Quick Summary
HTW-WF06-FC-4W is a smart thermostat with wifi designed for 4-pipe fan coil systems. It controls a multi-speed fan and two motorised valves. It manages heating and cooling operation using relay outputs. Wifi connection allows remote monitoring and control.
This page explains how this smart thermostat with wifi works in real FCU projects. It covers control logic, wiring reference, and key parameters. It also explains model selection and common issues. OEM and ODM options may be discussed for project needs.

Key Features
(This section introduces the main control functions and their engineering value in FCU systems.)
(01) Room-Level Control
This smart thermostat with wifi controls fan speed and two valves independently. It helps maintain stable room temperature. It also reduces reliance on central systems.
(02) Programmable Scheduling
Daily and weekly schedules improve energy use and comfort. This reduces manual adjustment needs. It also supports stable HVAC operation in hotel and office projects.
(03) Wifi Connectivity
Wifi connection allows remote access through a mobile app. Engineers can check system status easily. It helps reduce on-site maintenance work.(2 pipe with wifi click here)
(04) Clear Visual Feedback
The display shows mode, temperature, and output status clearly. This helps quick on-site checks. It improves maintenance efficiency during daily operation.

Product Design and Display
(This section shows the thermostat appearance, screen interface, and installation dimensions of this model.)
The thermostat appearance and interface layout to fully grasp the display effect and performance of the thermostat in real-world use

Technical Specifications
(This section lists the key technical parameters relevant to this thermostat model.)
| Parameter | Value |
|---|---|
| Power Supply | 110–230 VAC |
| Frequency | 50/60Hz |
| Accuracy | ±0.5°C |
| Fan Relay Load | 5A |
| Valve Relay Load | 3A |
| Setpoint Range | 5–35°C |
| Installation | EU or standard box |
| Protection Class | IP20 |
Wiring Diagram
(This section provides the wiring diagram for this thermostat in FCU control systems.)
Clear wiring references to help you complete the installation quickly and correctly

Model Code Guide
(This section explains what configuration the model code refers to.)
| Fan coil series | xx stands for |
|---|---|
| 2/4 | 2 pipe or 4 pipe system |
| W | Wi-Fi |
| N | Modbus |
| K/E | Keycard or external sensor |
| 24 | 24V supply or output |
| Example HTW-WF06-FC-xx | If xx = 4W, it stands for 2 pipe, Wifi |
Project Fit & Customization
(This section describes project suitability, system limitations, and available customization options.)
This smart thermostat with wifi is not suitable for BMS integration systems. It does not support Modbus or BACnet communication. It is also not designed for outdoor or wet environments.
Despite these limitations mentioned above, ODM customization is possible. Wifi function, control logic, or display can be adjusted. Our engineers review system requirements before confirming solutions.
OEM customization is also supported for brand projects. Logo printing, panel colour, and labels can be adjusted. Packaging and manuals can also be customised.
Certifications and Compliance
(This thermostat complies with European market requirements and is supported by certifications such as CE, RoHS, LVD test reports, EMC test reports, etc)

Exhibition Moments
(Our team regularly participates in international HVAC exhibitions such as Febrava in Brazil, The Big 5 in Dubai, and ISK-SODEX in Turkey, etc.)

Frequently Asked Questions
Q1. Is this thermostat suitable for 4 pipe FCU systems?
Yes. It independently controls fan and valves. This ensures stable room temperature and reliable operation.
Q2. Can it work without BMS integration?
Yes. It operates independently without central systems. It is suitable for room-based control projects.
Q3. Does it support external sensors?
Yes. External sensors can be connected. This improves temperature accuracy in larger spaces.
Q4. How to choose the correct model?
Check system type and valve control. Confirm communication and installation requirements before selection.
Q5. What is the MOQ and are samples available?
Samples are supported. Standard MOQ is 300 units. Smaller trial quantities such as 100 units may be discussed.
Q6. How to place an order?
Contact us to confirm requirements. We provide PI after confirmation. Payment supports TT, PayPal, Visa, with EXW, FOB, DAP terms.
Q7. How long is the lead time?
Samples ship within 7 days. Custom orders take 3–5 weeks. Batch orders around 300 units need about one month.
Q8. How are products shipped?
Express delivery takes about 7 days. Air freight is similar. Sea shipping usually takes around one month.
Need Support?
If you need help selecting or applying this thermostat, please contact us. Our team can support your project planning and technical decisions.





