--- title: "Brink Flair" description: "Brink Flair 325/400 heat recovery ventilation unit with Modbus RTU control via RS-485." url: "https://taphome.com/en/compatibility/brink-flair/" language: en lastmod: 2026-03-28 generator: hugo ai: topics: ["modbus-rtu","air-recovery","rs485","hrv","ventilation"] questions: ["How to integrate Brink Flair with TapHome?","What does the Brink Flair TapHome template control?","How to connect Brink Flair via RS-485 to TapHome?","How to enable Modbus communication on the Brink Flair?","How to control airflow on the Brink Flair via Modbus?","What is the default Modbus address of the Brink Flair?"] --- # Brink Flair Communication: Modbus RTU - [Brink Climate Systems](https://www.brinkclimatesystems.nl) ## Integration guide The Brink Flair is a heat recovery ventilation (HRV) unit that connects to TapHome via Modbus RTU over RS-485. The TapHome template supports the Flair 325 and Flair 400 models and operates in flow rate control mode, allowing direct airflow setpoint in m3/h. The template provides airflow control with standby mode, bypass valve management, fan speed monitoring with detailed diagnostics, supply and exhaust air temperature and humidity readings, filter status with reset capability, and up to four CO2 sensors. The Brink Flair uses the UWA2-B (standard) or UWA2-E (Plus version) PCB for Modbus communication. No additional adapter or module is required — the RS-485 interface is built into the unit. ## Hardware connection ### RS-485 connector The Modbus RS-485 connection uses a **red 3-pin connector**: - **Standard version (UWA2-B only):** Connect to connector **X15** on the UWA2-B PCB - **Plus version (UWA2-B + UWA2-E):** Connect to connector **X06** on the UWA2-E Plus PCB ![Brink Flair RS-485 Modbus connector pinout — Pin 1 GND, Pin 2 RS485-A, Pin 3 RS485-B](https://taphome.com/images/compatibility/brink-flair/wiring-rs485-pinout_hu_bb1d920c73357632.jpg) | Pin | Signal | |-----|--------| | 1 | RS485-ground | | 2 | RS485-A | | 3 | RS485-B | ### Connection variants ![Brink Flair Modbus connection variants — (A) standard UWA2-B via X15, (B) Plus version UWA2-E via X06](https://taphome.com/images/compatibility/brink-flair/wiring-modbus-connections_hu_aa0f2a1a46b50616.jpg) - **(A)** Standard Brink HRA with only the UWA2-B PCB — connect Modbus to **X15** - **(B)** Brink HRA Plus with UWA2-B and Plus PCB UWA2-E — connect Modbus to **X06** If Brink appliances are **cascaded** (up to 10 units via internal bus), the Modbus connection must be connected to the **Master appliance** with the Plus PCB UWA2-E. ### PCB layout and jumper settings ![Brink Flair UWA2-B PCB layout showing X15 Modbus connector, X12 terminator jumper, and X121/X122 jumpers](https://taphome.com/images/compatibility/brink-flair/pcb-uwa2-b_hu_791a78dd9a0064b5.jpg) **Jumper configuration for Modbus:** | Jumper | Action | |--------|--------| | **X12** | 120 ohm termination resistor — remove if TapHome Core already provides termination | | **X121, X122** | Must be **removed** for Modbus operation | | **X07** (Plus PCB only) | Must be **removed** when using Modbus on the UWA2-E Plus PCB | > [!WARNING] > When using Modbus, remove jumpers **X121** and **X122** from the UWA2-B PCB. When using internal Bus (cascading without Modbus), place jumpers X12, X121, and X122 back. ### Communication parameters | Parameter | Value | |-----------|-------| | Protocol | Modbus RTU (RS-485) | | Baud rate | 19200 | | Data bits | 8 | | Parity | Even | | Stop bits | 1 | | Default Slave ID | 20 (configurable 1-247) | Use **twisted pair cable** for the RS-485 connection (pins 2 