speeds, turbo function, heating, cooling, dry and auto modes. Maximum Fuse Size is 20A.

Energy Star Certified- This air conditioner has met the high standards of the ENERGY STAR Program using energy-efficient technologies that translate into electricity savings.

Multiple Fan Speeds- 3 cooling and fan speeds with Auto Cool allow you to customize your cooling.

Maximum Usability- Easy to use electronic controls with remote

( Inverter Technology)Energy Efficient - 12000 BTU, 16.5 SEER, 115V/60Hz, 9.4 HSPF, Cooling and Heating up to 550 sq ft , AHRI Certified & UL Certified (Includes about 11 FT Line Set), Low Noise – operating on a 27.5 dB noise level

5 Modes for Your Comfort – You can choose among Auto, Cool, Dry, Heat, and Fan modes. All these modes are easily controllable via the backlit LCD remote!

Pre-Charged R-410A, Cooling to 62℉、Heating to 86℉, Indoor working temperature (cooling 62～90℉/ heating 32～86℉)， Outdoor working temperature(cooling 5～122℉/ heating 5～86℉)

Cooper&Hunter Sophia Series High efficiency Dual Zone Ductless Mini Split Heat Pump System featuring 28,000 BTU Inverter Outdoor Condenser 22 SEER with 12,000 BTU and 18,000 BTU Wall Mount Air Handlers

Uses 208-230V, ETL Intertek Approved, Energy Star Certified, AHRI Certified

Works for heating with ambient temperature up to -13F°

DC Inverter Technology for Ultra High Efficiency and Performance

High Quality Design for an Attractive Appearance, Powerful Performance,and Dependable Durability

Uses 208-230V, ETL Intertek Approved, Energy Star Certified, AHRI Certified

Cooper&Hunter Sophia Series 28,000 BTU Multi Zone Outdoor Condenser 22 SEER, 230V, with (2) Wall Mount Air Handlers 9,000 BTU + 18,000 BTU

WiFi Ready (additional adapter required), ETL Intertek Approved, Energy Star Certified, AHRI Certified

Includes Hi-Grade Installation Kits 1/4"-3/8" and 1/4"-1/2", with 25ft Pre-Flared and Insulated Copper Line Set, Communication Wires, Small Accessories and a Drainage Extension.

SMART WIFI CONTROL – Home or away, you’re in charge with the Friedrich Go App. Integrated Wi-Fi control from your smartphone and voice command compatibility make this fan efficient and easy to use. Sync your unit with Amazon Alexa or Google Home for ultimate convenience.

POWERFUL COOLING AND HEATING – Running up to 25% quieter than other units on the market, this air conditioner is constructed with heavy-duty insulation and stiffened sheet metal casing for optimal sound absorption. An electric heat strip provides warm air fast, making this model ideal for those rooms that are always ‘too cold in winter’.

EASY INSTALLATION  – Chill Premier CEW models are designed with a slideout chassis for more permanent installation and easier access for maintenance. Easily mount it in your window or replace an old in-wall unit. Compatible with windows and walls, this powerful unit has a cooling BTU of 18,000 and heating BTU of 10,600.  Standard installation hardware is included. Height: 18  Width: 23 7/8  Depth: 25 3/8

SMART WIFI CONTROL – Home or away, you’re in charge with the Friedrich Go App. Integrated Wi-Fi control from your smartphone and voice command compatibility make this fan efficient and easy to use. Sync your unit with Amazon Alexa or Google Home for ultimate convenience.

QUIET YET POWERFUL – Running up to 25% quieter than other units on the market, this air conditioner is constructed with heavy-duty insulation and sheet metal casing for optimal sound absorption. Compatible with windows and walls, this powerful unit cools spaces quickly and quietly.

EASY INSTALLATION – Chill Premier CCW models are designed with a slideout chassis for more permanent installation and easier access for maintenance. Easily mount it in your window or replace an old in-wall unit. Standard window installation hardware is included. Height: 18 Width: 23 ⅞ Depth: 25

Smart Phone Control - LG ThinQ App lets you control your air conditioner from anywhere using your smartphone, Google Assistant or Amazon Alexa

Low Noise Performance - LG window air conditioners operate at sound levels as low as 52dB (in low mode) eliminating unnecessary noise

Energy Star Certified - This air conditioner has met the high standards of the ENERGY STAR Program using energy-efficient technologies that translate into electricity savings

Ultra-high efficiency inverter++ ductless multi split dual (2) zone heat pump system

ENERGY STAR certified and Wi-Fi enabled with free Smartphone app (Pioneer Airlink)

17,000 Cooling BTU/H (range: 5,100 minimum - 18,700 maximum) with 22 SEER/12.5 EER efficiency

YMGI Tri Zone Ductless Mini Split System offer total 42,000 BTU output with three Ceiling mount indoor handlers at 12000 BTU and 18000 BTU

ADVANCE HEAT PUMP TECHNOLOGY Enable this system for Cooling Heating and Dehumidification for One Zone, Two Zones or All Zones

POWER BY DC INVERTER COMPRESSOR rate this system at 21 SEER efficiency which maximize your investment for the long term

Ecotech Supplies presents this YMGI Dual Zone Ductless Mini Split System offer total 18,000 BTU output with Two Ceiling Suspension mount indoor handlers at 9000 BTU each

ADVANCE HEAT PUMP TECHNOLOGY Enable this system for Cooling Heating and Dehumidification

POWER BY DC Inverter COMPRESSOR rate this system at 22 SEER efficiency which maximize your investment for the long term

YMGI 54000 BTU 5 Ton 3 Zone Ductless Mini Split System with 3 Indoor Ceiling Cassette (3x 18000) with copper Linesets and Wire

ADVANCE HEAT PUMP TECHNOLOGY Enable this system for Cooling Heating and Dehumidification with greatest efficiency so it saves you Big in Power Bills for every Summer and Winter

POWER BY World Class DC inverter Compressor rate this system at 21 SEER efficiency which maximize your investment for the long term with low ambient outdoor temperature as low as -4 For Heating

ULTRA QUIET - The U-shape design of Midea U Smart Inverter AC uses your window to block noise outside. The highly-efficient inverter system warrants ultra-low noise and vibration, 9x quieter than traditional units with operation as low as 32 dBA.Cooling Watts : 890W. Rated Cooling Amps (AHAM) : 9.97

MORE THAN 35% ENERGY SAVINGS - With the advanced DC Inverter technology, Midea U achieves over 35% energy savings compared to other traditional units. It is the first window AC to obtain the ENERGY STAR Most Efficient Certification

SMART CONTROL - Midea U Smart Inverter AC is Wi-Fi enabled and can be controlled from anywhere using the MSmartHome app on iOS or Android. You can also use voice commands throughout your house, office, or apartment using Alexa or Google Assistant devices

[Maximum Cooling] Cooling Coverage up to 260 Square ft. is ideal for cooling small rooms with 5,800 BTU window air conditioner for 1 room or space

[MAXIMUM USABILITY] With the user friendly panel and remote control, you can operate window air conditioners with LCD display and simple selection control panel, up/down temperature adjustments, and fan speed selection, using the full-featured remote without leaving your bed, workspace or couch.

[Easy Installation & Cleaning] This AC has a fixed chassis and installs easily in a double hung window with included EZ Mount installation kit; slide-out filter makes cleaning a breeze to keeps your unit running its best when cleaned every 30 days