Heat Pump Underfloor Heating Pump & Mixing Unit – Grundfos UPM3 AUTO – Up to 12 Ports

This high-performance mixing and pump assembly is purpose-built for heat pump-fed underfloor heating systems. Designed to connect directly to our floor heating manifolds, this unit features the A-rated Grundfos UPM3 AUTO circulator pump for energy-efficient performance across systems of up to 12 zones.

With adjustable inlets and fully reversible design, the unit offers total installation flexibility—whether flow and return pipes come from the side or below, and whether connecting to the left or right side of the manifold.

Pre-assembled in the UK, this compact, plug-and-play unit provides a quick, tidy and robust solution for modern, low-temperature systems.

Key Features:

• Designed Specifically for Heat Pump Underfloor Systems
• A-Rated Grundfos UPM3 AUTO 3-Speed Circulation Pump
• High Output: 3.4kW / 18kW – Supports up to 12-Port Manifolds
• Adjustable Side or Bottom Flow/Return Pipe Entry
• Fully Reversible – Left or Right Side Connection
• Compact & Lightweight Construction
• Bolts Directly to Our UFH Manifolds
• 2-Year Warranty
• Pre-Assembled in the UK

Frequently Asked Questions

• Is this unit compatible with all heat pumps?

Yes – it’s designed for low-temperature systems, making it ideal for use with air source or ground source heat pumps.

• How many zones can this pump handle?

It supports manifolds up to 12 ports, delivering up to 18kW of heating capacity.

• Can it be connected on either side of the manifold?

Yes – the unit is fully reversible, allowing left or right side connection.

• Are the flow and return pipes adjustable?

Yes – the unit includes adjustable inlets for either side or bottom pipe entry, making installation easy and versatile.