Quick Summary
The HTW-WF01-FC-4N is designed for indoor fan coil unit systems in homes and commercial buildings. It supports both 2-pipe and 4-pipe systems, with 4-pipe as default. The thermostat controls fan speed and heating and cooling valves. It uses simple on/off logic to keep room temperature stable.
This Hvac Thermostat is suitable for projects that need reliable control and BMS connection. This Hvac Thermostat supports Modbus communication for central control. It helps improve system coordination and daily operation. The content below shows key functions, control logic, and main parameters clearly.

Key Features
These functions support stable control and flexible HVAC use.
(01) White and black colour options
Two colour options are available. This helps match different room styles. This Hvac Thermostat fits both modern and simple interiors.
(02) 2-pipe and 4-pipe system support
The thermostat can work with both 2-pipe and 4-pipe systems. The default is 4-pipe. This Hvac Thermostat adapts to different system layouts.
(03) Fan coil and valve control
The thermostat controls fan coil units and two wired motorized valves. It manages heating and cooling output. This Hvac Thermostat keeps room temperature stable.
(04) Programming function
The weekly schedule allows automatic control. It helps reduce energy use during idle time. This Hvac Thermostat improves efficiency.
(05) Modbus communication
Modbus allows connection to building systems. It supports central monitoring and control. This Hvac Thermostat fits BMS projects.

Product Design and Display
The design of Hvac Thermostat is simple and practical. It fits indoor wall installation. The interface is easy to read. Buttons are clear and responsive. This Hvac Thermostat is easy for daily use.

Technical Specifications
Key parameters are listed below for installation and system matching.
| Parameter | Value |
|---|---|
| Power Supply | 95–240VAC, 50/60Hz |
| Power Consumption | 5A |
| Set Range | 5–35°C |
| Accuracy | ±0.5°C or ±1°F |
| Installation | EU or Standard Electric Box |
| Protection Level | IP20 |
| Shell Material | PC+ABS (Fireproof) |
| Warranty | 2 Years |
Wiring Diagram
The wiring includes fan speed outputs and valve connections. It supports heating and cooling control. Modbus wiring is also included. This Hvac Thermostat is simple to install.

Model Code Guide
This section explains what each part of the model code means for system configuration.
| Fan coil series | xx stands for |
| 2 | 2-pipe fan coil system |
| 4 | 4-pipe fan coil system |
| W | WiFi |
| EC | EC fan 0-10V |
| B | BACnet |
| N | Modbus communication |
| K | Keycard |
| E | External sensor |
| M | 0-10V modulating valve |
| Example WF01-FC-XX | If XX=2N, it means 2 pipe FCU thermostat with Modbus function(If you need this, click here) |
Project Fit & Customization
This model is suitable for residential and commercial HVAC projects. It supports room control and system connection. This Hvac Thermostat is not designed for modulating systems.
Some functions can be adjusted. Communication and control logic can be modified. Interface settings can also be discussed. This Hvac Thermostat supports flexible project needs.
OEM support is available. Logo, colour, and packaging can be customised. This Hvac Thermostat can match different markets.
Certifications and Compliance
The thermostat meets common HVAC standards. It supports safe and stable operation. This Hvac Thermostat is suitable for long-term use.

Exhibition Moments
The product is shown in HVAC exhibitions. This helps improve design and application. This Hvac Thermostat is used in many projects.

Frequently Asked Questions
Q1: Does this thermostat support BMS integration?
Yes, it supports Modbus. This Hvac Thermostat can connect to building systems.
Q2: Can it work with both 2-pipe and 4-pipe systems?
Yes, it supports both. This Hvac Thermostat is flexible.
Q3: Can it control fan speed?
Yes, it supports fan speed control. This Hvac Thermostat adjusts airflow.
Q4: Does it support programming?
Yes, it supports weekly scheduling. This Hvac Thermostat helps manage temperature.
Q5: What is the MOQ and can I get samples?
MOQ is 300 units. Samples are available. Smaller orders can be discussed.
Q6: How to place an order and arrange shipping?
Contact us for PI. Payment supports TT and PayPal. Shipping supports EXW, FOB, and DAP.
Q7: How long does production take?
Samples take about 7 days. Custom orders take 3–5 weeks. Bulk orders need about one month.
Q8: What shipping methods are available?
Express takes about 7 days. Air is similar. Sea shipping takes about one month.
Need Support?
If you are selecting a model or planning a project, please contact us. We can help match the right thermostat.
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HVAC systems need stable and simple control. This Hvac Thermostat supports reliable operation and system integration. It helps improve comfort and supports efficient building management.






