Can One Thermostat Control Both FCU and Underfloor Heating?

In luxury residential projects, wall clutter is a design failure. Using two separate thermostats—one for the floor and one for the fan coil—is inefficient and confusing for the end-user.

A single, integrated Smart HMI interface simplifies the user experience and ensures a cohesive interior design while maintaining independent setpoints for different seasons.

The primary risk of fragmented controls is "Thermal Conflict," where the floor heating and FCU cooling operate simultaneously. An integrated controller solves this through Hardware Interlocking.

When the system is switched to "Summer Mode," the controller automatically disables the floor heating output while enabling the FCU’s chilled water valve and fan speeds. This ensures the heat pump never receives conflicting demands, maximizing the system's COP (Coefficient of Performance).

Dew point management is critical in hybrid systems. If chilled water intended for the FCU accidentally enters the underfloor heating loops, it can lead to floor condensation and structural damage.

Professional-grade thermostats manage this via precise Relay Sequencing. By coordinating with the Modular Wiring Center, the system ensures that the 3-way valves fully redirect flow and isolate the floor loops before the cooling sequence begins.