FLOW CORE
The smart thermostatic head designed to save energy
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Connected
Quick setup via NFC from a smartphone
Remote control and monitoring via a LoRaWAN wireless network -
High-performance battery
6 years of standard battery life, up to 10 years depending on usage*
Runs on 2 replaceable AA lithium batteries -
Smart Control
Heating schedule stored in memory
: Automatically adjusts the temperature based on building usage
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Hot Water
Radiator -
LoRaWAN
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L2D1
Simple control. Local regulation. Remote monitoring.
FLOW CORE combines on-board control, NFC configuration, remote software updates, and centralized monitoring to modernize heating control without complicating the installation.
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Reduced overheating thanks to real-time measurement and optimised control
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Up to 10 years depending on use, with 2 AA lithium batteries to simplify maintenance
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Regulation maintained in the event of network connectivity loss
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Certified remote temperature sensor for reliable, consistent regulation
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Remote software updates to roll out new features
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Comfort, Eco, Frost Protection and Away modes to adapt to real-life usage
FLOW CORE: The Smart Thermostatic Head for Building Automation and Energy Efficiency
In a building, the heating system must be easy to control, reliable over time, remotely controllable, and fully integrated with Building Management Systems (BMS). FLOW CORE addresses these challenges with a compact, standalone thermostatic head that is easy to install.
FLOW CORE combines local control, long-lasting battery life, simplified configuration, centralized monitoring, and rugged field performance. Thanks to its connectivity, it integrates with energy management strategies and allows operators to monitor, adjust, and optimize heating throughout the building from their building management system (BMS) platform.
A solution designed for apartment buildings, hotels, offices, schools, and commercial buildings.
NODE: Measuring Temperature in the Right Place
The temperature near the radiator can be affected by convection, exposure to sunlight, a curtain, or a draft.
With the NODE** remote sensor and the Nexelec L2D1 wireless protocol, FLOW CORE’s control system uses a temperature that more accurately reflects the room’s conditions, providing a level of comfort that closely matches what you actually feel.
The L2D1 protocol provides a direct radio link between NODE and FLOW CORE, without the need for a gateway or a LoRaWAN network. Reliable local communication to improve control accuracy.
NODE has been issued a calibration certificate by an independent COFRAC-accredited metrology laboratory to ensure reliable control that meets the requirements for commercial buildings.
NODE Remote Sensor
The temperature is measured away from the radiator, directly in the room
Accuracy: ±0.5 °C
Fine-tuning of the thermostatic head to maintain a more stable set temperature
More consistent comfort
Heating control is based on measurements that more closely reflect how occupants feel
L2D1 Radio Link
Direct local communication between NODE and FLOW, without relying on the LoRaWAN network
Continuously adjustable heating, even without the
cloud or a wireless connection
FLOW CORE stores its heating schedules in memory. The LoRaWAN thermostatic head therefore continues to regulate the system even if network connectivity is temporarily unavailable.
The wireless network and the cloud are used to monitor, update settings, and report relevant information. It is not necessary to control each valve in real time.
Adjusting the temperature in 0.5 °C increments allows for finer tuning of the setpoint and improves room-by-room heating control.
Less reliance on the cloud
Control is not based on continuous remote commands
Onboard Scheduling
Heating scenarios are stored directly in the thermostatic head
Control Continuity
The heating system continues to operate even in the event of a temporary power outage
Optimized LoRaWAN Network
Radio communications are limited to status reports, alerts, settings, and updates
Simple setup and quick commissioning
FLOW CORE can be configured locally via contactless NFC technology using a smartphone, or remotely via the LoRaWAN network. This dual-approach simplifies installation and reduces commissioning time
For a large facility, settings can be configured in advance and then adjusted remotely based on the site’s needs
NFC Settings
Simple, fast, and contactless local configuration via a smartphone
On-site survey
5 colored tabs make it easy to identify equipment during installation and maintenance
Remote Configuration
Updating instructions, settings, and schedules via LoRaWAN
Simplified Installation
Compatible with a wide range of radiators thanks to the ADAPT** adapter line
Software that is updated remotely
FLOW CORE can receive remote software updates via the LoRaWAN network.
This allows the installed base to benefit from security patches, improvements, and new features without the need for routine on-site intervention.
This capability extends the operational lifespan of the equipment and simplifies maintenance for large-scale deployments.
The feature can leverage NAVIXIS, Nexelec’s IoT monitoring software, and its LoRaWAN gateways, with an end-to-end tested LoRaWAN FUOTA V2 pipeline: firmware preparation, network distribution, deployment monitoring, and fleet status monitoring.
Remote Update
Deployment of fixes and improvements, compatible with FUOTA V2 LoRaWAN
Continuous Evolution
Adding or optimizing features without replacing hardware
Reduced maintenance
Fewer on-site visits for software operations
Sustainable Park
LoRaWAN thermostatic heads that can be upgraded after installation
Up to 10 years of battery life with 2 lithium batteries
FLOW CORE runs on two replaceable AA lithium batteries. Thanks to its ultra-low-power electronic architecture, FLOW CORE can easily last for 6 years, and up to 10 years depending on settings and usage conditions*.
For building managers, this choice makes maintenance planning easier: the batteries are standard, replaceable, and designed for long-term use.
