10 Best Energy Efficient Portable Air Conditioning Units 2025 in the United States

The BLACK+DECKER Smart Portable Air Conditioner with Heat offers significant versatility with its four-in-one functionality, providing cooling, heating, dehumidification, and fan options. Its cooling capacity reaches 14,000 BTU ASHRAE (10,000 BTU DOE), making it suitable for rooms up to 700 sq. ft., while the heating function delivers 12,000 BTU, ensuring year-round usability.

Despite its high cooling power, it operates at a relatively moderate noise level of 54 dB, which is comfortable for most users, especially during sleep. However, its SEER of 6.2 indicates that it is not the most energy-efficient option available, which may be a concern for those prioritizing energy savings. The unit includes a 'Follow Me' remote control feature, enhancing user convenience by allowing precise temperature control. Additionally, it supports smart technology with voice control via Amazon Alexa or Google Assistant and can be managed through a dedicated mobile app.

Portability is well-addressed with its compact form factor and included installation kit, making setup straightforward. The absence of an Energy Star rating reflects its lower energy efficiency, potentially leading to higher energy costs compared to more efficient models. For filter maintenance, regular cleaning is necessary to ensure optimal performance. This unit is ideal for users seeking a versatile, smart-controlled portable air conditioner that can also provide heating, although energy-conscious buyers might want to consider options with higher energy efficiency ratings.

The BLACK+DECKER Portable Air Conditioner (model BPACT08WT) offers a cooling capacity of 9,000 BTU (ASHRAE) and 5,300 BTU (DOE), which is suitable for rooms up to 400 sq. ft. This makes it a good option for bedrooms or small living spaces. One of its strengths is the 'Follow Me' remote control feature, allowing precise temperature control based on the remote's location. This unit also functions as a dehumidifier and fan, adding versatility to its cooling capabilities.

It has a relatively low EER (Energy Efficiency Ratio) of 5.4, which may not be the most energy-efficient option available. The noise level of 54 dB is moderate, meaning it won't be completely silent but should not be overly disruptive either. Portability is a key feature, with casters and side handles making it easy to move between rooms. The included installation kit simplifies the setup process.

Maintenance is straightforward with the washable filter, although it may require regular cleaning to maintain performance. The BLACK+DECKER Portable Air Conditioner is a versatile and user-friendly option for cooling small to medium-sized rooms, with the main drawbacks being its lower energy efficiency and moderate noise level.

The Midea Duo 14,000 BTU portable air conditioner is a standout option for those needing an energy-efficient and quiet cooling solution for spaces up to 550 sq. ft. Its innovative hose-in-hose design enhances air circulation and prevents hot air from re-entering the room, improving cooling efficiency. The unit operates at a remarkably low noise level of 42 dB, making it one of the quieter options on the market, ideal for bedrooms or offices where noise can be a concern.

Additionally, the variable-speed inverter technology allows it to save more than 40% energy compared to traditional units, aligning well with the category's focus on energy efficiency, and it boasts a SEER of 12.3, which is commendable. This model also includes a dehumidification function, removing up to 58.99 liters of moisture daily, which is beneficial in humid climates. The smart Wi-Fi capability, compatibility with Alexa and Google Assistant, and a programmable timer add convenience for modern users.

Portability features such as the compact design and included window kit make installation and movement straightforward. However, potential drawbacks include the higher initial investment compared to less efficient models and the regular maintenance required for the dust filter. Despite these, the Midea Duo offers a blend of advanced features, efficiency, and quiet operation that makes it a strong contender for anyone seeking a high-performing portable air conditioner.