These ingenious stovetop fans are completely silent and cost nothing to operate. They have a thermoelectric module that generates electricity based on a thermocouple, which exploits the difference in temperature between the stovetop and the ambient air, a phenomenon known as the Seebeck effect.
The fan speed on each varies with the temperature difference (greater difference, greater speed), quietly moving warm air from the stovetop. Made largely from anodized aluminum, they are an efficient way to disperse heat.
A & B. Intended for wood-burning stoves, the medium-size model can produce up to 125 cfm of air movement, stands 8" tall, and has an 8" diameter brass blade, and operates on surface temperatures between 212° and 650°F (100° to 345°C); the large model can produce up to 175 cfm of air movement, stands 10" tall, and has a 9" diameter brass blade and operates on surface temperatures between 185° and 650°F (85° to 345°C).
C. The Ecofan® GS is specifically for gas stoves, which operate at lower temperatures than woodburning 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 105 cfm. Cannot be used on wood stoves (the high heat causes an overload switch to trip).
These make great gifts for anyone with a wood or gas stove.
Made in Canada.