Quick Summary
The HTW-WF01-3A3 Wifi Water Heating Thermostat is designed for water-based heating systems. It controls heating equipment through NC, NO, and COM output terminals. The thermostat operates on a 100–240 Vac power supply. WiFi connectivity allows users to manage heating through a mobile application.
This page explains how the Wifi Water Heating Thermostat works in real heating systems. It introduces control logic and practical functions. Wiring reference and technical parameters are also provided. OEM and ODM possibilities for the Wifi Water Heating Thermostat are briefly explained.

Key Features
(This section explains the core control functions and their practical value.)
1. Water Heating Control Output
This Wifi Water Heating Thermostat provides a stable 3A control output. The output suits common water heating valves or pumps. NC, NO, and COM terminals support flexible wiring in many heating installations.
2. WiFi Remote Control
Built-in WiFi allows the thermostat to connect with a mobile application. Users can adjust temperature settings from anywhere. This improves heating control convenience for homes and small buildings.(If you don’t need wifi, please click here)
3. Programmable Temperature Schedule
The thermostat supports programmable temperature periods during the day. Users can set different temperatures for different schedules. This allows heating to operate only when necessary.
4. External Temperature Sensor Protection
The thermostat supports connection with an external temperature sensor. The sensor continuously monitors the heating system temperature. This protection helps prevent overheating and ensures safe and stable operation.

Product Design and Display
The thermostat appearance and interface layout to fully grasp the display effect and performance of the thermostat in real-world use

Technical Specifications
(Key parameters for reference and project confirmation.)
| Parameter | Value |
|---|---|
| Power Supply | 100–240 Vac, 50/60 Hz |
| Output Load | 3A for water/boiler heating; 16A for electric heating |
| Built-in Sensor | NTC3950, 10K |
| Setpoint Range | 5–35°C |
| External Sensor | Supported |
| Installation | 86×86 mm junction box or EU round box |
| Protection Class | IP20 |
| Warranty | 2 years |
Wiring Diagram
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.)
| Heating series | xx stands for |
|---|---|
| 3A | Water Heating, with NC+NO+COM output terminals |
| 16A | Electric Underfloor Heating, with L+N voltage output terminals + External Sensor |
| NV | Boiler Heating, with Non-Voltage Dry Contact |
| 1 / 2 / 3 | 1 = Standalone, 2 = Modbus, 3 = Wi-Fi |
| Example HTW-WF01-xx | If xx = 16A3, it means electric underfloor heating with external sensor and WiFi function. Most sub-models are ready-made. Kindly contact us to confirm availability. |
Project Fit & Customization
(This section explains where the product can be used, its limits, and OEM/ODM options.)
This Wifi Water Heating Thermostat is not designed for high power electric heating loads. Loads above 3A require other thermostat models. The device is also not intended for industrial heating equipment. Outdoor installations or humid environments may require thermostats with higher protection levels. Systems requiring Modbus communication or BMS integration should select other compatible models.
Despite these limits mentioned above, some function customisation may still be discussed. ODM cooperation can adjust communication type or control logic. Our engineers normally review system wiring and heating structure first. After evaluation we suggest possible technical options for the project.
OEM customisation is also available for brand projects. Logo printing on the thermostat panel can be arranged. Packaging design and product labels may also be customised. These options help the Wifi Water Heating Thermostat match different project or brand requirements.
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. What heating systems can this Wifi Water Heating Thermostat control?
It is designed for water heating systems. NC, NO, and COM outputs allow switching control for heating valves or circulation pumps.
Q2. Can users control the thermostat remotely through WiFi?
Yes. The thermostat connects to a mobile application through WiFi. Users can adjust temperature settings remotely and manage heating more easily.
Q3. Is the thermostat compatible with standard wall boxes?
Yes. The device fits standard 86×86 mm junction boxes and EU round wall boxes used in most heating installations.
Q4. What is the minimum order quantity and are samples available?
Sample units are available for evaluation. The typical minimum order quantity is about 300 pieces, though smaller trial quantities may sometimes be discussed.
Q5. How can we place an order?
Please contact us with your requirements. After confirmation we provide a proforma invoice. Payment methods include TT, PayPal, Visa and similar options.
Q6. How are the products usually shipped?
Express door-to-door delivery usually takes around seven days. Air freight takes similar time. Sea freight normally requires more than one month.
Need Support?
If you are selecting a Wifi Water Heating Thermostat for a project, please contact us. Our team can help confirm wiring compatibility and suitable model selection.
Related Thermostat Models
More product details, please click directly:
Electric Underfloor Heating Thermostat






