Some time ago, Ikea introduced furniture for wireless charging of smartphones and tablets, but now it wants to go one step further. Heat Harvest will collect waste heat in the house and turn it into electricity. The thermoelectric device is the work of Sergej Komardenkov and Vihanga Goro and will be incorporated into furniture such as a table. It will collect the heat given off by objects like a hot cup of coffee and a computer and turn it into free electricity that we can use again. For example, to charge smartphones.