In the attempt to move some of the hot air around, I saw this product. Ecofan is a heat-powered fan designed to circulate the warm air created by a woodstove operating with normal surface temperatures. Has anyone used these? A & B. Intended for wood-burning stoves, the medium-size model can produce up to 100 CFM of air movement, stands 8" tall, and has an 8" diameter brass blade, while the large model can produce up to 150 CFM of air movement, stands 9" tall, and has an 8" diameter brass tri-blade. Both models operate on surface temperatures between 400° and 650°F (205° to 345°C). C. The Ecofan™ GS is specifically for gas stoves, which operate at lower temperatures than wood-burning stoves. It has a base designed for greater heat conduction and two thermoelectric modules (the others have only one) to create enough electricity to run the motor. 6-1/2" tall, it has an 8" diameter brass blade. Operates on surface temperatures between 150° and 300°F (65° to 150°C) and circulates up to 150 CFM. Cannot be used on wood stoves (the high heat causes an overload switch to trip). I would guess that I would need the C option ...but not sure.