Mixing Unit for Underfloor Heating FERRO GM40GPA with 1" Connections and Electronic Pump 25-40/130

FERRO GM40GPA is a compact mixing unit for underfloor heating designed for installation in manifolds and distribution cabinets. It integrates a 1" connection layout with an electronic circulation pump rated 25-40/130 to blend supply and return flows, enabling precise control of floor heating temperature and hydraulic separation between primary and secondary circuits. The unit is intended for residential and light-commercial heating circuits where stable low-temperature distribution and simple integration into existing systems are required.

Advantages

The mixing unit provides controlled temperature blending with consistent circulation thanks to the built-in electronic pump. Its 1" connections facilitate straightforward plumbing connections to common manifolds and piping systems. The design supports hydraulic separation and reliable pump operation across typical underfloor heating loads, reducing the need for additional components in many installations. Compact dimensions and factory-integrated pump simplify installation and maintenance compared with separate pump-and-mixing arrangements.

Suitable for

• Residential underfloor heating circuits
• Light-commercial low-temperature heating zones
• Installation in manifold cabinets and distribution panels
• Systems requiring hydraulic separation between boiler and floor loops

Key specifications

• Connection size: 1" threaded fittings suitable for standard heating manifolds
• Integrated circulation pump: electronic pump with performance class 25-40/130
• Function: thermostatic mixing of supply and return to control floor circuit temperature
• Application: designed for low-temperature underfloor heating distribution
• Installation location: manifold cabinets, distribution cabinets, or dedicated mounting near floor loops

How to use

Install the mixing unit according to local regulations and the manifold cabinet layout, ensuring correct orientation of supply and return connections. Connect the primary heat source and the underfloor heating circuits using 1" fittings, secure all joints and perform pressure and leak testing. Set the system controls so the electronic pump operates with appropriate flow and differential pressure for the size of the floor circuit. Commission the circuit by gradually ramping to operating temperature while checking temperature and flow balance across the floor zones.

Usage recommendations

During commissioning and routine maintenance, verify pump electrical supply and settings, inspect for leaks, and confirm stable mixing performance. Use appropriate air separation and filtration upstream to protect the pump and valve assemblies. For optimal operation, match system balancing valves and thermostats to the unit's flow capacity and consult local installation codes.