and 3). ## Configuration ### Enabling Modbus communication Modbus communication must be activated on the Brink Flair touchscreen display: 1. Navigate to **Settings** > **14 Communication** 2. Set **14.1 Type of Bus connection** to **ModBus** (factory default) 3. Set **14.2 Slave address** to the desired address (default: **20**) 4. Set **14.3 Baudrate** to **19k2** (19200 baud) 5. Set **14.4 Parity** to **Even** > [!WARNING] > When Modbus is active, the ventilation setting **cannot be changed** through the display, multi-position switch, or connected humidity sensors. All control is exclusively via Modbus. ### Modbus control mode The TapHome template initializes the unit in **flow rate control mode** (register SH:8000 = 2). This allows direct airflow setpoint control in m3/h rather than preset switch positions. After a **power loss**, registers 8000-8011 reset and must be re-written. The template handles this automatically via its initialization script. ### MaxAirFlow import parameter When importing the template into TapHome, the **MaxAirFlow** parameter must match the unit model: | Model | MaxAirFlow | |-------|------------| | Flair 325 | 325 | | Flair 400 | 400 (default) | This parameter controls the airflow scaling — the dimmer maps 0-100% to 50-MaxAirFlow m3/h. ## Device capabilities ### Airflow control - **Airflow Control** — the primary control device, presented as a dimmer that maps 0-100% to 50-MaxAirFlow m3/h. Setting to 0% activates standby mode (fans off). Any non-zero value resumes normal operation and sets the desired airflow via register SH:8002 - **Supply Airflow** — current measured supply (inlet) air volume flow in m3/h - **Exhaust Airflow** — current measured exhaust (outlet) air volume flow in m3/h ### Bypass valve control - **Bypass** — controls the heat exchanger bypass valve with three documented modes: Automatic (0), Closed (1), and Open (2). The bypass valve allows fresh outside air to bypass the heat exchanger during summer when cooling is desired. A service attribute reports the physical bypass valve status (Initialize, Open, Close, Closed) ### Fan monitoring - **Supply Fan** — reads the supply fan speed as a percentage of maximum RPM. Includes six service attributes: fan status (Idle, Running, Not Found, Blocked, Fan Error), setpoint and current supply airflow (m3/h), mass flow (kg/h), fan RPM, and inlet anemometer speed (RPM) ### Temperature and humidity - **Supply Air Temperature & Humidity** — supply air temperature in °C (register A:4036, /10 conversion) and relative humidity (register A:4037) - **Exhaust Air Temperature & Humidity** — exhaust air temperature in °C (register A:4046, /10 conversion) and relative humidity (register A:4047) > [!WARNING] > **Humidity scaling inconsistency:** The template divides humidity registers (A:4037, A:4047) by /10 then /100 (total /1000). Official documentation states "tenths of percent, divide by 10" which would give 0-100%. The displayed humidity values may appear significantly lower than expected. This is a known issue in the template. ### Filter monitoring - **Filter** — reports filter status: clean (0) or dirty (1). Includes a warning when the filter replacement signal (H:6170) is active. Two service attributes show days and air volume since the last filter change. A service action resets the filter warning counter ### Imbalance control - **Imbalance Allowed** — enables or disables supply/exhaust airflow imbalance. When enabled, the supply airflow can be increased relative to exhaust by the percentage configured in the imbalance settings. Used for open fireplace compensation ### CO2 