No electricity needed, Ecofans generate power by converting the heat from your wood stove into electricity. The Ecofan Ultrair mid-sized model circulates the heat from your stove and is proven to warm your room up to 23% faster. The Ultrair is ideal for rooms up to 240 square feet. Designed and assembled in Canada for over 25 years, Ecofans have been tested in the harshest winters and come with a 2 year warranty.