Gradient's advanced window unit can heat and cool 500 square feet of your home, and it doesn't require any electrical work.

Learn how to warm up a room without using a plug-in electric heater. Consider built-in radiant floor or ceiling heating, duct booster fans, toe-kick heaters and other safe heating techniques first.

Whilst they’re designed to cool a variety of devices, the brand now suggests they can improve home radiator efficiency and ...