LG LW8017ERSM Smart Window AC: The Complete Buying Guide

Overview & Design

At first glance, the LG LW8017ERSM looks like a premium window AC — clean white finish, a modern front panel, and a digital display that's actually readable from across the room. LG has clearly paid attention to aesthetics here: the unit doesn't scream "appliance" the way older units do, and it blends reasonably well in both modern apartments and more traditional bedroom setups.

The unit measures approximately 19.9" wide x 14.8" deep x 12.2" tall and weighs around 56 pounds. That's a standard footprint for an 8,000 BTU window unit, meaning it fits most double-hung windows with openings between 23" and 36" wide and at least 13" tall. LG ships it with the necessary foam insulation strips and window mounting hardware, so first-time installers won't need to make a hardware store run.

The front panel houses a straightforward button layout alongside the digital display, and LG includes a full-function remote control in the box. But where this unit really differentiates itself is under the hood: a built-in Wi-Fi module connects the unit to your home network and the LG ThinQ smartphone app, giving you full remote control from anywhere with a data connection. For renters and apartment dwellers who need cooling that's flexible and smart-home ready, this is a genuinely compelling package.

One design note worth mentioning: the side accordion panels that fill the window gap are plastic, as is standard for window units at this price point. They do the job functionally, but if you're hoping for a truly airtight seal, you may want to invest in supplemental weather stripping. LG does provide foam tape to help, and most users report the included materials are sufficient for typical installations.

Cooling Performance

The LW8017ERSM is rated at 8,000 BTU, which LG and most HVAC guidelines suggest is appropriate for rooms up to approximately 340–350 square feet. In practice, that covers a typical master bedroom, a decent-sized home office, or a studio apartment's main living area with ease. In spaces closer to 200–250 sq ft, you'll find the unit reaches your target temperature quickly and cycles off more often — saving energy in the process.

The unit offers 3 cooling speeds (low, medium, and high) and a 3-speed fan-only mode for days when you don't need active cooling. There's also a dedicated Dehumidification mode that removes moisture without significantly dropping the room temperature — a genuinely useful feature during muggy spring and fall shoulder seasons in humid climates. The unit can remove up to 1.8 pints of moisture per hour, which is solid for a unit of this size.

Noise levels are a common concern with window ACs, and the LW8017ERSM performs respectably here. At its lowest fan setting, the unit operates at approximately 44 dB — roughly equivalent to a quiet library. High-speed operation pushes that closer to 52–54 dB, which is noticeable but not disruptive for most people. LG's compressor is well-damped, meaning you don't get harsh start-stop shudders that can be jarring at night.

The built-in 4-way air direction control lets you adjust the louvers both horizontally and vertically, helping you direct airflow toward specific areas of the room. This is more useful than it might sound — in rooms with awkward layouts, being able to angle airflow toward a bed or desk makes a real comfort difference. Overall, the cooling performance is exactly what you'd hope for from a major brand at this capacity: consistent, quiet, and efficient.

Smart Features & App Control

This is where the LW8017ERSM genuinely earns its "smart" label. The unit connects to your home Wi-Fi (2.4 GHz only — note that 5 GHz networks are not supported) and pairs with the LG ThinQ app, available for both iOS and Android. Once connected, you can turn the unit on or off, adjust the temperature, switch modes, and set schedules entirely from your phone — whether you're in the next room or across town.

The ThinQ app itself is well-designed compared to competitors in this space. The home screen gives you a clear overview of your unit's current status, and controls are logically laid out. The scheduling feature is particularly useful: you can program the unit to start cooling 30 minutes before you typically arrive home from work, so you walk into a comfortable room without wasting energy all day. The app also provides basic energy monitoring data, giving you a rough sense of monthly operating costs.

Voice control is supported via both Amazon Alexa and Google Assistant. Once linked through each platform's respective app, you can use commands like "Alexa, set the living room AC to 72 degrees" or "Hey Google, turn off the air conditioner." The integration is reliable in everyday use — commands execute within a second or two, and the unit correctly reports its current state back to the voice assistant. SmartThings compatibility is not native, but third-party workarounds exist for Samsung ecosystem users.

The LG ThinQ platform also supports auto-diagnosis features, which can alert you to maintenance needs (like a dirty filter) or connectivity issues through the app. It's a small touch, but one that genuinely helps with long-term ownership. The unit also has a 24-hour on/off timer accessible both from the app and the physical remote, covering the bases for users who prefer not to use voice control or smartphone apps.

Energy Efficiency

The LW8017ERSM carries the Energy Star certification, which means it meets EPA guidelines for energy efficiency. Its Energy Efficiency Ratio (EER) is 12.1 — meaningfully above the minimum 10.8 required for Energy Star certification in the 8,000 BTU category. In practical terms, the unit uses approximately 660 watts at full cooling capacity, which is reasonable for its output.

To put operating costs in perspective: running the LW8017ERSM for 8 hours per day at the U.S. average electricity rate of around $0.16/kWh would cost roughly $0.84 per day, or about $25–$30 per month during peak summer use. That's competitive for the category, and smart scheduling via the ThinQ app can reduce that figure further by limiting runtime to when you're actually present and need cooling.

The unit also includes an Energy Saver mode, which cycles the fan and compressor off once the room reaches the set temperature and cycles them back on only when needed. This is distinct from the standard "Cool" mode where the fan continues to run even when the compressor is off. Energy Saver mode can meaningfully reduce electricity consumption, particularly overnight when room temperatures are more stable.

For environmentally conscious buyers, the LW8017ERSM uses R-32 refrigerant, which has a significantly lower global warming potential (GWP of 675) compared to the older R-410A (GWP of 2,088) used in many competing units. It's a meaningful step forward for a product in this category, even if it's not the only factor to weigh in your purchase decision.

Full Specifications

Installation & Setup