These compact, light-weight, easy to install heaters can be used for many commercial or light industrial water heating applications.

The Series HX-352 (12 W/in2), HX-354 (20 W/in2) and HX-356 (50 W/in2) Heatrex circulation heaters are designed for heating gases, water and oil.

The Series HX-351 (12 W/in²) and HX-353 (20 W/in²) Heatrex circulation heaters are designed for heating oil.

The Series HX-350 (12 W/in²), HX-357 (20 W/in²) and HX-358 (50 W/in²) Heatrex circulation heaters are designed for heating mildly corrosive liquids or pure water solutions. This design may also be used for heating gases or liquids to high temperatures with optional thermostat and high temperature construction described in the Special Features section.

The Series HX-355 (50 W/in²) Heatrex circulation heaters are designed for heating water.