JL Becker Company The J. L. Becker Co. has been engineering and manufacturing new furnaces, gas generators and auxiliary equipment since 1974. All engineering and assembly are completed in our 66,000 sq. ft. facility in Plymouth, Michigan using American made products wherever possible. We can perform "turnkey" operations, including utility layouts and other required customer assistance. Our furnace design and rugged construction results in energy efficient units that provide years of reliable operation w...