The Big1.1 sits between the primary circuit and the terminal circuit and mixes the two to the right supply temperature. It fits air conditioning loops, radiant floor heating and cooling, and ceiling radiant systems. That makes it a core building block for villas, apartments, energy-efficient homes, and the WUHENG Climate System.

Precise Mixing Control with ±1 °C Accuracy

A proportional actuator drives the three-way mixing valve through three set positions: 0°, 45°, and 90°. The actuator blends primary and return water in the exact ratio the system needs. The station then holds the supply water temperature within ±1 °C of the setpoint, adjustable from 5 to 75 °C. Stable water temperature means stable room comfort. If power fails, the actuator can be moved by hand for testing or service.

Built-In Inverter Pump for Lower Energy Use

The circulation pump uses variable-frequency drive. It only works as hard as the system asks. When terminal demand drops, the pump slows down, and energy use drops with it. This cuts running costs and sharpens control response at the same time. Maximum head is 8.5 m, maximum flow is 2.8 m³/h, and maximum power draw is just 87 W.

EPP Insulation Stops Condensation

The station body is molded from EPP foam. The shell wraps every internal pipe run, so no cold surface is left exposed. In cooling mode this matters. Condensation forms on cold pipe surfaces, and dripping water damages walls and floors. The EPP shell keeps each pipe insulated, blocks condensation, and cuts standby heat loss. The material is also strong and pressure-resistant, so the housing protects the parts inside.

Smart IoT Ready

The Big1.1 connects to a smart IoT system. Once linked, the station can be monitored and controlled as part of a larger home automation setup. An RS485 interface handles communication with other equipment. The station fits neatly into the wider WUHENG Climate System, where climate control, ventilation, and distribution all work as one.

Built-In Level Indicator for Fast Installation

A spirit level is built right into the station body. The installer reads it during mounting and gets the unit straight on the first try. No separate tool is needed. Level mounting keeps the pump and valve seated correctly, which helps the station run quietly and last longer. Small detail, real time saved on site.

Core Technologies & Benefits

Several engineered parts work together inside the Big1.1:

• Inverter Circulation Pump: cuts energy use and improves control response across changing loads.

• Three-Way Proportional Mixing Valve & Actuator: the actuator drives the valve to 0°, 45°, or 90° and blends primary and return water for precise supply temperature; it is hand-adjustable when power is off.

• Control Box: one controller manages the pump, the valve, and RS485 communication.

• EPP Insulation Shell: insulates every pipe, prevents condensation, and resists pressure.

• Built-In Level Indicator: makes wall mounting fast and accurate.

Installation & Safety

• Wall mounting: fix the station to a solid wall and use the built-in level to check it sits straight.

• Connections: four G1″ male ports link the station to the primary and terminal circuits.

• Electrical safety: installation by qualified personnel only, with leakage protection on the supply.

• Pump protection: never run the pump dry.

• Operating limits: indoor use only, in an ambient temperature of 1 to 50 °C.

Technical Specifications

• Model: Big1.1 (Water Distribution AI Pump Station)

• Power Supply: AC 220V 50Hz

• Max Power Consumption: 87 W

• Working Medium: water

• Ambient Temperature: 1~50 °C

• Temperature Control Range: 5~75 °C

• Temperature Control Accuracy: ±1 °C

• Max Head: 8.5 m

• Max Flow Rate: 2.8 m³/h

• Max Working Pressure: 10 bar

• Connection Size: G1″ male (4 ports)

• Communication Interface: RS485

• Dimensions: 399 × 248 × 214 mm (wall-mounted)