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LG - 1,000 Sq. Ft. 18,000 BTU 230V Smart Window Air Conditioner - White

Model: LW1821ERSM
SKU: 6505626
Sold byBest Buy

Customers are saying

Customers consistently note the excellent cooling performance of the 1,000 Sq. Ft. 18,000 BTU 230V Smart Window Air Conditioner, with many praising its ability to effectively cool a space. However, a significant drawback mentioned by several customers is the unit's 230V voltage requirement, which is not compatible with standard wall outlets in many regions. This incompatibility was a source of frustration for some buyers. Clearer communication of the voltage specifications is suggested.

Generated by AI based on customer reviews.
Features
  • Total Remote Control

    Utilize LG ThinQ Technology to command your LG LW1821ERSM window air conditioner from anywhere, managing cooling, modes, and temperature adjustments even on the go with seamless compatibility with Amazon Alexa and Hey Google, for unmatched convenience.

  • Whisper-Quiet Operation

    Enjoy peaceful and undisturbed surroundings as the LG LW1821ERSM window air conditioner operates at remarkably low sound levels as quiet as 52dB in low mode, making it perfect for creating serene sleep and work environments.

  • Customized Airflow

    With 3 cooling and fan speeds combined with the Auto Cool feature, fine-tune the airflow of your LW1821ERSM to fit your specific requirements, ensuring personalized comfort at all times.

  • Energy-Saving Schedule

    Craft a tailored cooling schedule to cut down on energy expenses using the 24-hour on/off timer feature, offering proactive energy conservation without compromising on comfort.

  • Roomy Cooling Coverage

    The LG LW1821ERSM is designed to effortlessly cool large rooms up to 1,000 sq ft (25' x 40'), making it the ideal choice for bedrooms, offices, or any spacious area seeking consistent cooling performance.

  • Voltage Requirement

    This unit requires a special 230V electrical outlet and will not operate with a standard 115V outlet

See all features
Specifications
  • Recommended Room Size
    1000 square feet
    BTU Cooling Rating
    18000 british thermal units
    Number of Cool Settings
    3
    Number of Fan Speeds
    3
    Airflow Rate
    530 cubic feet per minute
    Remote Control
    Yes
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Reviews

Rating 2.9 out of 5 stars with 17 reviews

59% would recommend to a friend
Customers are sayingCustomers consistently note the excellent cooling performance of the 1,000 Sq. Ft. 18,000 BTU 230V Smart Window Air Conditioner, with many praising its ability to effectively cool a space. However, a significant drawback mentioned by several customers is the unit's 230V voltage requirement, which is not compatible with standard wall outlets in many regions. This incompatibility was a source of frustration for some buyers. Clearer communication of the voltage specifications is suggested.
This summary was generated by AI based on customer reviews.
  • Cooling Performance (7)

Customer Images

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

  • Rated 5 out of 5 stars

    Great cooling unit

    I've had this AC unit for more than 10 years. Im buying the same one once more for the reason that need another one. The one i have started to make loud noise but it cools even dow its more than ten years old. LG 18,000 btu AC unit has been good to me.

    Posted by Acunit18000btu

  • Rated 3 out of 5 stars

    Unable to use

    Haven’t been able to use requires special outlet. Does not use standard outlet we will have to have a new plug placed not even sure if the unit works yet. Seems like it will be a pretty powerful unit.

    Posted by Holmes

  • Rated 5 out of 5 stars

    Replacement unit

    Air conditioner is sleek. The controls are clearly marked and works directly from the front panel as well as the remote control. Unit is quiet and cools very well.

    Posted by Superstar

  • Rated 1 out of 5 stars

    Ac nightmare

    1st order received didn’t work and 2nd one was damaged. I’ve been trying to get this AAC since early June. Now I’m fed up and just returning it.

    Posted by Nightmare

  • Rated 1 out of 5 stars

    Says it comes with “window install kit” It doesn’t

    It stated it comes with a window install kit. It only comes with the side peices to enclose around the widnow. It does not come with the weight bearing bracket that goes below the window. Friedrich air conditioners come wiith the bracket. So LG is cutting corners and really shafting buyers who now have to search for brackets. So now in 95 degree weather with elderly relative have to figure out what type of brakcet to get. I can tell by how they answer questions here that they don’t really care.

