LK Minishunt M60n I Single Zone Underfloor HeatingLK Minishunt M60n I Single Zone Underfloor Heating Thermostat controlled shunt unit for use when smaller underfloor heating systems are to be connected to an existing heating system. The shunt unit is to be used in systems with the main pump in the primary circuit. Its capacity can be set at a flat rate of heating requirements of 50 W m to max 60 m of floor heating area. The capacity is dependent on the primary temperature, pressure, floor heating