monitoring The module exposes four CO2 sensor readings (registers A:4201, A:4203, A:4205, A:4207) as service attributes, reporting concentration in ppm. The CO2 sensor mode (on/off) is also readable via service attribute H:6150. ### Module-level diagnostics The module provides extensive service attributes for monitoring: - **Current Mode** — active operating mode (Standby, Manual, Holiday, Night Ventilation, Party, Bypass Boost, Normal Boost, Auto CO2, Auto Modbus, and others) - **Modbus Control** — current control mode status (Switched OFF, Switch mode, Flow rate mode) - **Modbus Interface Type** — interface configuration (Brink, Brink Connect, External Customer) - **Preheater State** — preheater status (Initializing, Inactive, Active, Test mode) with output percentage - **NTC1 Temperature** — outside air temperature from the NTC1 sensor - **Airflow setpoints and measurements** — both supply and exhaust setpoint and measured values in m3/h - **Exhaust pressure** — current exhaust duct pressure in Pa (/10 conversion) - **Modbus Slave Address** — current slave address readback Module-level service actions include: setting the interface type to Brink Connect, enabling Modbus flow control, appliance reset, setting and ending standby mode, adjusting supply and exhaust imbalance offsets (-15% to +15%), and resetting the filter warning. ### Additional capabilities The Brink Flair also exposes registers for fan control type, ventilation mode (Holiday/Low/Normal/High/Auto), supply pressure, exhaust fan status and speed, mass flow exhaust, frost protection status with heater power and fan reduction, flow switch position, additional NTC and RHT sensors, bypass step position, flow presets, bypass temperature settings, frost control thresholds, filter warning interval, external heater configuration, humidity sensor settings, CO2 sensor thresholds, and operating time counters. These can be added in a future template update. ## Troubleshooting ### No Modbus communication 1. Verify the RS-485 cable connections: Pin 1 = GND, Pin 2 = A, Pin 3 = B 2. Check that jumpers **X121** and **X122** are removed from the UWA2-B PCB 3. Confirm Step 14.1 is set to "ModBus" on the touchscreen 4. Verify communication parameters in TapHome match the unit settings (19200 baud, Even parity, Slave ID 20) 5. If using the Plus PCB, check that jumper **X07** is removed and Modbus is connected to **X06** (not X15) ### Unit not entering Auto Modbus mode The module readscript checks register A:4020 and issues a warning if the mode is not "Auto Modbus" (12) or "Standby" (0). If the warning persists: 1. Verify register SH:8000 is set to 2 (flow rate mode) — the template initialization script handles this automatically 2. Check that no other control interface (display, multi-position switch) is overriding the Modbus setting 3. Power-cycle the unit and wait for the template to re-initialize ### Filter warning not clearing The device-level filter reset action writes 1 to register SH:8010, which is correct per official documentation. After triggering the reset, read back register 8010 — a value of 0xFF indicates the reset failed. Note that the filter status register (A:4100) may take a polling cycle to update. > [!NOTE] > There is an inconsistency in the template: the module-level filter reset action writes 0 to register SH:8010, while the device-level action and official documentation specify writing 1. Use the device-level "Reset Filter Warning" action on the Filter device for reliable operation. ### Humidity readings appear too low The template applies /10/100 scaling to humidity registers, which