1. R & D Engineering 690 N Chestnut Ave, Earlham, IA 50072 Coordinate: 41.49714,-94.12287 Phone: (515) 218-7214
2. A-One Geothermal 1635 135th St, Earlham, IA 50072 Coordinate: 41.45308,-94.12205 Phone: (515) 758-2559