THE ECOFAN ORIGINAL® is the most economical model in the Ecofan family, moving up to 100 cubic feet of air per minute (CFM). It is also the smallest model at 8.5” tall (9.25” with blade) x 5.5” wide x 3” long and comes with a black blade. The Original operates at a stove surface temperature range of 230°F – 650°F (110°C – 345°C).