LG LW1017ERSM1 10,000 BTU Smart Window AC Review: ThinQ, Quiet
A 10,000 BTU smart window air conditioner for rooms up to 450 sq. ft. with LG ThinQ app, Alexa and Google Assistant control, a remote, 24-hour timer, 4-way air deflection and an EZ Mount kit.
By Daniel Brooks
Updated October 8, 2026
The LG LW1017ERSM1 10,000 BTU Smart Window Air Conditioner is a Wi-Fi unit for medium to large rooms up to 450 square feet. It adds LG ThinQ app control and Amazon Alexa and Google Assistant support to a fixed-chassis window unit. It is a popular smart option among conventional window air conditioners, with 4.1 stars from 289 ratings.
It suits a living room, large bedroom or home office. The decision comes down to whether you value app control and whether your window and lifting help can handle a 57.3 pound unit. We evaluated it based on the manufacturer’s specifications.
Our Verdict
This LG is a well-rounded smart pick for a medium to large room. Its strongest points are ThinQ app control, Alexa and Google Assistant support, a full-featured remote, 3 cooling and fan speeds, a 24-hour timer, 4-way air deflection, Auto Restart, a slide-out filter with a Clean Filter Alert and a complete EZ Mount installation kit.
The trade-offs are weight and features. At 57.3 pounds, a second person is needed for installation, and there is no inverter or heat mode. LG says it runs as low as 50 dB in low mode, while the specifications list 52 dB. If you want connected cooling for a room up to 450 square feet, it is worth considering.
LG 10,000 BTU Smart Window Air Conditioner
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | LG |
| Model | LW1017ERSM1 |
| Type | Smart window air conditioner, fixed chassis |
| Cooling Capacity | 10,000 BTU |
| Room Size (listed) | Up to 450 sq. ft. |
| Efficiency | 11.4 (listed as SEER) |
| Noise Level | 52 dB (specification); as low as 50 dB in low mode (manufacturer) |
| Voltage / Power | 115V, 820W, 60 Hz |
| Window Fit | Double-hung, 22″ to 36″ wide, 13″ high |
| Dimensions | 19.37″D x 19.57″W x 12.36″H |
| Weight | 57.3 pounds |
| Fan Speeds | 3 cooling and fan speeds |
| Airflow | 4-way air deflection |
| Smart Controls | LG ThinQ app, Alexa, Google Assistant, remote |
| Timer | 24-hour on/off |
| Compressor | Scroll, no inverter |
| Refrigerant | R-32 |
| Warranty | 1 year |
Cooling Capacity and Room Size
LG rates the LW1017ERSM1 at 10,000 BTU for medium to large rooms up to 450 square feet. That covers most apartment living rooms, a large primary bedroom or an open home office.
The 4-way air deflection helps distribute cool air evenly, which matters more in a larger room than in a small bedroom. As always, a room near 450 square feet with high ceilings or heavy sun will need the unit to run longer.
If your room is well under 400 square feet, consider a smaller unit. An oversized AC cools quickly and shuts off before removing much moisture, which can leave a bedroom feeling cool but clammy.
ENERGY STAR publishes this general guide for sizing a room air conditioner by floor area:
| Room Size (sq ft) | Cooling Capacity (BTU/hr) |
|---|---|
| 100 to 150 | 5,000 |
| 150 to 250 | 6,000 |
| 250 to 300 | 7,000 |
| 300 to 350 | 8,000 |
| 350 to 400 | 9,000 |
| 400 to 450 | 10,000 |
| 450 to 550 | 12,000 |
| 550 to 700 | 14,000 |
| 700 to 1,000 | 18,000 |
Adjust for your room: reduce capacity by 10 percent for a heavily shaded room, increase it by 10 percent for a very sunny room, add 600 BTU for each regular occupant beyond two, and add 4,000 BTU if the unit cools a kitchen. Source: ENERGY STAR.
