The LG LP0721WSR is a single-hose portable A/C designed for medium-sized spaces, with an advertised coverage area of 300 ft² (28 m²). It features a separate dehumidification mode and lets you adjust settings with the remote control, but it lacks Wi-Fi connectivity for app functionality or smart home integration, which you can find on higher-end LG models.
Our Verdict
The LG LP0721WSR is a mediocre option for cooling large rooms. Its capacity is simply too low for it to reduce the temperature in a large space to a setpoint within an acceptable time frame. Using it in a large room forces its compressor to run constantly, increasing wear and tear over time. Its single-hose design is also rather inefficient, and its compressor is somewhat on the loud end.
Cooling capacity is too low for bigger spaces.
Poor overall maintenance and cooling efficiency.
Will need run its compressor constantly in larger spaces, increasing wear and tear.
The LG LP0721WSR is an okay choice for use in bedrooms and other small rooms. It's a decently compact unit overall, so you can shove it against a wall or stow it away in a closet without it taking up too much space. Its compressor cycles at a regular rate, which helps to reduce any unpleasant temperature fluctuations while it's running. However, it isn't great at maintaining ambient humidity levels. In addition, its compressor is also somewhat loud and can be a bit of a distraction when you're trying to get some rest.
Maintains consistent temperature levels.
Single-hose design and compact body make it easier to fit in smaller spaces.
Relatively high compressor noise.
Poor overall maintenance and cooling efficiency.
Does a mediocre job of maintaining ambient humidity levels.
The LG LP0721WSR's cooling capacity is passable. It'll struggle to cool larger living spaces within a reasonable span of time, but its capacity is just about sufficient for smaller bedrooms and home offices.
Cooling capacity is too low for bigger spaces.
The LG LP0721WSR's overall efficiency is poor. Its single-hose design is inherently inefficient, allowing warm outside air to leak into the room and forcing the unit to work harder during both the cooling and maintenance phases.
Poor overall maintenance and cooling efficiency.
The LG LP0721WSR does a decent job of maintaining ambient conditions. Its compressor cycles at a fairly rapid rate under standard operation, leaving little time for temperatures to rise and fall. That said, this compressor cycling does have a somewhat noticeable impact on ambient humidity levels, and your room may feel clammy at times.
Maintains consistent temperature levels.
Poor overall maintenance and cooling efficiency.
Does a mediocre job of maintaining ambient humidity levels.
The LG LP0721WSR is a little on the louder end of the scale. Its compressor is noticeably louder than that of some other alternatives, and it can be a distraction if you have it set up in your bedroom or home office. Its fan-only modes are rather quiet, though, so you might be forced to rely on those settings if you're a particularly light sleeper.
Relatively high compressor noise.
The LG LP0721WSR is a decently compact air conditioner. Its main body doesn't occupy much space, and while its single-hose design compromises performance and efficiency, it also yields a more compact overall package than dual-hose alternatives.
Single-hose design and compact body make it easier to fit in smaller spaces.
Performance Usages
Changelog
- Updated Sep 15, 2026: We've updated this review to Test Bench 1.1. which changes how we measure and score performance as a whole. The Capacity, Efficiency When Cooling, Efficiency When Maintaining Temperature, Temperature Stability, and Humidity Stability boxes have been updated. If you're looking for further details, see the Changelog.
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Updated Jun 11, 2026:
We added a link to the newly reviewed Hisense Tower HIAP0825TWD in the Efficiency When Cooling section of the review for users seeking a more efficient dual-hose alternative with significantly stronger cooling performance.
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Updated Jun 10, 2026:
We've added a link to the Whynter NEX ARC-1030WN in the Capacity section of the review to provide an alternative with greater cooling performance.
- Updated Jun 06, 2025: Review published.
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Differences Between Sizes And Variants
The LG LP0721WSR is only available in a single color variant: 'White.' For those interested, here's the product label.
Let us know in the comments if you come across another variant of this air conditioner.
Popular Air Conditioner Comparisons
The LG LP0721WSR is a basic single-hose portable A/C, only really suited for smaller spaces like bedrooms or offices. It competes in a fairly crowded section of the market with many direct competitors. However, compared to options like the De'Longhi Pinguino Compact PACEM360-6ALWH, the Black+Decker BPACT12HWT, and the Whynter Elite ARC-122DS, the LG simply lacks capacity and will take longer to cool an equivalently sized room. On the upside, it does consume a little less power than those models.
If you're looking for alternatives, see our recommendations for the best portable air conditioners, the best bedroom air conditioners, and the best air conditioners.
Neither the LG LP0721WSR nor the Black+Decker BPACT12HWT is an especially noteworthy A/C unit, but if you're in need of a single-hose portable unit, each has its own strengths and weaknesses. The Black+Decker offers greater cooling capacity and will chill the air in a comparably sized room faster. That said, its compressor cycling will result in more noticeable swings in temperature and humidity compared to the LG. It also uses R410a as a refrigerant, which has a higher environmental footprint than R32, used by LG and other newer A/C units.
The Whynter Elite ARC-122DS is better than the LG LP0721WSR. The Whynter has a greater overall cooling capacity and won't struggle to the same extent in oversized areas. It also runs far more quietly. It's worth noting that the LG's modest capacity does have a bit of an upside: its compressor is forced to run almost constantly to achieve your desired temperature, rather than cycling on and off, so there are no big swings in ambient humidity or temperature.
The Hisense Tower HIAP0825TWD is a significantly better portable air conditioner than the LG LP0721WSR. Its dual-hose design lets it cool rooms more effectively and efficiently by avoiding the negative pressure that single-hose units create, and its inverter compressor adjusts output to match a room's actual cooling needs rather than running at a fixed speed. The result is substantially higher cooling capacity, faster cool-down times, and lower energy consumption. It also comes better equipped for convenience, with Wi-Fi connectivity and smartphone app control. The LG does have one practical advantage, though, as it's noticeably more compact and easier to store when not in use.
Test Results
There's a strap at the back of this unit that's meant to hold any excess cable length in place. However, it's very brittle, and the retention notch snapped off when we attempted to unfasten it.
This air conditioner's cooling capacity is unremarkable. It's well-suited to bedrooms or home offices, but will struggle to quickly cool larger units.
This unit's cooling efficiency is poor. It's a single-hose model, which means it intakes indoor air to pass over its condenser and cool the unit while operating. This generates negative pressure inside the room it's placed in, leaching in warm outside air and forcing the unit to work even harder. The result is that this unit consumes far more power than dual-hose units with similar capacity, all the while having far less capacity.
If you're looking for a dual-hose alternative, consider the Hisense Tower HIAP0825TWD, which avoids these negative-pressure issues and delivers significantly greater cooling performance while operating more efficiently.
This unit's energy efficiency while maintaining the setpoint is bad. It's forced to work very hard due to its single-hose design, which doesn't leave an efficient means of cooling its compressor while it's running.
This unit does a great job of maintaining your desired temperature. Its compressor cycling is fast enough not to have a drastic impact on the desired temperature of the room it's cooling.
This unit does a mediocre job of maintaining a consistent humidity level. In more humid climates, these humidity swings will be felt more drastically, though not as much in drier, more arid areas.
