A.O. Smith Corp. is testing the Tangerine Wellness Inc. health incentives program.

A.O. Smith, a maker of water heating equipment and electric motors, will start testing the wellness services of Tangerine Wellness, Boston, at 2 U.S. facilities, Tangerine Wellness says.

If the text goes well, A.O. Smith will begin using the program in other U.S. facilities in 2008, the company says.

The Tangerine Wellness program pays cash and other rewards to health plan members who lose weight or take other steps to improve their health.