What to look for in a portable air conditioner Btu and room size: One British thermal unit (Btu) equals the heat needed to raise one pound of water by one degree Fahrenheit. In cooling ...

The unit can heat or cool a space of about 100 to 150 square feet -- about the size of one small room, a van or trailer. This isn't an all-weather, cold-climate heat pump-- it can operate in ...

This high-end, portable air conditioner has a dual-hose design for efficient cooling. Pros: The dual-hose design effectively ...