Quick Summary

HTW-HT09-16A3 is a WiFi electrical underfloor heating thermostat for electric floor heating systems. It uses 16A line voltage output for direct load control. Internal and external sensors support accurate temperature regulation. This WiFi electrical underfloor heating thermostat ensures stable indoor heating control.

This page explains how the WiFi electrical underfloor heating thermostat works in real use. It includes control logic, wiring reference and key technical parameters. Model structure and project customisation options are also explained. Typical installation questions and practical guidance are provided.

Key Features

(This section explains the core control functions and their practical value.)

01. Direct 16A Electric Heating Control
The WiFi electrical underfloor heating thermostat uses 16A line voltage output. It directly switches electric floor heating cables or mats. This simplifies installation and ensures stable heating operation in residential projects. We also have standalone model HTW-HT09-16A1.

02. Dual Sensor Temperature Control
Internal and external sensors work together for accurate measurement. Floor and room temperatures can be monitored separately. This helps avoid overheating and improves heating safety.

03. WiFi App Control with Multi-language Support
The thermostat connects to the Tuya app through WiFi. Users can control heating remotely and adjust settings easily. Multi-language support improves usability across international projects.

Product Design and Display

(This section shows the product’s dimensions and the interface layout.)

Technical Specifications

(This section lists the key parameters for reference and project confirmation.)

Parameter	Value
Power Supply	100~240Vac
Frequency	50/60Hz
Accuracy	±0.5°C or ±1°F
Sensor	NTC3950, 10K
Setpoint Range	5~35°C
Display Range	5~99°C
Installation	EU or Standard Electric Box Housing
Material	PC + ABS (Fireproof), IP20

Wiring Diagram

(This section provides the wiring reference diagram for correct installation.)

Model Code Guide

(This section explains what configuration the model code refers to.)

Heating series	xx stands for
16A	Electric Underfloor Heating, with L+N line voltage output terminals + External Sensor
3	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 thermostat is not suitable for water heating or boiler systems. It does not support valve control or dry contact switching. Projects requiring mixed heating systems should use dedicated controllers.

It is not designed for industrial BMS integration systems. Protocols such as Modbus or BACnet are not supported. Centralised control projects should select communication-enabled thermostats.

Despite these limits mentioned above, functional adjustment may be discussed. WiFi behaviour or control logic may be adapted based on project needs. All changes depend on technical feasibility and production conditions. OEM customisation such as logo printing and packaging is supported.

Certificates and Compliance

Certification documents for Swan Controls thermostats

Swan Controls presenting thermostats at an international HVAC exhibition

Frequently Asked Questions

Can this WiFi electrical underfloor heating thermostat control all floor heating systems?

It is designed for electric floor heating systems only. It directly controls heating cables or mats using line voltage output.

How do the sensors improve temperature accuracy?

The thermostat uses internal and external sensors. This allows better control of room and floor temperature, improving comfort and preventing overheating.

Can this thermostat connect to a building management system?

No. This is a WiFi standalone thermostat. It does not support Modbus or BACnet integration with central building systems.

What is the minimum order quantity and can I get samples?

Thermostat samples are available. The usual minimum order quantity is about 300 units, but smaller trial quantities may also be discussed.

How can I place an order?

Please contact us to confirm your requirements. We will provide a proforma invoice. Payment supports TT, PayPal, Visa, with EXW, FOB, DAP terms.

How will the products be shipped?

Express delivery is recommended and takes around seven days. Air freight is similar, while sea shipping takes about one month depending on destination.

Need Support?

If you need help selecting other version thermostats, please contact us. Our team can support your project and application requirements. You also can refer to below links:

Electric Underfloor Heating Thermostat

Water Underfloor Heating Thermostat