Mixing Centre

Name: Mixing Centre
Brand: ACE FORGE HVAC

Brass mixing centre with temperature gauge and circulation pump, used to hold a fixed supply temperature on hydronic heat pump circuits.

Request a quote Talk to an engineer

Specifications

Mixing Centre — key specifications
Parameter	Value
Connection	G1"
Control range — high temperature version	30–70°C, with circulation pump
Control range — low temperature version	20–45°C, with circulation pump
Maximum working temperature	100°C (high) / 90°C (low)
Working pressure	10 bar
Control accuracy	± 1°C (high) / ± 3°C (low)
Supplied with	Temperature gauge on the body

Values as published in the 2026 product catalogue. Ask us for the model-level submittal sheet before specifying.

Features

✓Holds a fixed supply temperature to the circuit — the mixing function that lower-temperature emitters need
✓Temperature gauge on the body, so supply temperature can be checked on site without separate instruments
✓Two control ranges covering both higher- and lower-temperature emitter types

Overview

A mixing centre holds the water temperature leaving the plant at a fixed value instead of letting it follow whatever the heat pump is producing. It combines a brass mixing body, a temperature gauge and a circulation pump on one G1" assembly, so the supply temperature to the emitters can be set and then checked on site without a separate instrument. Two control ranges are offered: a higher-temperature version for 30–70°C and a lower-temperature version for 20–45°C.

The reason this matters is that a heat pump wants to run cool and long while many existing emitters were sized for water at 70°C or more. A mixing centre is what reconciles the two: the heat pump runs at its own efficiency, the circuit receives the temperature the emitters need, and the gauge makes the result visible rather than assumed. It sits naturally alongside the anti-freeze valve and the magnetic filter on the same hydronic circuit.

Where it is used

Hydronic heat pump systems feeding existing radiators or fan coils that need a capped supply temperature
Underfloor or low-temperature circuits that must be protected from the plant supply temperature
Buffer-tank and plant-room assemblies where a fixed secondary supply temperature is required
Retrofit projects replacing a boiler with a heat pump while keeping the existing emitter circuit

Selection & installation notes

01
Choose the control range from the emitter circuit, not from the heat pump: 30–70°C where radiators need higher water, 20–45°C where the circuit is low temperature.
02
The two versions differ in accuracy as well as range — ±1°C on the higher-temperature version, ±3°C on the lower one. Where tight control matters, that difference should drive the choice.
03
Both versions work to 10 bar with a maximum working temperature of 100°C (higher range) or 90°C (lower range).
04
Plan the gauge position so it can be read without dismantling insulation — its whole purpose is to make the supply temperature checkable during commissioning and service.

Common questions

What is the difference between the two versions?

One has a 30–70°C control range with a circulation pump, a maximum working temperature of 100°C and ±1°C accuracy. The other covers 20–45°C with a circulation pump, 90°C maximum and ±3°C accuracy. Both are G1" brass assemblies with a temperature gauge and work to 10 bar.

Can it be used with a boiler as well as a heat pump?

The assembly holds a set supply temperature on a hydronic circuit, which is not specific to the heat source. Whether a particular installation is acceptable is a question for the authority having jurisdiction and the system designer, so confirm the arrangement for the project.

Is a separate pump still needed?

The mixing centre is supplied with a circulation pump as part of the assembly. Whether the project needs additional pumping depends on the circuit — confirm the hydraulic design with the system designer.