Portable heaters have stolen the show since ... It runs from 650 watts to 1200 watts and can heat rooms of about 350 square feet. The heater has an inbuilt-cooling system that swings into action ...
To see if it lives up to the hype, we gave it a try ourselves, and here's what we found: The Heater Pro X Portable Mini Heater ... heat an area to 250 square feet in size using only 800 watts ...