Pros: Simple mug-warmer design is compatible with many types of mugs and cups. Three heating levels range from 104 to 149 degrees. Discreet on-off switch allows you to power down the heating ...

The U.S. heating specialist has agreed to invest an unspecified sum in Dutch startup Blueheart Energy, which is developing a 6 kW heat pump that works on acoustic waves and is able to produce both ...