Best Portable Air Conditioners
A portable AC is the no-install way to cool a room you cannot put a window or mini split unit in. They are less efficient than the alternatives, so the gap between a good one and a bad one is real. Here are the picks by category and how to size one.
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Midea Duo Inverter Portable AC
Who it is for: Anyone who wants the most efficient, effective portable unit and will pay a bit more for it.
- +Dual-hose inverter design, far more efficient than single-hose units.
- +Cools harder and quieter than typical portables.
- +Among the few portables that genuinely keep a room cold in real heat.
Watch out: More expensive than basic portables, and still a portable, so it loses to a window unit or mini split on efficiency.
Black+Decker or Midea single-hose portable AC
Who it is for: Occasional use in a small room where you want the cheapest way to get cooling.
- +Lowest price way into a portable AC.
- +Simple to set up: roll it in, run the hose to the window kit.
- +Fine for spot cooling a small space.
Watch out: Single-hose design is inefficient and pulls warm air back into the room. Struggles in large or very hot spaces.
Whynter high-BTU portable AC
Who it is for: Bigger rooms that need more capacity than an entry portable can deliver.
- +Higher BTU output for larger square footage.
- +Dual-hose options that cool more effectively.
- +A long-standing brand in the portable category.
Watch out: Heavier and louder, and high-BTU portables use a lot of power. Size it with the BTU calculator so you do not overbuy.
De'Longhi Pinguino or a heat-pump portable AC
Who it is for: Rooms that need cooling in summer and a little heat in shoulder season from one unit.
- +Adds heating so one unit covers both seasons.
- +Useful for a converted garage, sunroom, or office.
- +Saves buying a separate heater.
Watch out: Heat output is modest, not a primary heat source for cold climates. Costs more than a cooling-only unit.
What actually matters when buying
Dual-hose beats single-hose. Single-hose portables create negative pressure that sucks warm air back into the room, so they fight themselves. Dual-hose and inverter units are noticeably more efficient and cool better. If you can, pay for dual-hose.
Size it, do not overbuy. Portables are rated in BTU. Too small never cools the room; too big short-cycles and leaves the air humid. Run your room through the BTU calculator before buying, and add capacity for sun, a kitchen, or high ceilings.
They are the least efficient option. A portable AC is the fallback when a window unit or mini split is not possible, because both of those are cheaper to run and cool better. Choose a portable for renting, odd windows, or rooms where nothing else fits, not as the efficient choice.
Hose, drainage, and noise. All portables vent through a window kit, so confirm it fits your window. Check how the unit handles condensate (self-evaporating is convenient), and remember portables sit in the room, so noise matters more than with a window unit.
How we picked
This is a research-based guide comparing single vs dual hose designs, BTU and efficiency ratings, and a broad set of owner reviews across the major portable AC brands. We do not take payment for placement and have not bench-tested every unit, so confirm the current specs and window fit before buying.
Useful next
BTU calculator, best mini splits.
Frequently asked questions
What is the best portable air conditioner?
For most people, the Midea Duo inverter is the best portable: its dual-hose inverter design is far more efficient and cools harder than typical single-hose units. Budget single-hose units work for occasional small-room use, and high-BTU Whynter models suit larger rooms. Size by BTU to your room before choosing.
Are portable air conditioners worth it?
They are worth it when a window unit or mini split is not an option, such as renting, odd windows, or a room you cannot mount anything in. They cost more to run and cool less effectively than those alternatives, so they are the convenient fallback, not the efficient choice.
Single-hose or dual-hose portable AC?
Dual-hose. A single-hose unit creates negative pressure that pulls warm outside air back into the room, so it works against itself and struggles in heat. Dual-hose and inverter portables are more efficient and cool better, which is why the top picks are dual-hose.
What size portable air conditioner do I need?
Size by BTU to your room's square footage, roughly 20 BTU per square foot, adjusted up for sun, a kitchen, or high ceilings. A 400 square foot room needs about 9,000 to 10,000 BTU. Use the BTU calculator for your exact room, and avoid oversizing, which leaves the air humid.