The Dreo Portable Air Conditioner 740S is a high-end portable A/C with an inverter-controlled compressor and a dual-hose design. It's meant for medium-sized to large spaces and has an advertised coverage of 400 ft² (37 m²). It also features an LED display, along with Wi-Fi connectivity, so that you can monitor operating time or change settings via a smartphone app. The app also has Amazon Alexa and Google Assistant support, so you can operate the unit through voice commands.
Our Verdict
The Dreo Portable Air Conditioner 740S is a great choice for large rooms. It's capable of efficiently cooling spaces like living rooms or small partial basements, but it's liable to struggle with especially big open-concept areas. It does a fantastic job of holding your desired temperature and humidity level, and also runs impressively quietly, so it won't be a huge distraction if you leave it running while watching TV or if you have guests over. That said, it isn't especially power-efficient, especially when compared to higher-capacity portable units with otherwise similar designs.
Inverter compressor helps minimize swings in temperature and humidity.
Can effectively cool living rooms or especially big bedrooms and offices.
Power consumption is similar to higher-capacity models while cooling a room and maintaining temperature.
Capacity isn't quite sufficient for massive open-concept areas.
The Dreo Portable Air Conditioner 740S is great for use in bedrooms or any other small room. It's reasonably compact for a dual-hose portable unit and runs very quietly overall, so it shouldn't be a major disturbance even in smaller bedrooms. More than that, its inverter compressor gives it the flexibility to operate effectively in undersized areas, like small bedrooms, without making the air in your room feel clammy. That said, it will have a greater impact on your utility bill than some other alternatives.
Short, squat body makes it easy to store.
Impressively quiet overall.
Inverter compressor helps minimize swings in temperature and humidity.
Can effectively cool living rooms or especially big bedrooms and offices.
Separate exhaust and intake hoses take up more room than single-hose units.
Power consumption is similar to higher-capacity models while cooling a room and maintaining temperature.
The Dreo Portable Air Conditioner 740S has impressive cooling capacity. It's sufficient for bigger living rooms, as well as the largest home offices or primary suites, though it doesn't quite have the capacity to handle especially large open-concept spaces all by itself.
Can effectively cool living rooms or especially big bedrooms and offices.
Capacity isn't quite sufficient for massive open-concept areas.
The Dreo Portable Air Conditioner 740S' overall efficiency is okay. Its power consumption is somewhat high when compared to some other dual-hose portable units with similar or greater capacity. Its inverter compressor runs steadily at a lower speed when holding your desired temperature, but overall consumption still trends higher than some alternatives.
Power consumption is similar to higher-capacity models while cooling a room and maintaining temperature.
The Dreo Portable Air Conditioner 740S does a fantastic job of keeping ambient conditions stable. Its compressor modulation is very minor once the unit cools your room to your desired setpoint, keeping the air in your room cool and dry rather than unpleasantly cold and clammy.
Inverter compressor helps minimize swings in temperature and humidity.
The Dreo Portable Air Conditioner 740S is an impressively quiet appliance. Fan noise at its highest setting can be a little noticeable, but it's still far from a massive nuisance, and it'll fade into the background at more modest settings, especially in spaces like a living room where you might have a TV playing nearby.
Impressively quiet overall.
The Dreo Portable Air Conditioner 740S is decently compact, particularly for a portable unit with this level of capacity. It has a squat, short body, which makes it easier to fit in a closet during colder months. That said, its dual intake and exhaust hoses take up more room than an A/C with a single-hose design.
Short, squat body makes it easy to store.
Separate exhaust and intake hoses take up more room than single-hose units.
Performance Usages
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Differences Between Sizes And Variants
The Dreo Portable Air Conditioner 740S is only available in a single colorway: white. For those interested, here's the product label for the unit we bought and tested.
Let us know in the comments below if you come across another variant of this air conditioner.
Popular Air Conditioner Comparisons
The Dreo Portable Air Conditioner 740S is a 10,000 BTU/hr portable A/C. It offers standout capacity for its class, being able to cool rooms slightly faster than alternatives like the Whynter NEX ARC-1030WN. It's also remarkably effective in maintaining your desired temperature and humidity level when compared to alternatives like the Hisense HAP0825TWD. Its one main weakness is its somewhat high power consumption; the Midea Duo MAP12S1TBL provides comparable cooling capacity while having a smaller impact on your utility bill.
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.
The Whynter NEX ARC-1030WN and Dreo Portable Air Conditioner 740S are somewhat evenly matched dual-hose portable A/Cs, though the Dreo has a slight edge in performance-to-size. Despite both units sharing the same advertised 10,000 BTU/hr cooling capacity, the Dreo is noticeably more compact and far lighter. However, since both units roll on casters, the latter doesn't matter so much. Meanwhile, the Whynter runs marginally quieter.
The Midea Duo MAP12S1TBL is a better dual-hose portable A/C than the Dreo Portable Air Conditioner 740S. Both units are evenly matched in cooling capacity, but the Midea is noticeably more power-efficient at cooling and maintaining your desired temperature. Its cooling fan is also significantly quieter than the Dreo model's, which is especially noticeable at lower settings.
The Dreo Portable Air Conditioner 740S is a more capable portable A/C than the Hisense HAP0825TWD. The Dreo offers greater overall cooling capacity and does a significantly better job of holding your room's temperature at your desired level. That said, the Hisense is a little smaller and a little quieter, particularly at higher fan speeds.
Test Results
This model offers impressive cooling capacity. Its performance is comparable to other 10,000 BTU/hr units like the Whynter NEX ARC-1030WN and is high enough to effectively cool spaces like larger living rooms, bigger offices, and playrooms.
The Dreo Portable Air Conditioner 740S is fairly efficient when cooling a room to your desired temperature. Its dual-hose design makes it more efficient than single-hose alternatives with similar capacity, since it draws in outdoor air to cool the compressor. That said, its upfront power demand is somewhat high.
This A/C unit is reasonably efficient when maintaining your desired temperature. While it consumes more power than a window A/C unit with comparable capacity, its inverter compressor can run steadily at a lower rate, so there are no big spikes in power consumption when cooling is required.
This unit does an outstanding job of maintaining a stable temperature once the setpoint is reached. Its compressor modulations are very minor, which keeps temperatures from deviating from your desired setpoint by a noticeable degree.
The Dreo Portable Air Conditioner 740S does a fantastic job of maintaining ambient humidity levels. Its inverter compressor modulates very slightly when holding your desired temperature. As a result, you won't experience any major swings in humidity, even in areas where the air holds a high level of ambient moisture.
This unit is fairly feature-rich. There's an LED display that shows your current desired temperature and settings, along with a remote control and Wi-Fi connectivity, so you can operate the unit with its smartphone app. The app also has support for Google Home and Amazon Alexa, so you can operate the unit using voice commands.