Do the personal models, such as the CD2800, heat the water in the ultrasonic cleaner's tank?

If you need a heater, you may try the larger, commercial models such as the iSonic P4810 which is the smallest model with a heater. In addition to including a heater, this model also has a larger tank size and a stronger, more powerful stack transducer. The smaller models will raise the temperature of the water in the ultrasonic cleaner's tank by a few degrees, but they do not include a heater as an extra feature.