Warm up your room 38% faster with the largest and highest performing Ecofan(TM) fan Ultrair. The ultrair circulates more warm air further into your room. tested and proven to save you up to 14% in fuel with more efficient distribution of heat from your wood stove, no electricity needed the Ecofan generates its own power by converting heat into electricity. Designed and manufactured in Canada for over 20 years. This product is covered by a 2-year warranty.