Jim, If things are working properly and all connections are tight, both fans will draw about 28 to 30 amps. This depends on how many miles are on the fan motors. I took mine apart and rebuilt them, clean, oil, new brushes and they now draw about 11-12 amps ea under full load. My new fan fail jumper is now fused at 15 amps on ea leg and they just barely heat. That's what you want. I try not to over fuse or you loose protection. With 25 amps per leg, you might as well wire them direct. John Hervey 11004