When it comes to maintaining a comfortable home environment, flexibility is key. Many households face the challenge of needing both cooling in the summer and heating in the winter. Instead of buying separate units, the LG LW1223HRSM Smart Window Air Conditioner & Heater offers a two-in-one solution designed for year-round climate control.
With its powerful cooling and heating functions, modern smart technology, and easy-to-use design, this model is tailored for homeowners and renters who want efficiency, convenience, and performance in a single appliance. In this review, we’ll cover the features, specifications, design, performance, advantages, drawbacks, and who it’s best suited for.
Key Features of the LG LW1223HRSM
- Cooling and Heating in One Unit
The LW1223HRSM combines an air conditioner and heater, making it a true 4-season appliance. It cools rooms during hot months and provides supplemental heating when temperatures drop. - 12,000 BTU Cooling Power
With 12,000 BTUs, this unit delivers reliable cooling performance for medium to large rooms, handling spaces of up to 550 square feet with ease. - 11,200 BTU Heating Capacity
The built-in heater is strong enough to provide supplemental warmth, reducing the need for standalone heaters in bedrooms, living rooms, or office spaces. - Smart Technology with LG ThinQ
The unit is Wi-Fi enabled and compatible with the LG ThinQ app, allowing users to control settings remotely from their smartphone. It also works with Amazon Alexa and Google Assistant, bringing voice-control convenience. - Multiple Operating Modes
Apart from cooling and heating, the appliance includes fan-only and dehumidifier modes, making it versatile for different weather conditions. - Energy Efficiency and Timer Functions
With an Energy Efficiency Ratio (EER) of 10.7, this model balances strong performance with reasonable power consumption. The programmable timer and energy saver mode help lower electricity usage further. - User-Friendly Remote and LED Display
An included remote control and digital LED panel make it easy to adjust temperature, fan speeds, and modes without hassle.
Specifications
- Brand: LG
- Model: LW1223HRSM
- Cooling Capacity: 12,000 BTU
- Heating Capacity: 11,200 BTU
- Coverage Area: Up to 550 sq. ft.
- Functions: Cooling, Heating, Fan, Dehumidifier
- Smart Features: Wi-Fi enabled, LG ThinQ app, Alexa & Google Assistant compatible
- EER (Energy Efficiency Ratio): 10.7
- Controls: Remote + digital LED display
- Timer: 24-hour programmable
- Noise Level: Approx. 55 dB (moderate)
- Dimensions: 23.6” x 22.2” x 15.0”
- Weight: ~93 lbs
- Installation Type: Window-mounted
- Filter: Washable, reusable air filter
Design and Build Quality
The LG LW1223HRSM combines functionality with a modern, clean look. Its white exterior with a compact rectangular design blends well with most home interiors, whether placed in a bedroom or living room. The unit is sturdy and built to handle long-term operation, weighing in at around 93 pounds—heavier than portable units but typical for a window AC of this size.
The LED display panel on the front is intuitive and responsive, while the remote control provides additional convenience. The inclusion of smart technology elevates the design, allowing for control beyond the traditional manual and remote operation.
As a window-mounted unit, installation requires proper fitting into a standard-sized window. While heavier than portable units, once installed it becomes a reliable fixture for year-round comfort.
Performance and Efficiency
Performance is the highlight of this model. With 12,000 BTUs of cooling power, it easily handles medium-to-large rooms, bringing temperatures down quickly even during peak summer heat. The 11,200 BTU heating function is equally impressive, offering strong supplemental warmth without the need for space heaters.
The dual functionality makes it stand out as a practical option for households that experience both hot summers and chilly winters. Users benefit from a single appliance managing multiple needs.
Energy efficiency is bolstered by its 10.7 EER rating, ensuring a balance between performance and electricity usage. The energy saver mode, sleep mode, and 24-hour timer help optimize consumption further, making it cost-effective for long-term use.
Noise levels are moderate, averaging around 55 dB. While not whisper-quiet, it is comparable to a normal conversation and generally acceptable for bedrooms or living areas.
The smart features are particularly beneficial for modern households. With the LG ThinQ app, you can control the unit remotely, set schedules, and monitor energy usage. Voice control through Alexa and Google Assistant adds another layer of convenience.
Pros and Cons
Pros
- 2-in-1 functionality with both cooling and heating.
- Powerful 12,000 BTU cooling and 11,200 BTU heating capacity.
- Smart controls with LG ThinQ app, Alexa, and Google Assistant compatibility.
- Multiple modes: cooling, heating, fan, and dehumidifier.
- Energy-efficient with EER of 10.7.
- 24-hour timer and sleep mode for cost savings.
- Durable design with washable filter for easy maintenance.
Cons
- At ~93 lbs, the unit is heavy and requires effort to install.
- Noise levels may be noticeable for light sleepers.
- Requires a window for installation, limiting placement flexibility.
- Not as portable as floor-standing air conditioners.
Who Is It Best For?
The LG LW1223HRSM Smart Window Air Conditioner & Heater is ideal for:
- Homeowners or renters in regions with hot summers and cold winters, who need year-round comfort in one appliance.
- Medium-to-large room users (up to 550 sq. ft.) looking for efficient cooling and heating.
- Smart home enthusiasts who want Wi-Fi control and voice assistant compatibility.
- Energy-conscious households wanting a balance of performance and efficiency.
- Families in humid climates, thanks to the dehumidifier function that keeps air fresh.
It may not be suitable for those who want a lightweight or portable unit, or for individuals who need ultra-quiet operation in sleeping spaces.
Final Verdict
The LG LW1223HRSM Smart Window Air Conditioner & Heater is a standout choice for anyone seeking a dual-function, smart-enabled climate control system. With 12,000 BTUs of cooling power, 11,200 BTUs of heating, and compatibility with modern smart home systems, it offers both performance and convenience.
While heavier and noisier than portable models, its year-round functionality, energy efficiency, and smart features make it an excellent investment for medium-to-large rooms.
If you’re looking for a reliable all-in-one solution for cooling and heating, the LG LW1223HRSM delivers comfort, technology, and efficiency in one well-designed package.