Gradient's advanced window unit can heat and cool 500 square feet of your home. And you won't need an electrician.

But that was before heat pumps started becoming a big part of New England heating, so I thought it was worth a revisit. For the impatient among you, here’s the spoiler: Turning the thermostat ...

A Gradient rep told CNET by email you won't need to hire a professional to help install it ... the app or from a touch thermostat on the indoor unit. The heat pump also doesn't block the ...