At its listed 10,000 BTU, it lines up with rooms of about 400 to 450 square feet, which matches LG’s coverage claim.
Installation and Fit
The fixed chassis installs in a double-hung window from 22 to 36 inches wide and 13 inches high, using the included EZ Mount kit. The kit is unusually complete: 2 foam-PE pieces, a foam strip, a curtain panel, 2 heatproof foam pieces, 2 frame guides, a window locking bracket, 2 sill supports, screws, bolts and lock nuts.
The cabinet is 19.37 inches deep, 19.57 inches wide and 12.36 inches tall, and weighs 57.3 pounds. Plan on two people: one to hold the unit and one to fasten it. Use the sill supports and locking bracket as the manual describes so the unit is fully secured, and plug it into a standard 115V outlet.
Noise, Energy Use and Efficiency
LG says the unit runs as low as 50 dB in low mode, and the specifications list 52 dB. Either way, it is reasonably quiet for a 10,000 BTU unit and suitable for a bedroom on the lower fan speed.
The listing gives an efficiency figure of 11.4, labeled as SEER, and a power draw of 820 watts. The scroll compressor has no inverter, so it cycles on and off. The 24-hour timer and app scheduling help limit running time to when the room is in use.
Controls and Smart Features
LG ThinQ lets you control the unit from your phone, so you can start cooling before you get home or adjust the temperature from another room. It is also compatible with Google Assistant and Amazon Alexa for voice commands.
On the unit, an LED display and simple control panel handle temperature and fan speed, and the full-featured remote works from across the room. You get 3 cooling and fan speeds, a 24-hour on/off timer and 4-way air deflection. Auto Restart brings the unit back with its previous settings after a power outage.
App scheduling is especially useful for a living room that sits empty during the workday. Instead of leaving the unit running, you can start it from your phone on the way home, and anyone in the household can control it from their own device.
Maintenance and Drainage
The slide-out washable filter captures dust, and LG recommends cleaning it every 30 days. A Clean Filter Alert reminds you when it is due.
The listing does not describe condensate drainage. Check the manual for how water is handled and for the steps to remove and store the unit at the end of the season.
Pros and Cons
| Pros | Cons |
|---|---|
| LG ThinQ app with Alexa and Google | Heavy at 57.3 pounds |
| Remote, 24-hour timer and Auto Restart | No inverter compressor |
| 4-way air deflection | No heat mode |
| Complete EZ Mount kit with sill supports | Not for windows under 13″ high |
| Clean Filter Alert and slide-out filter |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Living rooms and large bedrooms up to 450 sq. ft. | Small bedrooms that need less capacity |
| Smart home users with Alexa or Google | Buyers set on an inverter compressor |
| Buyers who want both app and remote | Anyone installing alone |
| Double-hung windows 22″ to 36″ wide | Buyers who need heating |
| Homes with a standard 115V outlet | Casement or sliding window owners |
Final Verdict
The LG LW1017ERSM1 10,000 BTU Smart Window Air Conditioner combines ThinQ app control, Alexa and Google Assistant support, a remote, 24-hour timer and 4-way air deflection with a complete EZ Mount kit. It suits a living room or large bedroom up to 450 square feet. The compromises are a 57.3 pound weight and the lack of an inverter. You can check the current price and details for the LG LW1017ERSM1 10,000 BTU Smart Window Air Conditioner, or compare other 10,000 BTU window air conditioners.
Frequently Asked Questions
Can I control the LG LW1017ERSM1 with my phone?
Yes. LG ThinQ lets you control it from your mobile device, and it is compatible with Amazon Alexa and Google Assistant.
What window size does it fit?
It fits double-hung windows from 22 to 36 inches wide and 13 inches high, using the included EZ Mount kit.
How quiet is it?
LG says it runs as low as 50 dB in low mode, and the specifications list 52 dB.
How often should I clean the filter?
LG recommends cleaning the slide-out filter every 30 days, and a Clean Filter Alert reminds you.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.