A new high-volume, low-speed (HVLS) fan ventilates livestock barns, farm shops and other farm buildings more effectively and affordably than conventional industrial fans, according to its manufacturer.

The fan runs at a slow speed to move large columns of air. Conventional industrial fans, in comparison, are much smaller and run at high speeds, requiring a lot more energy. One fan creates double the air movement and draws one-tenth the power of 25 4-ft. fans and will handle areas of 10,000 to 20,000 sq. ft. year-round. List price: 3,750 dollars. Contact HVLS Fan Co., Dept. FIN, Box 11307, Lexington, KY 40575-1307, 606/254-9921.