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You need the best LG window air conditioners with heater to handle cooling and warming efficiently. The LG 18,000 BTU Window Air Conditioner with Heat leads this list because its 18,000 BTU capacity suits large rooms with 230V power. We compared 2 models strictly by the specifications published on the listings. This approach ensures you get accurate data on size, voltage, and control methods. You can use this guide to decide which unit fits your room dimensions and electrical setup.
Check your outlet voltage first
All LG window ACs with heater in this list require 230V power. You must have a compatible outlet before buying. The top picks offer 18,000 BTU cooling and heating for large rooms. One model adds Wi-Fi app control for remote operation. Verify your electrical setup matches these specs to ensure the unit fits your space and power source.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | LG 18,000 BTU Window Air Conditioner with Heat Best overall | large rooms with 230V power | |
| 2 | LG 18,000 BTU Window AC with Heat Best wi-fi | rooms up to 1,000 sq ft with 230V power |
The best fit for you
- You need to cool a large 1,000 square foot room – LG 18,000 BTU Window Air Conditioner with Heat – Its 18,000 BTU capacity handles spaces up to 1,000 square feet effectively.
- You require smart app and voice control for convenience – LG 18,000 BTU Window AC with Heat – It supports Wi-Fi, app control, and voice commands via Alexa integration.
- You have a 230V outlet for high-power appliances – LG 18,000 BTU Window Air Conditioner with Heat – It operates on 230V power, matching your specific electrical setup.
LG 18,000 BTU Window Air Conditioner with Heat
Best for: large rooms with 230V power
- Operating Mode
- Heater
- Cooling Capacity
- 18,000 BTU
- Coverage Area
- up to 1,000 sq ft
- Control Method
- Remote, digital control panel
- Voltage
- 230/208V
- Operating Modes
- Cooling, heating, fan
The LG 18,000 BTU Window AC with Heater cools rooms up to 1,000 square feet. It includes supplemental heating for cooler days. This unit requires a 230/208V power connection. You get two fan speeds for cooling, heating, and fan modes. A remote control and digital panel help you adjust settings. The 126-pound unit fits bedrooms, living rooms, and basements. Auto restart turns it back on after power failures.
- Cools rooms up to 1,000 square feet
- Includes supplemental heating for cooler weather
- Remote control and digital panel for easy use
- Auto restart function after power outages
- Requires a special 230/208V LCDI plug (NEMA 6-20)
- Weighs 126 pounds, making it bulky to move
- Limited to two fan speeds for all modes
- You need a unit for rooms up to 1,000 square feet
- You have a 230V electrical outlet available
- You want supplemental heating for cooler days
- You only have standard 115V outlets
- You need to cool spaces larger than 1,000 square feet
- You prefer a lighter unit that is easy to install alone
Verdict: LG 18,000 BTU Window AC with Heater suits you if you have a 230V outlet and need to cool a 1,000 square foot room with added warmth. It handles bedrooms and living rooms well. The heavy build and specific plug requirement are the main trade-offs.
LG 18,000 BTU Window AC with Heat
Best for: rooms up to 1,000 sq ft with 230V power
- Operating Mode
- Heater
- Cooling Capacity
- 18,000 BTU
- Coverage Area
- 1,000 sq ft
- Control Method
- App, Remote, Voice, Electronic
- Voltage
- 230V
- Fan Speeds
- 2
This LG window unit provides 18,000 BTU of cooling and heating for rooms up to 1,000 square feet. It runs on 230V power and includes Wi-Fi connectivity for remote management via the ThinQ app. You can also use voice commands with Alexa or Google Assistant. The unit features a remote control, electronic controls, and an auto-restart function. It weighs 132 pounds and measures 30.5 inches in length.
- 18,000 BTU cooling and heating capacity
- Wi-Fi control via LG ThinQ app
- Voice control with Alexa and Google
- Includes remote control for local operation
- Auto-restart function after power failure
- Heavier build at 132 pounds compared to lighter models
- Requires 230V electrical connection, not standard 110V
- Limited to two fan speeds for cooling and heating
- You need Wi-Fi control for your window unit
- You have a 230V outlet available for installation
- You want voice control integration with smart home assistants
- You only have standard 110V outlets
- You prefer a lighter unit for easier installation
- You need more than two fan speed options
Verdict: LG 18,000 BTU Window AC with Heater offers robust smart features and heating capability for medium to large rooms. It is ideal for users with 230V power and a preference for app or voice control.
