About 4.8 million box fans are being recalled by a Pennsylvania company because they pose a fire hazard, the government said Thursday. Lasko Products Inc. of West Chester, Pa., is recalling the fans as an electrical failure in the fan’s motor can lead to a fire, the Consumer Product Safety Commission said. The problem was associated with seven reports of fire -- including two house fires and a barn fire -- that caused significant property damage, the commission said. No injuries were reported from the fires.