Quick Summary
The HTW-WKT18-NV3 WiFi Wireless Boiler Heating Thermostat is designed for boiler heating systems. It uses wireless communication between control panel and receiver. It supports WiFi remote control and internal temperature sensing. This ensures stable boiler control and flexible installation without complex wiring.
This page explains how this WiFi Wireless Boiler Heating Thermostat works in real applications. It includes control logic, wiring reference, and technical parameters. It also covers installation guidance and common project questions. Basic OEM and ODM options are included to support different project needs.
Key Features
(This section explains the core control functions and their practical value.)
01 Wireless control structure
This WiFi Wireless Boiler Heating Thermostat uses a panel and receiver design. It avoids direct wiring between thermostat and boiler. This simplifies installation and improves flexibility in both retrofit and new projects. If you are interested in thermostats for water heating, please refer to this link: HTW-WKT18-3A3.
02 WiFi remote control capability
The WiFi Wireless Boiler Heating Thermostat connects to mobile applications via WiFi. It allows remote temperature adjustment and monitoring. This helps manage heating systems more efficiently across multiple rooms or locations.
03 Internal temperature sensing
The WiFi Wireless Boiler Heating Thermostat uses a built-in NTC sensor for temperature detection. It provides stable and consistent readings for control logic. This ensures reliable system response during daily operation.
04 Stable relay output for boiler control
The receiver provides relay output for boiler systems with 3A load. It supports stable switching during operation. This improves overall system reliability and reduces control issues.
Product Design and Display
(This section shows the product’s dimensions and the interface layout.)

The thermostat features an LED display with capacitive touch buttons. The panel has a clean and modern appearance. The receiver is compact and wall-mounted. The design supports easy installation and clear operation in indoor environments.
Technical Specifications
(This section lists the key parameters for reference and project confirmation.)
| Parameter | Value |
|---|---|
| Receiver Power Supply | 95~240V AC, 50/60Hz |
| Panel Power Supply | 2 × AA Battery / USB |
| Relay Load | 3A (boiler), 16A (electric) |
| Accuracy | 0.5°C |
| Temperature Range | 5~35°C |
| Sensor | NTC3950, 10K |
| Ambient Condition | 0~45°C, 5~95% RH |
| Protection Class | IP20 |
Wiring Diagram
(This section provides the wiring reference diagram of this WiFi Wireless Boiler Heating Thermostat for correct installation.)

The receiver connects directly to the boiler using relay terminals. The panel communicates wirelessly with the receiver. Proper pairing ensures stable signal transmission and reliable heating control.
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 line voltage output terminals + External Sensor |
| NV | Boiler Heating, with Non-Voltage Dry Contact |
| 1/3 | 1 = Standalone, 3 = Wi-Fi |
| Example HTW-WF11-xx: if xx = 16A3, it stands for electric floor heating with external sensor support and Wi-Fi 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 Wireless Boiler Heating Thermostat is not suitable for wired control systems. It does not support BMS protocols such as Modbus or BACnet. It is also not designed for electric floor heating systems.
Despite these limits mentioned above, ODM customisation can be discussed. Control logic and communication settings may be adjusted. Interface and function changes can be evaluated. Final solutions depend on project feasibility.
OEM customisation is supported for branding and appearance. This includes logo printing, colour options, and packaging design. Label and interface adjustments can also be discussed. These options help meet different market requirements.
Certificates and Compliance


Frequently Asked Questions
Q1. Can this thermostat be used for boiler heating systems?
Yes, it is designed for boiler heating systems and provides relay output control through the receiver unit.
Q2. Does this WiFi Wireless Boiler Heating Thermostat require wiring between panel and receiver?
No, it uses wireless communication between the panel and receiver, reducing installation complexity.
Q3. Does this WiFi Wireless Boiler Heating Thermostat support remote control via mobile app?
Yes, it supports WiFi connection and allows control through mobile applications for flexible operation.
Q4. What is the minimum order quantity and do you support samples?
We support sample orders. Standard MOQ is 300 units, but smaller trial quantities can be discussed based on project needs.
Q5. How can we place an order?
Please contact us to confirm requirements. We will provide a proforma invoice. Payment supports TT, PayPal, Visa, and terms like EXW, FOB, or DAP.
Q6. How will the products be shipped?
Express delivery is recommended and takes about 7 days. Air freight is similar. Sea shipping takes over one month depending on destination.
Related Thermostat Models
For projects requiring wired systems or electric heating control, other models may be more suitable. Please contact us for project advice and model selection support. You can also refer to below links:
Electric Underfloor Heating Thermostat
Water Underfloor Heating Thermostat
This WiFi Wireless Boiler Heating Thermostat is suitable for projects needing flexible wireless installation and simple control. It is commonly used in residential and retrofit scenarios. For projects requiring BMS integration or wired control, other thermostat types should be selected. 【More models: heating thermostat】