Specifications side by side
| Spec | LG 18,000 BTU Window Air Conditioner with Heat | LG 18,000 BTU Window AC with Heat |
|---|---|---|
| Cooling Capacity | 18,000 BTU | 18,000 BTU |
| Coverage Area | up to 1,000 sq ft | 1,000 sq ft |
| Control Method | Remote, digital control panel | App, Remote, Voice, Electronic |
| Voltage | 230/208V | 230V |
| Operating Modes | Cooling, heating, fan | – |
| Fan Speeds | 2 | 2 |
| Room | Bedrooms | – |
| Features | Timer, 24-Hour Timer, Remote | Remote |
| Room Type | Bedroom, Living Room, Apartment, Basement | – |
| Color | Bright White | Bright White |
| Size | 18,000 BTU | 18,000 BTU |
| Operating Mode | Heater | Heater |
| Smart Compatibility | – | Alexa |
| Dimensions | 30.5 × 25.5 × 16.8 inches | 30.5 × 25.5 × 16.8 inches |
| Weight | 126 pounds | 132 pounds |
| Model | LW1823HR | LW1823HRSM |
How to choose the right LG window AC with heater
Match BTU to room size
You need enough cooling power for your space. Both models offer 18,000 BTU capacity. This rating suits large rooms up to 1,000 square feet. If your area is smaller, you might waste energy. If it is larger, the unit will struggle. Check your room dimensions before buying. The 18,000 BTU rating ensures effective temperature control for bedrooms and living rooms. Verify your square footage matches this high output to avoid underperformance or inefficiency.
Check voltage compatibility
You must have the correct electrical outlet. Both LG models require 230V power. Standard 110V outlets will not work. You need a dedicated 230V circuit for safe operation. This is a critical safety and functionality requirement. If your home lacks this outlet, you cannot use these units. Check your electrical panel or consult an electrician. Do not attempt to adapt the plug. The voltage requirement is non-negotiable for these high-capacity window units.
Select your control method
You can choose between remote or smart control. The LW1823HR uses a standard remote control. It is simple and reliable. The LW1823HRSM adds Wi-Fi and app control. You can manage it from your phone. It also supports voice commands via Alexa. If you prefer convenience, choose the Wi-Fi model. If you want simplicity, the remote-only version works well. Consider how often you adjust settings. Smart features add complexity but offer remote access.
Consider smart home integration
You might want voice control for convenience. Only the LW1823HRSM supports Alexa integration. This allows you to adjust temperature using voice commands. It is useful if you already use smart speakers. The other model lacks this capability. You control it only via the remote. Decide if voice commands matter to you. If you do not use smart home devices, the standard remote is sufficient. Smart features add value only if you actively use them.
Verify physical dimensions
You must ensure the unit fits your window. Both models share similar dimensions. They are 30.5 inches wide, 25.5 inches deep, and 16.8 inches high. The LW1823HRSM weighs 132 pounds. The LW1823HR weighs 126 pounds. Both are heavy. Check your window sill strength. Measure your opening carefully. The width is standard for large units. Ensure your window frame can support the weight. Proper fit prevents air leaks and ensures stability.
Frequently asked questions
Which LG window AC with heater has Wi-Fi?
The LG 18,000 BTU Window AC with Heat (model LW1823HRSM) includes Wi-Fi capabilities. It supports app control and voice commands via Alexa. This allows you to manage settings remotely. The standard 18,000 BTU model (LW1823HR) lacks these smart features and relies on a remote control.
What is the difference between the two LG models?
The main difference is connectivity. The LW1823HRSM model adds Wi-Fi, app control, and Alexa voice control. The LW1823HR model offers only a remote control. Both share the same 18,000 BTU capacity, 230V power requirement, and heating function. The Wi-Fi model is slightly heavier at 132 pounds versus 126 pounds.
Do LG window ACs with heater need 230V power?
Yes, all LG window air conditioners with heater in this list require 230V power. You must have a compatible outlet before installing either model. These units are designed for high-capacity cooling and heating, which demands higher voltage than standard 115V outlets provide.
How large of a room can these units cool?
Both models provide 18,000 BTU of cooling power. This capacity is suitable for large rooms up to 1,000 square feet. They handle spaces like bedrooms, living rooms, apartments, and basements effectively. Ensure your room size aligns with this capacity for optimal performance.
What features do LG window ACs with heater include?
Both models feature heating mode, a 24-hour timer, and a remote control. The Wi-Fi-enabled model (LW1823HRSM) adds app control and voice compatibility with Alexa. These features allow you to schedule operation and adjust settings from a distance or via voice commands.
Are LG window ACs with heater heavy?
Yes, these units are substantial. The standard 18,000 BTU model weighs 126 pounds. The Wi-Fi model weighs 132 pounds. Their dimensions are approximately 30.5 inches long, 25.5 inches wide, and 16.8 inches high. You may need assistance for installation due to the weight and size.