Brink Flair
Controls Brink Flair ventilation units via CO2-based airflow regulation over Modbus.
Template for Brink Flair 225-600 heat recovery ventilation units over Modbus RTU. Reads sensor data such as temperatures, humidity, CO2 levels, fan speeds, and pressures. Writes airflow presets, CO2 thresholds, bypass settings, and postheater setpoints for CO2-based airflow regulation.
- Protocol
- Modbus RTU
- Connection
- RS485, 19200 baud
- Registers
- 150, read and write
- Brand
- Brink
- Key readings
- Supply and exhaust airflow (m3/h) · Supply and exhaust fan speed (RPM) · Temperature sensors (NTC1, NTC2, exhaust) · CO2 sensor values (1-4) · Relative humidity (inlet, exhaust, RHT) · Supply and exhaust pressure (Pa)
- Available commands
- Flow presets 0-3 · CO2 sensor low/high levels · Bypass mode and temperature settings · Postheater setpoint
- Compatible models
- BRINK Flair 225 · BRINK Flair 325 · BRINK Flair 400 · BRINK Flair 450 · BRINK Flair 600
- Last updated
Registers (150)
150 read, 67 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| Software version number 0 | Read | ||||
| Appliance Type | Read | ||||
| Dipswitch value | Read | ||||
| Serial number 0 | Read | ||||
| Serial number 1 | Read | ||||
| Serial number 2 | Read | ||||
| HRA (Heat Recovery Appliance) Active Function | Read | ||||
| Fan control type | Read | ||||
| Ventilation mode | Read | ||||
| Hardware version | Read | ||||
| Software version number 2 | Read | ||||
| Temperature sensor exhaust fan | °C | Read | |||
| Software version number 1 | Read | ||||
| Current supply pressure | Pa | Read | |||
| Current exhaust pressure | Pa | Read | |||
| Fan Inlet Status | Read | ||||
| Setpoint supply air | m³/h | Read | |||
| Current value of supplyair | m³/h | Read | |||
| Speed supply fan | rpm | Read | |||
| Temperature sensorsupply fan | °C | Read | |||
| Fan inlet sensor rel.humidity | % | Read | |||
| Fan exhaust Status | Read | ||||
| Setpoint flow exhaust air | m³/h | Read | |||
| current value flowexhaust air | m³/h | Read | |||
| MassFlow exhaust,actual value | kg/h | Read | |||
| Speed exhaust fan | rpm | Read | |||
| Fan exhaust sensor rel.humidity | % | Read | |||
| Bypass status | Read | ||||
| Status preheater | Read | ||||
| Capacity of preheater | % | Read | |||
| Frost status | Read | ||||
| Frost heaterpower | % | Read | |||
| Flow switch position | Read | ||||
| NTC1 temperature | °C | Read | |||
| NTC2 temperature | °C | Read | |||
| RHT Sensor Humidity | % | Read | |||
| Signal output Status | Read | ||||
| Status filter | Read | ||||
| eBus power status | Read | ||||
| Current time | Read | ||||
| Current date | Read | ||||
| Operating time | Read | ||||
| Filters used in days | Read | ||||
| Filters used in m3/h | m³ | Read | |||
| Total flow in m3/h | m³ | Read | |||
| Geo heat exchangerStatus | Read | ||||
| CO2 sensor 1 status | Read | ||||
| Value CO2 sensor 1 | ppm | Read | |||
| CO2 sensor 2 status | Read | ||||
| Value CO2 sensor 2 | ppm | Read | |||
| CO2 sensor 3 status | Read | ||||
| Value CO2 sensor 3 | ppm | Read | |||
| CO2 sensor 4 status | Read | ||||
| Value CO2 sensor 4 | ppm | Read | |||
| Software version numberUIF Module(e.g. "S1.01.03.0001") | Read | ||||
| Software version numberUIF Module(e.g. "S1.01.03.0001") | Read | ||||
| Software version numberUIF Module(e.g. "S1.01.03.0001") | Read | ||||
| Hardware versionnumber UIF Module (e.g."H1.1") | Read | ||||
| Device Type | Read | ||||
| Dipswitch value | Read | ||||
| Language Data versionUIF Module (e.g."S1.01.03.0001") | Read | ||||
| Language Data versionUIF Module (e.g."S1.01.03.0001") | Read | ||||
| Language Data versionUIF Module (e.g."S1.01.03.0001") | Read | ||||
| Software version nr UIFModule (e.g."S1.01.03.0001") | Read | ||||
| Software version nr UIFModule (e.g."S1.01.03.0001") | Read | ||||
| Software version nr UIFModule (e.g."S1.01.03.0001") | Read | ||||
| Local UIF Switch | Read | ||||
| Local Button value | Read | ||||
| Software version nExtension ModuleUWA2-E (e.g."S1.01.03.0001") | Read | ||||
| Software version nExtension ModuleUWA2-E (e.g."S1.01.03.0001") | Read | ||||
| Software version nExtension ModuleUWA2-E (e.g."S1.01.03.0001") | Read | ||||
| Hardware version nrExtension ModuleUWA2-E (e.g. "H1.1") | Read | ||||
| Device Type | Read | ||||
| Temperature NTC Extension | °C | Read | |||
| Extension contact 1 | Read | ||||
| Extension contact 2 | Read | ||||
| Extension AnalogueInput 1 | V | Read | |||
| Extension AnalogueInput 2 | V | Read | |||
| Extension Relay output 1 | Read | ||||
| Dipswitch value | Read | ||||
| Extension Relay output 2 | Read | ||||
| Extension Analogue Output 1 | V | Read | |||
| Extension Analogue Output 2 | V | Read | |||
| Flow preset 0 | Read and write | ||||
| Flow preset 1 | Read and write | ||||
| Flow preset 2 | Read and write | ||||
| Flow preset 3 | Read and write | ||||
| Switch default position | Read and write | ||||
| Use display as switch | Read and write | ||||
| Imbalans allowed | Read and write | ||||
| Imbalance value | Read and write | ||||
| Offset imbalance supply | % | Read and write | |||
| Offset imbalance exhaust | % | Read and write | |||
| Bypass mode | Read and write | ||||
| Bypass temperature fromdwelling | °C | Read and write | |||
