Quick Summary
The HTW-MT08-FC-4W is designed for fan coil systems that need stable and flexible control. It supports 4 pipe heating and cooling systems. It controls fan coil units and motorized valves. It helps keep room temperature stable in daily use.
This Indoor Wifi Thermostat is suitable for residential and light commercial HVAC systems. It supports WiFi control and programmable settings. It helps reduce manual adjustment and improve comfort. The sections below show how each function works in real use.

Key Functional Highlights
These functions support stable HVAC operation and simple control.
(01) Black and white design
The thermostat comes in black and white. It fits different room styles. The design is simple and modern. This thermostat suits indoor environments.
(02) Fan coil unit 4 pipe system
The thermostat supports 4 pipe fan coil systems. Heating and cooling are controlled separately. This allows flexible system operation. This thermostat fits modern HVAC systems.
(03) Programmable control
The thermostat supports time scheduling. Users can set temperature by time periods. This helps reduce energy use. This thermostat improves daily efficiency.
(04) WiFi communication
The thermostat supports WiFi. Users can control the system through a mobile app. This allows remote access. This thermostat improves convenience.
(05) Fan coil and valve control
The thermostat controls fan coil units and motorized valves. It supports heating and cooling output. This thermostat supports stable system control.

Product Design and Display
The design is simple and modern. It uses a VA screen for clear display. It is suitable for indoor use. The touch buttons are responsive. This Indoor Wifi Thermostat is suitable for homes and offices.

Technical Specifications
Key parameters are listed below for installation and system matching.
| Parameter | Value |
|---|---|
| Power Supply | 95–240 V AC (24 V upon customisation) |
| Fan Relay | 5A (Resistance) / 3A (Inductive) |
| Valve Relay | 3A (Resistance) / 1A (Inductive) |
| Sensor | NTC3950, 10K |
| Set Range | 5–35°C |
| Accuracy | ±0.5°C |
| Display Range | 5–99°C |
| Ambient Temp. | 0–45°C |
| Humidity | 5–95% RH |
| Power Consumption | <1.5W |
| Installation | 86×86 mm or EU 60mm round box |
| Protection Level | IP20 |
| Shell Material | PC+ABS (Fireproof) |
| Warranty | 2 Years |
Wiring and Installation
The thermostat connects to fan coil units and motorized valves. It supports heating and cooling output wiring. WiFi connects to mobile devices for control. This Indoor Wifi Thermostat helps simplify installation and daily operation.

Project Fit & Customization
This model is suitable for residential and light commercial HVAC systems. It supports 4 pipe fan coil systems and WiFi control. This Indoor Wifi Thermostat is widely used in apartments and offices.
Some functions can be adjusted. Control logic or interface can be discussed. This Indoor Wifi Thermostat supports flexible project needs.
OEM support is available. Logo, colour, and labels can be customised. This Indoor Wifi Thermostat can match different markets.
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: Does it support WiFi control?
Yes, it supports WiFi. This Indoor Wifi Thermostat allows remote control.
Q2: Is it suitable for 4 pipe systems?
Yes, it supports 4 pipe fan coil systems. Heating and cooling are separate. If you’re looking for 2 pipe version, please chech here: HTW-MT08-FC -2W
Q3: Can it control valves and fan coil together?
Yes, it supports both. This Indoor Wifi Thermostat controls valves and fan units.
Q4: Does it support programmable operation?
Yes, it supports scheduling. This helps improve energy efficiency.
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?
Contact us for PI. Payment supports TT and PayPal. Shipping supports EXW, FOB, and DAP.
Q7: How long is the lead time?
Samples take about 7 days. Custom orders take 3–5 weeks. Bulk orders need about one month.
Q8: What shipping options 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 choose the right thermostat.
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Smart control is important in HVAC systems. This Indoor Wifi Thermostat supports remote control and stable operation. It helps improve comfort and system efficiency.