may produce values approximately 1000x lower than expected. If humidity shows near-zero values while the unit is operating normally, this is a known scaling issue in the template. Contact TapHome support for an updated template revision. ## Available devices 9 These devices appear in TapHome after import. Brink Flair Module Service Attributes | | | |--------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------| | Language | | | Current Mode | Active operating mode — Standby, Bootloader, Manual, Holiday, Night Ventilation, Party, Bypass Boost, Normal Boost, Auto CO2, Auto Modbus, and others | | Modbus Control | Modbus control mode — Switched OFF (Error), Switch mode (Error), Flow rate mode (Default) | | Modbus Interface Type | Modbus interface configuration — Brink, Brink Connect (Default), External Customer | | Preheater State | Internal preheater status — Initializing, Inactive, Active, Test mode | | Preheater Output | | | NTC1 Temperature | Outside air temperature from the NTC1 sensor | | Filter State | Filter cleanliness status — OK (not dirty) or Polluted (dirty) | | CO2 Sensor 1 Value | | | CO2 Sensor 2 Value | | | CO2 Sensor 3 Value | | | CO2 Sensor 4 Value | | | Imbalance Allowed | | | Imbalance Offset Supply | | | Bypass Mode | Current bypass valve setting — Auto, Closed, Open | | CO2 Sensor Mode | | | Modbus Slave Address | | | Current Exhaust Airflow | | | Current Supply Airflow | | | Setpoint Exhaust Airflow | | | Setpoint Supply Airflow | | | Current Exhaust Pressure | | | Exhaust Fan Temperature | | | Supply Fan Temperature | | Service Actions | | | |-------------------------------------|------------------------------------------------------------------------------------| | Set Interface Type to Brink Connect | | | Enable Modbus Flow Control | Activates flow rate control mode — required for direct airflow setpoint via Modbus | | Appliance Reset | | | Set Imbalance Offset Supply | | | Set Imbalance Offset Exhaust | | | Reset Filter Warning | | | Set Standby Mode | Puts the appliance into standby — fans off | | End Standby Mode | Resumes normal operation from standby | Initialize ```taphome MODBUSWNE(SH, 8000, Int16, 2); ``` Read (module) ```taphome MODBUSWNE(SH, 8000, Int16, 2); var mode := modbusr(A, 4020, uint16); # 0, "Standby", # 12, "Auto Modbus", if(! (mode = 12 or mode = 0), addwarning("Jednotka nie je v MODBUS rezime")); ``` Service Attributes Lanuguage ```taphome switch(MODBUSR(SH, 6900, UInt16), 1, "NL", "EN") ``` Aktualny rezim ```taphome switch(modbusr(A, 4020, uint16), 0, "Standby", 1, "Bootloader", 2, "Non Blocking Error", 3, "Blocking Error", 4, "Manual", 5, "Holiday", 6, "Night Ventilation", 7, "Party", 8, "Bypass Boost", 9, "Normal Boost", 10, "Auto CO2", 11, "Auto eBus", 12, "Auto Modbus", 13, "Auto LAN/WLAN Portal", 14, "Auto LAN/WLAN Local", "N/A") ``` Modbus Control ```taphome VAR Va:=MODBUSR(SH, 8000, Int16); IF Va = 0 RETURN ("Switched OFF [Error]"); ELSEIF Va = 1 RETURN ("Switch [Error]"); ELSEIF Va = 2 RETURN ("Flow rate [Default]"); ELSE RETURN ("Error"); END ``` Modbus Interface Type ```taphome VAR Va:=MODBUSR(SH, 7990, UInt16); IF Va = 0 RETURN ("Brink"); ELSEIF Va = 1 RETURN ("Brink connect [Default]"); ELSEIF Va = 2 RETURN ("External Customer"); ELSE RETURN ("Error!"); END ``` Stav predhrievača ```taphome switch(modbusr(A,4060,int16), 0, "Inicializácia", 1, "Neaktívny", 2, "Aktívny", 3, "Testovací režim", "Unknown"); ``` Výkon predhrievača \[%] ```taphome modbusr(A,4061,int16); ``` Teplota NTC1 \[C] ```taphome modbusr(A,4081,int16)/10 ``` Stav filtra ```taphome var state := modbusr(A,4100,int16); return(switch(todouble(state), 0, "ok", "polluted")) ``` Hodnota snímača CO2 1 \[ppm] ```taphome modbusr(A,4201,int16) ``` Hodnota snímača CO2 2 \[ppm] ```taphome modbusr(A,4203,int16) ``` Hodnota snímača CO2 3 \[ppm] ```taphome modbusr(A,4205,int16) ``` Hodnota snímača CO2 4 \[ppm] ```taphome modbusr(A,4207,int16) ``` Nerovnováha povolená \[0-on;1-off] ```taphome modbusr(H,6033,uint16) ``` Posun nerovnováhy pri prívode \[%] ```taphome modbusr(H,6035, int16) ``` Režim obtoku \[0 - auto; 1 - zatvoreny; 2 - otvoreny] ```taphome modbusr(H,6100,int16) ``` Režim snímača CO2 \[0 - VYP, 1 - ZAP] ```taphome modbusr(H, 6150,uint16) ``` Adresa Slave Modbus ```taphome modbusr(H,7991,int16) ``` (namerana hodnota) aktuálna hodnota prietoku výfukového vyduchu \[m3/h] ```taphome MODBUSR(A, 4042, UInt16) ``` (namerana hodnota) aktuálna hodnota privádzaného vzduchu \[m3/h] ```taphome MODBUSR(A, 4032, UInt16) ``` (pozadovana hodnota) bod nastavenia prietoku výfukový vzduch \[m3/h] ```taphome MODBUSR(A, 4041, UInt16) ``` (pozadovana hodnota) bod nastavenia privádzaného vzduchu \[m3/h] ```taphome MODBUSR(A, 4031, UInt16) ``` aktuálny tlak odsávania \[Pa] ```taphome MODBUSR(A, 4024, Int16)/10 ``` snímač teploty ventilátora odsávania \[C] ```taphome MODBUSR(A, 4046, Int16) / 10 ``` snímač teploty ventilátora prívodu \[C] ```taphome MODBUSR(A, 4036, uInt16) / 10 ``` Service Actions Set Interface Type to Brink Connect ```taphome MODBUSW(SH, 7990, UInt16, 1) ``` Aktivovať ovládanie výkonu cez Modbus ```taphome MODBUSW(SH, 8000, Int16, 2) ``` Appliance Reset ```taphome MODBUSW(SH, 8011, UInt16, 1) ``` Nastavenie posunu nerovnováhy pri prívode Parameters: Posun nerovnováhy pri prívode \[%] (-15–15 per) ```taphome if modbusr(sH,6036,int16) = per else modbusw(sH,6036,int16,per); end ``` Nastavenie posunu nerovnováhy pri odsávaní Parameters: Posun nerovnováhy pri odsávaní \[%] (-15–15 per) ```taphome if modbusr(sH,6036,int16,per) = per else modbusw(sH,6036,int16,per); end ``` Vynulovanie hlásenia filtra ```taphome modbusw(sh, 8010, int16,0) ``` Set Standby Mode ```taphome MODBUSW(SH, 8003, UInt16, 1) ``` End Standby Mode ```taphome MODBUSW(SH, 8003, UInt16, 2) ``` Bypass Multi-value Switch Read and write Heat exchanger bypass valve control — Automatic, Closed, Open Register: H:6100 Int16 numeric Values / States: Automaticky · Zavřeno · Otevřeno Read switch state ```taphome MODBUSR(H, 6100, Int16) ``` Write switch state ```taphome MODBUSW(H, 6100, Int16, Mu) ``` Service Attributes Status ```taphome switch(modbusr(A, 4050, uint16), 0, "Initialize", 1, "open", 2, "close", 3, "open", 4, "closed", "error" ) ``` Filter Reed Contact Read-only Filter cleanliness monitoring with days and air volume since last change, and filter warning reset Register: A:4100 UInt16 numeric Service Attributes | | |-------------------------------------| | Days Since Last Filter Change | | Air Volume Since Last Filter Change | Service Actions | | |----------------------| | Reset Filter Warning | Read ```taphome if (MODBUSR(H, 6170, UInt16) = 1, addwarning("Upozorneni na vymenu filtru")); MODBUSR(A, 4100, UInt16) ``` Read (module) ```taphome MODBUSR(A, 4100, UInt16) ``` Service Attributes Počet dnu od poslední vymeny ```taphome modbusr(A, 4115, Uint16) ``` Objem vzduchu od poslední vymeny \[m3/h] ```taphome modbusr(A, 4116, Uint32) ``` Service Actions Vynulovanie hlásenia filtra ```taphome modbusw(sh, 8010, int16,1) ``` Imbalance Allowed Switch Read and write Enables supply/exhaust airflow imbalance for open fireplace compensation Register: H:6033 UInt16 Values / States: ON · OFF Read switch state ```taphome