The Heatmiser TA230 thermal actuator is designed for use with the FastWarm; Manifold and, when wired back to the wiring center (UH4/UH8/UH8-RF), will offer individual zone control of the underfloor heating system. The Heatmiser TA230 thermal actuator is designed for use with the FastWarm; Manifold and, when wired back to the wiring center (UH4/UH8/UH8-RF), will offer individual zone control of the underfloor heating system.