The main working parts are a compressor, which circulates a refrigerant through a system of copper coils, and a fan to ...

However, a broken sensor, low levels of refrigerant, or blocked vents can lead to a frozen system, so it's important to keep up with the maintenance schedule. If you live in one of the colder parts of ...

Say goodbye to electricians. Gradient's 120-volt All-Weather Heat Pump heats and cools up to 500 square feet and plugs right into a standard outlet. Jon Reed is a senior editor covering artificial ...