MODBUSR(H, 6033, uint16); ``` Write switch state ```taphome MODBUSW(sH, 6033, uint16, switch(St, 1,1,0)); ``` Supply Airflow Variable Read-only Register: A:4032 UInt16 Unit: m3/h numeric Read ```taphome MODBUSR(A, 4032, UInt16) ``` Exhaust Airflow Variable Read-only Register: A:4042 UInt16 Unit: m3/h numeric Read ```taphome MODBUSR(A, 4042, UInt16) ``` Airflow Control Dimmer Read and write Primary ventilation control — maps 0-100% to 50-MaxAirFlow m3/h, 0% activates standby Register: SH:8002 Int16 Unit: m3/h numeric Read level ```taphome VAR Value := MODBUSR(SH, 8002, Int16); VAR Standby := MODBUSR(SH, 8003, Int16); # 0 - Off / 1 - On IF Value = 0 or Standby = 1 RETURN (0); ELSE RETURN (LINEAR(Value, 50, 1/(MaxAirFlow-50), MaxAirFlow, 1)); END ``` Write level ```taphome IF Le=0 MODBUSW(SH, 8003, Int16, 1); ELSE if (MODBUSR(SH, 8003, Int16) = 1, MODBUSW(SH, 8003, Int16, 2)); VAR Value := CEIL(LINEAR(Le,0,49,1,MaxAirFlow)); MODBUSW(SH, 8002, Int16, Value); END ``` Supply Fan Analog Input Read-only Supply fan speed as percentage of maximum RPM, with status, airflow, mass flow and anemometer diagnostics Register: A:4034 UInt16 Unit: RPM numeric Service Attributes | | | |------------------------|--------------------------------------------------------------------| | Status | Fan operating state — Idle, Running, Not Found, Blocked, Fan Error | | Setpoint Supply Air | | | Current Supply Air | | | MassFlow Inlet | | | Speed Supply Fan | | | Speed Inlet Anemometer | | Read input level ```taphome #switch(modbusr(A, 4030, uint16), #0, addinfo("Idle"), #1, addinfo("Running"), #2, adderror("Not Found - No Communication"), #3, adderror("Blocked"), #4, adderror("Fan Error"), "N/A"); LINEAR(MODBUSR(A, 4034, UInt16), 0, 0, maxRPM, 1) ``` Service Attributes Status ```taphome switch(modbusr(A, 4030, uint16), 0, "Idle", 1, "Running", 2, "Not Found - No Communication", 3, "Blocked", 4, "Fan Error", "N/A") ``` Setpoint supply air \[m3/h] ```taphome modbusr(A, 4031, Uint16) ``` Current value of supply air \[m3/h] ```taphome modbusr(A, 4032, Uint16) ``` MassFlow inlet, actual value \[kg/h] ```taphome modbusr(A, 4033, Uint16) ``` Speed supply fan \[RPM] ```taphome modbusr(A, 4034, Uint16) ``` Speed inlet anemometer \[RPM] ```taphome modbusr(A, 4035, Uint16) ``` Supply Air Temperature & Humidity Temperature Sensor Read-only Supply air temperature and relative humidity at the fan sensor Register: A:4036 Int16 Unit: °C / % numeric Read humidity ```taphome MODBUSR(A, 4037, UInt16) / 10 / 100 ``` Read temperature ```taphome MODBUSR(A, 4036, Int16) / 10 ``` Exhaust Air Temperature & Humidity Temperature Sensor Read-only Exhaust air temperature and relative humidity at the fan sensor Register: A:4046 Int16 Unit: °C / % numeric Read humidity ```taphome MODBUSR(A, 4047, Int16) / 10 / 100 ``` Read temperature ```taphome MODBUSR(A, 4046, Int16) / 10 ``` **Connection:** Modbus RTU • 19200 baud• 8E1 • Slave ID: $\[SlaveId] Possible improvements (24) - A:4021 Fan Control Type — 0=Initializing, 1=Constant flow, 2=Constant PWM, 3=Off, 4=Error, 5=MassBalance, 6=Standby - A:4022 Ventilation Mode — 0=Holiday, 1=Low, 2=Normal, 3=High, 4=Auto — current ventilation step - A:4023 Current Supply Pressure — Tenths of Pa; /10 to get Pa. Only exhaust pressure (A:4024) is in template as SA - A:4040 Fan Exhaust Status — Same enum as A:4030 (supply fan) — not exposed for exhaust fan - A:4043 MassFlow Exhaust — Exhaust air mass flow in kg/h — only inlet mass flow (A:4033) is in template as SA - A:4044 Speed Exhaust Fan — Exhaust fan RPM — only supply fan RPM (A:4034) is in template as device - A:4045 Speed