Fan Coil Control Based on LoRaWAN – WT303 and WT304 in Practice
- Lévai Krisztina
- 6 days ago
- 3 min read
Updated: 6 hours ago
Modern buildings place increasing demands on HVAC systems, including efficient energy use, remote management, and adaptation to user behavior. This is especially true for hotels, apartment buildings, and rental residential projects, where operators must ensure both comfort and cost-effective operation at the same time.
The Milesight WT303 and WT304 LoRaWAN Fan Coil Thermostats are designed to address these challenges by offering a modern, easily integrable solution.
WT303 & WT304 – Flexible Control for 2-Pipe and 4-Pipe Fan Coil Systems
The WT303 and WT304 thermostats can be configured for both 2-pipe and 4-pipe fan coil systems, making them suitable for a wide range of HVAC configurations.
Key technical capabilities:
relay-based or 0–10 V valve control,
3-speed fan control with EC fan support,
LoRaWAN communication for easy and scalable integration.
Wireless communication is particularly advantageous in retrofit projects and larger buildings, where cabling can be costly or difficult to implement.
Advanced Features for Comfort and Energy Efficiency
The WT303 and WT304 offer much more than basic temperature control – a range of advanced functions support efficient operation:
❄️ Anti-freeze protection – enabled by default to protect indoor equipment at low temperatures
🪟 Window-opening detection – pauses heating or cooling to prevent energy waste
💧 Temperature-regulated dehumidification control – optimized comfort and humidity management
⏱️ Schedules and timing functions – up to 8 custom programs with 16 execution times
🔒 Comfort and protection features – child lock, mode lock, fan delay shutdown, alarms
Together, these functions significantly contribute to reduced energy consumption and improved system reliability.
WT303 vs. WT304 – Fan Coil Compatibility and Control Options
Feature / Configuration | WT303 | WT304 |
Fan coil system | 2-pipe, 4-pipe | 2-pipe, 4-pipe |
Fan control | 3-speed fan control (relay-based / AC fan) | 3-speed fan or EC fan (0–10 V control) |
Valve control – On/Off | ✔️ 2-wire On/Off valve ✔️ 3-wire On/Off valve | ✔️ 2-wire On/Off valve ✔️ 3-wire On/Off valve |
Valve control – 0–10 V | ❌ Not supported | ✔️ 0–10 V proportional valve |
2-pipe system + On/Off valve | ✔️ | ✔️ |
4-pipe system + On/Off valve | ✔️ | ✔️ |
2-pipe system + 0–10 V valve | ❌ | ✔️ |
4-pipe system + 0–10 V valve | ❌ | ✔️ |
EC fan + 0–10 V control | ❌ | ✔️ |
Typical application | standard fan coil systems | modulating, energy-efficient systems |
More complex HVAC projects | – | ✔️ |
How to Choose the Right Model?
🔹 WT303 – for proven, straightforward solutions
The WT303 is an ideal choice for:
2-pipe or 4-pipe fan coil systems,
On/Off valve configurations (2- or 3-wire),
classic 3-speed or EC fans,
projects where simple installation and stable operation are key.
👉 Recommended for offices, apartments, and standard hotel rooms.
🔹 WT304 – when modulation and energy efficiency matter
The WT304 is recommended when:
0–10 V proportional valve control is required,
finer temperature regulation and energy optimization are important,
EC fan-based fan coil units are used,
larger or more complex HVAC systems need to be controlled.
👉 Ideal for modern hotels, build-to-rent projects, office buildings, and commercial facilities.
Typical System Architecture and Application
In multi-unit residential buildings and accommodation facilities, there is often a need for room-level HVAC control, individual scheduling, and centralized energy monitoring.
The solution is built around the following components:
WT30x fan coil thermostats for room-level control,
Milesight LoRaWAN gateways for reliable data communication,
Milesight IoT platform for centralized management and data visualization.
The system enables:
remote control and scheduling of heating and cooling for each unit,
locking and limitation functions to prevent undesired usage,
real-time data collection for energy analysis.
👉 The result is an easily integrable, scalable HVAC control concept that delivers greater operational control, improved energy efficiency, and transparent system operation across various project types.
Summary – Fan Coil Control with Simple Integration
The Milesight WT303 and WT304 thermostats provide a reliable, future-ready solution for fan coil control, particularly in environments where remote management and energy efficiency are essential.
At SmartNode, the products are available along with:
professional consulting,
system integration support,
and project-level assistance.
👉 Contact us, and we will help you find the solution
that best fits your project requirements.
(Source: Milesight, SmartNode Kft, Canva)
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