• Eight-Zone Hydronic Control: Supports direct connection of up to 8 independent 230V on/off thermostats, each switching a dedicated output rated 230V 3A; accommodates up to 4 thermal actuators per zone, providing flexible manifold design for large-scale underfloor heating systems
• Centralised Pump, Valve, and Boiler Integration: Includes switched 230V outputs for manifold circulation pump and 2-port UFH valve (each 3A max), plus a volt-free relay output (LS/LR/E) for boiler enable, ensuring full compatibility with modern system boilers and pump interlock logic
• Dual Time Channel Bus: Two 230V time channel inputs allow grouped scheduling via external programmers (e.g. Heatmiser TM4), enabling parallel time control for different sets of zones or heating areas
• Zone 8 Radiator/Towel Rail Isolation: Dedicated slide switch allows Zone 8 to operate in radiator mode enabling boiler call independently of UFH pump and valves. Suitable for mixed underfloor/radiator configurations and towel rail integration
• Diagnostic and Safety Features: Neon status indicators for all zones and outputs facilitate rapid commissioning and troubleshooting; enclosure includes internal 5A anti-surge fuse, all outputs rated 3A, and clear terminal labelling to meet professional installation standards
• Professional Build, Mounting, and Compliance: DIN rail or surface mountable, compact IP20 enclosure (384 x 148 x 60 mm); designed for use with Heatmiser and compatible third-party 230V thermostats and actuators. All installation to be carried out by a qualified electrician in accordance with BS7671 and manufacturer's instructions

The Heatmiser UH8 can be used in conjunction with our mains thermostats. The UH8 is also ideally suited for underfloor heating. When used for underfloor heating an option is available to use zone 8 for conventional radiator control.