| Bypass temperature from outside | °C | Read and write | |||
| Bypass temperature hysteresis | °C | Read and write | |||
| Bypass boost | Read and write | ||||
| Bypass boost switch position | Read and write | ||||
| Frost control minimum inlet temperature | °C | Read and write | |||
| Days before filter warning | Read and write | ||||
| External heater mode | Read and write | ||||
| Postheater setpoint | °C | Read and write | |||
| RHT (humidity) sensor mode | Read and write | ||||
| RHT (humidity) sensor sensitivity | Read and write | ||||
| CO2 sensor mode | Read and write | ||||
| CO2 sensor 1 low level | ppm | Read and write | |||
| CO2 sensor 1 high level | ppm | Read and write | |||
| CO2 sensor 2 low level | ppm | Read and write | |||
| CO2 sensor 4 high level | ppm | Read and write | |||
| CO2 sensor 2 high level | ppm | Read and write | |||
| CO2 sensor 3 low level | ppm | Read and write | |||
| CO2 sensor 3 high level | ppm | Read and write | |||
| CO2 sensor 4 low level | ppm | Read and write | |||
| Signal output Setting | Read and write | ||||
| Switch type Input 1 | Read and write | ||||
| Digital Input 1 function | Read and write | ||||
| Digital input 1 supply fan function | Read and write | ||||
| Digital Input 1 exhaust fan function | Read and write | ||||
| Switch type Input 2 | Read and write | ||||
| Digital input 2 function | Read and write | ||||
| Digital input 2 supply fan function | Read and write | ||||
| Digital input 2 exhaust fan function | Read and write | ||||
| Analogue input 2 Mode | Read and write | ||||
| Analogue Input 1 Mode | Read and write | ||||
| Analogue input 1 Vmin | V | Read and write | |||
| Analogue input 1 Vmax | V | Read and write | |||
| Analogue input 2 Vmin | V | Read and write | |||
| Analogue input 2 Vmax | V | Read and write | |||
| Geo-heat exchanger | Read and write | ||||
| Minimum temperature geo-heat exchanger | °C | Read and write | |||
| Maximum temperaturegeo-heat exchanger | °C | Read and write | |||
| Default geo heatexchanger Valve Position | Read and write | ||||
| Geo heat exchangervalve output | Read and write | ||||
| Language | Read and write | ||||
| Date format | Read and write | ||||
| Time notation | Read and write | ||||
| Date Month Day | Read and write | ||||
| Date Year | Read and write | ||||
| Time | Read and write | ||||
| DateTime Rest | Read and write | ||||
| Modbus interface type | Read and write | ||||
| Modbus slave address | Read and write | ||||
| Modbus speed | Read and write | ||||
| Modbus control switched on | Read and write | ||||
| Request change in switch position | Read and write | ||||
| Desired flow rate setting | Read and write | ||||
| Request Standby | Read and write | ||||
| Reset filter warning | Read and write | ||||
| Appliance reset | Read and write |
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Use cases
- Monitor CO2 levels and airflow rates on a live dashboard to verify adequate ventilation in each zone.
- Create an alert when CO2 concentration exceeds the Max PPM threshold for more than 15 minutes.
- Remotely adjust Q Min and Q Max airflow setpoints to match seasonal occupancy patterns.
- Log supply and exhaust temperatures to verify heat recovery efficiency over time.
- Set up notifications when exhaust humidity rises above a defined limit, indicating potential moisture problems.
- Compare fan speed and pressure data across multiple Brink Flair units in a multi-dwelling project.
Installation
Connect the ModbusCloud Gateway to the Brink Flair unit via the RS-485 terminals on the UWA2-B or UWA2-E Modbus interface module.
Configure the Modbus RTU settings on the gateway to 19200 baud, even parity, and set the correct slave address matching the unit.
On the Brink Flair unit, ensure register 8000 is set to 2 to enable CO2-based flow control, and verify register 8002 is configured for flow control mode.
Set the position switch on the ventilation unit to position 1 so that CO2 regulation is active.
Import the Brink Flair template in the ModbusCloud portal and assign it to the connected gateway.
Verify live data appears on the dashboard by checking that airflow, temperature, and CO2 readings update correctly.
Things to watch for
CO2-based airflow control is not responding. What should I check?
Verify that register 8000 is set to 2 and the physical position switch on the unit is set to position 1. CO2 control does not operate when the switch is at position 0 or the fan symbol (absent mode).
What baud rate and parity settings does the Brink Flair require?
The Brink Flair uses 19200 baud with even parity (parity setting 1). Ensure these match exactly on your ModbusCloud gateway, as mismatched settings will prevent communication.
Can I read and write Q Min, Q Max, and PPM thresholds?
Yes. Registers 6001 (Q Min), 6003 (Q Max), 6151 (Min PPM), and 6152 (Max PPM) are all readable and writable. Changes take effect immediately on the unit.
Which Modbus interface module do I need on the Brink Flair?
You need the Brink UWA2-B or UWA2-E Modbus interface module installed on the ventilation unit. Refer to the corresponding Brink Modbus manual for wiring and addressing details.
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