2 professional-grade AA lithium batteries
A simple, reliable, and easily replaceable power supply
6 years of standard battery life*
Fewer replacement installations in existing fleets
Mastered Technology
A proven solution based on batteries tested and validated by Nexelec
Scheduled Maintenance
Operations can be scheduled in advance based on usage patterns and battery status reports
Less maintenance, greater service continuity
Maintaining a fleet of LoRaWAN thermostatic heads involves more than just replacing batteries. It’s also important to minimize usage deviations, anticipate malfunctions, and avoid unnecessary trips.
Battery monitoring tracks energy levels and activates a red indicator light to help anticipate maintenance needs.
With its anti-seizing feature, open-window detection, control lockout, and remote monitoring, FLOW CORE helps reduce service calls and maintain service quality.
Anti-seize
Automatically activates the radiator mechanism once a month to prevent the thermostatic valve from becoming stuck when the heating system is not in use
Open Window Detection
Turn off the heat for 30 minutes to avoid wasting energy
Control Lock
Disables the manual adjustment dial to prevent any unintended local changes
Business Continuity
Fewer breakages, less misuse, fewer on-site service calls
NAVIXIS: Remote Heating Monitoring
With the NAVIXIS IoT monitoring software, FLOW CORE can be fully operated remotely.
The platform allows you to set temperatures, manage schedules, monitor equipment, and configure alerts.
For building managers, NAVIXIS provides a centralized view of the equipment fleet and simplifies maintenance without the need for routine on-site visits.
Remote Programming
Temperature Control and Heating Schedules
Centralized control
Equipment fleet tracking with exception management:
—including holidays, vacations, special schedules, or absences
Equipment Tracking
Battery, Condition, Operation, and Useful Operational Information
Configurable Alerts
Remote Maintenance and Prioritization of On-Site Service Calls
Safety, Protection, and Community Use
FLOW CORE is designed for use in multi-unit buildings. Its lockable base with a secure screw prevents unauthorized removal, while the anti-tear-out detection feature helps identify on-site anomalies.
For more exposed environments, the transparent CASE** outer shell provides enhanced protection against impacts, tampering, and attempts to disassemble the device.
Protective cover
CASE minimizes impacts, damage, and unauthorized access
Anti-theft protection
Lockable mounting base with a secure screw to prevent unauthorized removal
Anti-tear detection
An alert is triggered if the head is removed from its base
Specifications
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Temperature
Res. : 0.1°C
Previous: ±0.4°C
Features
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Connectivity
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Power supply
2 1.5V AA lithium batteries
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Dimensions
91 x 58 mm
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Terms of use
Indoor environment
Temperature: -20°C to +60°C
Humidity: 0% RH to 99% RH (non-condensing)
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Radiator Interface
M30 x 1.5 mm
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Warranty
2 years*
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Certifications
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Set contents
1 FLOW CORE s with thermostatic head
5 colored labeling tabs
1 anti-theft screw
2 Energizer Ultimate Lithium AA batteries
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Engine
Stepper Motor with Micrometric Positioning
Reference
| Reference | Radio |
|---|---|
| A300LS | LoRaWAN |
A solution for buildings where heating needs to be controlled simply
Control heating room by room with a solution that’s simple to deploy and suited to renovation projects.
Adjust temperature settings according to room occupancy to reduce unnecessary energy consumption.
Schedule temperatures according to operating hours, zones and periods of non-occupancy.
Reduce local adjustments with control locking and remote monitoring.
Maintain a stable temperature in occupied areas while reducing technical interventions.
ADAPT: Simplifying Installation on Existing Radiators
The ADAPT kit includes a set of 6 adapters needed to install the FLOW CORE thermostatic head on most faucets on the market.
A simple solution to speed up installation, minimize on-site surprises, and facilitate renovations.
Compatible with: Danfoss RA valves, Danfoss RAV valves, Danfoss RAVL valves, Cale valves, Giacomini valves, M28 valves.
CASE: Protecting the thermostatic head in a communal setting
The CASE protective cover enhances the thermostatic head’s mechanical protection against impacts, unauthorized tampering, and attempts to disassemble it.
The protective cover restricts access to the adjustment knob to prevent local changes to the setpoint, while helping to reduce damage, replacements, and on-site maintenance visits.
Superior performance for optimal LoRaWAN data transmission
No more data loss!
Historical Data Mode + Redundancy Feature: Measurements and statuses can be grouped into a single LoRaWAN frame to limit the number of radio transmissions and are sent three times to maximize the likelihood of successful reception by the network gateway.
Optimized radio antenna
Designed to ensure reliable radio connectivity, even in harsh environments, while minimizing the thermostatic head’s power consumption to extend its battery life.
Enhanced cyber security
The data transmitted by the product is secured end-to-end using AES-128 double encryption.
A thermostatic head built to last
Nexelec’s commitment to more responsible electronics is part of a structured CSR approach, as recognized by the company’s award of the EcoVadis Bronze medal.
FLOW CORE was designed with this approach in mind: sustainable design, replaceable batteries, remote maintenance, software updates via LoRaWAN, and removable accessories all help extend the product’s lifespan and minimize the need for on-site service calls.
The FLOW CORE thermostatic head was also designed to facilitate maintenance, the replacement of wear parts, and end-of-life disposal, in line with eco-design principles and the goal of reducing environmental impact.
A connected, discreet, and elegant thermostatic head
With its compact design and built-in display, FLOW CORE fits easily into homes, hotels, offices, and multi-unit buildings.
* Battery life is not guaranteed and may vary depending on the product’s settings and usage.
** Optional accessory.