- For use in ventilation and air-conditioning systems for water-side terminal unit control in closed circuits, e.g. for induction units, fan-coil units, small reheaters and small recoolers.
- 2-pipe systems with 1 heat exchanger for heating and cooling
- 4-pipe systems with 2 separate heat exchangers for heating and cooling
- In closed-circuit zone heating systems, e.g. for:
- Separate floors in a building
- Individual rooms