Lasko Small Powerful  Electric Space Heater Ceramic Digital with Remote Control. This Powerful little heater puts the same heat as the larger models of 1500 watts on high but is just smaller. I heat my whole house with portable heaters for over 10 years and I am shocked how much heat this puts off , I have it under my kitchen table on low. (Low runs all the time usually at 800w with Lasko not sure on this model) and a bigger Lasko model on a set temperature on high in my living room in case it needs to compensate the temperature (High on most  models will turn on and off using 1500 watts 2 Degrees above the set temperature and turn back on 1 degree under the set temperature ) . You should never use extension cords with any portable heater and should have upgraded electric or a dedicated outlet.