Summer calls for cooling, but not all of us have the luxury of central air. In fact, because of our window placement or where we want to cool (hello, hot garage), a portable air conditioner might be the best bet. A portable air conditioner (PAC) is a unit that sits on the floor, and can be moved around with relative ease. But how do figure out which one is best for your space?

The main thing to look out for is BTU (British thermal units), which is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. Most window AC units have a cooling capacity ranging from 5,000 to 12,500 BTU, and the general rule of thumb is that you need 20 BTU for each square foot of living space. So, the bigger the room, the higher the BTU you should look for.

Personal USB Portable Air Conditioner

Caynal Personal Air Cooler


Obviously this product won’t cool a whole room by any stretch of the imagination, but if you’re working in an office, garage, or attic and need some help on the cooling front—this is your new go-to. It’s an air conditioner and humidifier, so it does double duty on a small easy-to-fill water tank, and is small enough to sit on a desk or table.

Stuffy office space? This three speed portable air conditioner is perfect for sticking under your desk or next to your bed to cool down your space. The portable handle makes it easy to take room to room, and it also functions as an air purifier. At under $50, this is a serious steal that’s hard to beat.

SPT 8,000 BTU Portable Air Conditioner


This mobile air conditioner is small but powerful. The two-in-one air conditioner with dehumidifier is powerful enough to cool your space, but small enough to move throughout your entire house. The washable air filters will keep your air clean and the clever self-evaporating system expels moisture from the air, all at just $250.

Soleus 8,000 BTU Portable Air Conditioner


This 8,000 BTU model will cool up to 200 square feet, and features a sleep and energy-efficient auto mode along with a remote control. It also has a fan and dehumidifier for extra comfort, and a washable air filter to keep the air it circulates clean.

LG Electronics 10,200 BTU Portable Air Conditioner


This mid-sized portable air conditioner is a sleek option to cool rooms up to 300 sq. ft. With two cooling fans and two speed fans, this air conditioner is a powerful option that isn’t conspicuous in appearance. Even better, the 24-hour on/off timer lets you create a cooling schedule without wasting electricity, so you can set it to turn on before you get home or after you leave.

BLACK + DECKER 14,000 BTU Portable Air Conditioner Unit


This 14,000 BTU unit from BLACK + DECKER has nearly 1,000 5-star reviews, and features cooling, fan, and dehumidifier modes for ultimate functionality. It can cool up to 350 square feet of space and has easily programmable controls—and if you want something a little smaller, you can go for 8,000, 10,000, or 12,000 BTU versions of the same model.

Olimpia Splendid 10,000 BTU Portable Air Conditioner


Looking for something discrete? This compact, portable air conditioner is a great smaller option that still has a dehumidifier and fan-only controls. With all the fancy features of a larger air conditioner, including sleep mode, automatic condensation disposal, and a remote control, this affordable option gives you all the frills without the cost.

Honeywell 10,000 BTU Portable Air Conditioner


This Honeywell unit features tons of great reviews, uses an auto-evaporation system for no drips, and has a thermal overload protection (meaning it’ll shut off if it gets too hot), giving you (and your electrical outlet) peace of mind. It’ll cool up to 450 square feet of space.

Whytner 14,000 BTU Portable Air Conditioner


This Whytner model has a 24-hour timer, remote, and an auto-restart function for power outages. Even better? It can be used as a large space heater in the winter, making it ideal for year-round use in spaces up to 500 sq. ft.

Frigidaire Gallery 12,000 BTU Cool Connect Smart Cylinder Portable Air Conditioner


Forget the usual shapes—this guy blends into a room with ease and can cool up to 550 square feet. It also works by using the Frigidaire Smart App on your phone, meaning you can control it from anywhere. Plus, you’ll get notices when it’s time to clean the filter and can track hours of use, all from your phone.