When a central AC system is not an option and window units are off the table, a portable air conditioner steps in. Renters, room additions, and anyone who needs cooling that moves with them depend on these units every summer.
The five picks below cover the most common room sizes and use cases. Each one vents through a standard window kit that installs in minutes without tools.
| Product | Best For | Rating |
|---|---|---|
| LG LP0821GSSM | Small bedrooms | 4.6/5 |
| Whynter ARC-14S | Large rooms | 4.5/5 |
| BLACK+DECKER BPACT08WT | Budget cooling | 4.3/5 |
| Midea Duo MAP12S1TBL | Efficient dual-hose | 4.6/5 |
| Honeywell MN10CESWW | Mid-size apartments | 4.4/5 |
LG LP0821GSSM — Best for Small Bedrooms
The LG LP0821GSSM delivers 8,000 BTU in a compact body that fits in corners without dominating a room. It cools up to 350 square feet reliably and includes a dehumidifier mode for humid summer nights. The built-in WiFi connects to the LG ThinQ app, so you can adjust the temperature without getting up.
Noise levels are moderate at around 53 dB on low, which is acceptable for a bedroom. The window venting kit installs in minutes. Auto mode adjusts cooling intensity based on room temperature, which saves energy during mild nights.
Whynter ARC-14S — Best for Large Rooms
The Whynter ARC-14S uses a dual-hose design that draws intake air from outside rather than from the cooled room. This makes it significantly more efficient than single-hose models of the same BTU rating. At 14,000 BTU it handles rooms up to 500 square feet, including open-plan living areas with high ceilings.
The unit is large and heavy at 80 pounds, but the caster wheels make repositioning manageable. Fan-only and dehumidifier modes add flexibility. If you have a large room to cool and efficiency matters, this is the most capable option in the category.
BLACK+DECKER BPACT08WT — Best Budget Portable AC
The BLACK+DECKER BPACT08WT covers 150 square feet at a price that undercuts most competitors significantly. The 8,000 BTU output is genuine, and the unit cools small rooms and offices reliably. The design is simple: a physical remote, three fan speeds, and a 24-hour timer.
There is no app or smart connectivity, which may suit buyers who prefer straightforward controls. The window kit fits most standard double-hung windows. For renters cooling a single bedroom on a tight budget, this is the most honest value in the segment.
Midea Duo MAP12S1TBL — Best Efficient Dual-Hose Model
The Midea Duo uses a dual-hose system with a unique hose design that reduces installation complexity while maintaining the efficiency advantage of dual-hose cooling. At 12,000 BTU it covers rooms up to 450 square feet. The inverter compressor adjusts output continuously rather than cycling on and off, which reduces energy use and noise.
App control via Midea Air is reliable, and the unit can integrate with smart home systems through voice assistants. The window kit seals well, which matters for both efficiency and keeping insects out. For the buyer who wants dual-hose efficiency without the bulk of the Whynter, this is the right choice.
Honeywell MN10CESWW — Best Mid-Size Apartment Unit
The Honeywell MN10CESWW puts out 10,000 BTU and covers up to 450 square feet. It has a clean design that blends into apartment interiors and a digital display that is easy to read from across the room. The dehumidifier pulls up to 2.4 pints per hour, which is useful in humid climates.
The auto-evaporation system handles most condensate without requiring you to drain a tank, which is a meaningful convenience advantage. The 24-hour programmable timer lets you pre-cool a room before you arrive home. Noise is on the average side for the category at around 56 dB.
How to Choose a Portable Air Conditioner
Match BTU to room size first. Buying more BTU than you need wastes money and electricity. After that, consider single-hose versus dual-hose: dual-hose units are more efficient but larger. If you move the unit between rooms, single-hose is more practical.
Check noise ratings if you plan to run the unit while sleeping. Anything below 53 dB is quiet enough for most sleepers. Look for auto-evaporation if you dislike draining tanks. Finally, confirm your window type is compatible with the included venting kit before purchasing.
For more home cooling guidance, see our best tower fans and best window air conditioners reviews. Learn how we evaluate products at /methodology.
Frequently asked questions
How many BTUs do I need for my room size?+
A general rule: 8,000 BTU covers up to 350 sq ft, 10,000 BTU covers up to 450 sq ft, and 14,000 BTU covers up to 700 sq ft. Add 10% capacity for rooms with high ceilings, heavy sun exposure, or significant heat sources like computers and appliances.
Do portable air conditioners work as well as window units?+
Portable units are less efficient than window ACs of the same BTU rating because they vent warm air through a hose that can also pull some cooled air out. They cool effectively for most home situations but may struggle in extreme heat or very large rooms. For renters who cannot install window units, they are the practical solution.