• 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 × 148 × 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 under-floor heating an option is available to use zone 8 for conventional radiator control.