    Posted by CreepingSausage

  • Customer reviews from lg.com

    Syndicated rating, 4.56 out of 5 stars with 25 reviews on lg.com.

    See all lg.com reviews
    lg.com
From the Manufacturer

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LG - 1,000 Sq. Ft. 18,000 BTU 230V Smart Window Air Conditioner - White
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Pros for LG - 1,000 Sq. Ft. 18,000 BTU 230V Smart Window Air Conditioner - White
Cooling PerformanceCooling Performance, Noise Level, Installation, QuietCooling Performance, Noise Level, Installation EaseCooling Performance, Noise Level, Ease of use, Size, BTU
Cons for LG - 1,000 Sq. Ft. 18,000 BTU 230V Smart Window Air Conditioner - White
There were no cons for this productBuild QualityThere were no cons for this productThere were no cons for this product

Specs

Questions & Answers
  • 110v or 220v

    Thank you for reaching us regarding LG Air Conditioner. The LG LW1821ERSM window air conditioner requires 230V or 208V power supply. It cannot be operated on a standard 110V/120V household outlet. You can download its owner's manual through this link for more information: https://www.lg.com/us/support/product/lg-LW1821ERSM.AT3AUSH. For additional assistance, please reach out to us on social media @LGUSSupport so we can help you further. ^Cris

    Answered by LG Digital Customer Care
    LG Digital Customer Care response
  • How can I turn off the filter red lights

    Hello, there! Thank you for sharing your question to us about the LG Window Air-Conditioner (LW1821ERSM). On this model, the red lights signal that the air filter needs to be checked or replaced. Once you’ve cleaned or replaced the filter, you can reset the indicator by: • Pressing and holding the Filter Reset button on the control panel for about 3 seconds until the light turns off. This ensures the unit recognizes the filter has been serviced and continues running efficiently. You can explore the full feature list and support details here: https://www.bestbuy.com/product/lg-1000-sq-ft-18000-btu-230v-smart-window-air-conditioner-white/J7G5655WCC. If you’d like more guidance or need help locating the reset button, feel free to email us at lgdigitalcare@lg.sprinklrsupport.com — Avril

    Answered by LG Digital Customer Care
    LG Digital Customer Care response
  • whats the voltage???

    Hi there! Thanks for reaching out about the LG LW1821ERSM window air conditioner. This model operates on standard 115 volts. If you have more questions or need further assistance, please send us a private message on our social media platform via @LGUSSupport. We're here to help! ^Sam

    Answered by LG Digital Customer Care
    LG Digital Customer Care response
  • Can I install this unit through the wall instead of thru the window?

    Hi, there! The LG 18,000 BTU Smart Wi-Fi Enabled Window Air Conditioner, model LW1821ERSM window air conditioner is designed specifically for window installation and is not intended to be installed through the wall. Installing it through the wall could lead to improper airflow and ventilation, affecting its performance and efficiency. For through-the-wall installations, you would need a different type of air conditioner specifically designed for that purpose, such as a wall-mounted or through-the-wall air conditioner. These units have a different form factor and typically come with a rear or side vent to expel the hot air outdoors. If you are looking for an air conditioner for a through-the-wall installation, make sure to select a model that is explicitly labeled and designed for this type of setup. Installing the wrong type of air conditioner could lead to safety hazards and performance issues. You can visit this link for our Through the Wall Air Conditioning units: https://www.lg.com/us/wall-air-conditioners For further inquiries, you can reach out to us by sending us a private message through @LGUSSupport on Facebook or Twitter. ^Danee

    Answered by LG Digital Customer Care
    LG Digital Customer Care response
  • Do you carry one that’s air only and price

    Hi! Sorry for the confusion; we're not certain what you mean by air only, but if you're referring to portable ACs, we do have a line! We've attached a link below, and if this isn't what you were looking for, please be sure to reach out with the second link, and it'll be our pleasure to help. https://www.lg.com/us/portable-air-conditioners https://www.lg.com/us/support/contact ^Ian

    Answered by LG Digital Customer Care
    LG Digital Customer Care response
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