Exhaust Anemometer — Exhaust anemometer RPM - A:4070 Frost Status — 16-state enum for frost protection state; important for cold climate operation - A:4071 Frost Heater Power — Frost heater output percentage (0–100%) - A:4072 Frost Fan Reduction — Fan speed reduction during frost protection (0–100%) - A:4080 Flow Switch Position — Physical 4-position switch: 0=Holiday, 1=Low, 2=Normal, 3=High - A:4082 NTC2 Temperature — Second NTC temperature sensor; tenths of °C, /10 - A:4083 RHT Sensor Humidity — Separate RHT humidity sensor; tenths of percent - A:4051 Bypass Step Position — Bypass valve position relative to zero point - H:6000–6003 Flow Presets 0–3 — Flow rate presets for 4-position switch (Flair 400: 50–400 m3/h). Currently controlled via SH:8002 flow rate mode instead - H:6101–6105 Bypass Temperature Settings — Bypass activation temperatures (from dwelling, from outside), hysteresis, bypass boost mode and fan setting - H:6110–6111 Frost Control Settings — Frost protection temperature threshold and minimum inlet temperature - H:6120 Filter Warning Days — Number of days before filter warning (1–365, default 90) - H:6130–6131 External Heater Settings — External heater mode (off/pre/post) and postheater temperature setpoint - H:6140–6141 Humidity Sensor Settings — RHT humidity sensor on/off and sensitivity (-2 to +2) - H:6151–6158 CO2 Sensor Thresholds — Low and high CO2 levels for sensors 1–4 (400–2000 ppm) - SH:8001 Switch Position Control — 0=Holiday, 1=Low, 2=Normal, 3=High — requires SH:8000=1 (switch mode). Template uses SH:8000=2 (flow rate mode) instead - A:4113–4114 Operating Time — Total operating time in hours (32-bit value) - A:4118–4119 Total Airflow Volume — Cumulative air volume since commissioning (32-bit, m3/h) ## Import parameters Enter these values when you import the XML. | Asked in the app | Default | |------------------|---------------| | Slave ID | `20` | | IP address | `192.168.1.0` | | Max Air Flow | `400` | ## Sources - Brink Modbus UWA2-B/UWA2-E Installation Regulations (614882-D) [www.brinkclimatesystems.nl](https://www.brinkclimatesystems.nl/documenten/modbus-uwa2-b-uwa2-e-installation-regulations-614882.pdf) 2026-03-28 [PDF](https://taphome.com/compatibility/devices/brink-flair/manufacturer/modbus-uwa2-b-uwa2-e-installation-regulations-614882.pdf) - Brink Flair 400 Installation Regulations (614895-L) [www.brinkclimatesystems.nl](https://www.brinkclimatesystems.nl/documenten/flair-400-installation-regulations-gb-614895.pdf) 2026-03-28 [PDF](https://taphome.com/compatibility/devices/brink-flair/manufacturer/flair-400-installation-regulations-gb-614895.pdf) - Brink Flair 325 Instalacny manual (SK) 2026-03-28 [PDF](https://taphome.com/compatibility/devices/brink-flair/manufacturer/flair-325-instalacny-manual-sk.pdf) - Home Assistant ESPHome Modbus Integration — Brink Flair 325/400 [community.home-assistant.io](https://community.home-assistant.io/t/brink-flair-325-heat-recovery-unit-esphome-modbus-integration-5/423182) 2026-03-28 Manufacturer documents are © their respective owners. They are provided as published by the manufacturer, for reference only. ## Related Documentation - [Modbus Integration](https://taphome.com/en/compatibility/modbus-guide/) - [Modbus](https://taphome.com/en/docs/integration/modbus/) - [Simple configuration using templates](https://taphome.com/en/docs/integration/modbus/templates/) - [Modbus scripts and prefetch](https://taphome.com/en/docs/script/modbus-scripts/) - [Modbus functions](https://taphome.com/en/docs/script/modbus/) - [Modbus data types](https://taphome.com/en/docs/script/modbus-data-types/)