Gradient's advanced window unit can heat and cool 500 square feet of your home. And you won't need an electrician.
used in cold climates when it’s too cold outside to efficiently run the heat pump. And, if you don’t have a heat pump yet, you can always try and build your own.
If your home has vents for forced air heating and/or cooling, you may replace both the furnace and the AC unit with an outdoor heat pump ... before you begin an installation project.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results