You can use portable air conditioners with a cooling capacity up to 12,000 BTU in a small room of up to 34m2. These portable air conditioners have the lowest cooling capacity, so they're suitable for spaces like an office or bedroom. A portable air conditioner doesn't cool as well when there are many electric products in a room, such as a TV, fridge, or console. Does your room have many electric products in it? Choose a portable air conditioner with a higher cooling capacity.