Climate
Duco
duco
Built inLocal pollingPlatinum
The Duco integration allows you to monitor and control Duco demand-controlled ventilation (DCV) systems from Home Assistant. Duco produces ventilation boxes for residential buildings that regulate air quality based on CO₂ and humidity sensors. This integration communicates locally with the Duco box over your home network, requiring no cloud connection.
In Apple Home through HomeKit Bridge
What HomeKit Bridge makes of each kind of entity this integration creates, read from its source code. A device only gets the ones that apply to it.
| Entity | Shows up as | Note |
|---|---|---|
switch | Switch or outlet | |
fan | Fan | |
binary_sensor | Sensor (motion, contact, leak, smoke…) | |
sensor | Sensor (CO₂, humidity, temperature) | |
select | Mode picker (as switches) |
What people report
Duco ventilation boxes and CO2/humidity modules work locally. UC and UCBAT nodes are ignored.
- Works8
- Won’t be supported2
| Device | In Home Assistant | In Apple Home | What they said | Source |
|---|---|---|---|---|
| Duco BSCO2 | Works Local | CO2 sensor module with air quality index supportedSaved copySupported devices: DUCO Connectivity Board 1.0: Supported; DUCO Connectivity Board 2.0: Supported; DucoBox Silent; DucoBox Focus; DucoBox Energy; BSCO2: CO₂ sensor module wired directly to the DucoBox PCB; provides CO₂ concentration and CO₂ air quality index.; UCCO2: Wall-mounted CO₂ sensor unit; provides CO₂ concentration and CO₂ air quality index.; UCRH: Wireless humidity sensor module; provides relative humidity and humidity air quality index.; UC: Universal control unit (no sensor data exposed); UCBAT: Battery-powered sensor module. Limitations: UC: Universal control unit (no sensor data … Excerpt saved from home-assistant.io on 2026-10-23. | Docs | |
| DUCO Connectivity Board 1.0 | Works Local | Wi-Fi board setup bug fixed after reportSaved copy… 433, in _async_refresh self.data = await self._async_update_data() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/src/homeassistant/homeassistant/components/duco/coordinator.py", line 70, in _async_update_data nodes = await self.client.async_get_nodes() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.14/site-packages/duco/client.py", line 296, in async_get_nodes return [self._parse_node(node_data) for node_data in data["Nodes"]] ~~~~~~~~~~~~~~~~^^^^^^^^^^^ File "/usr/local/lib/python3.14/site-packages/duco/client.py", line 321, in _parse_node … Excerpt saved from GitHub on 2026-10-23. | Issue #169985 · 2026-05 | |
| DUCO Connectivity Board 2.0 | Works Local | Listed as supportedSaved copySupported devices: DUCO Connectivity Board 1.0: Supported; DUCO Connectivity Board 2.0: Supported; DucoBox Silent; DucoBox Focus; DucoBox Energy; BSCO2: CO₂ sensor module wired directly to the DucoBox PCB; provides CO₂ concentration and CO₂ air quality index.; UCCO2: Wall-mounted CO₂ sensor unit; provides CO₂ concentration and CO₂ air quality index.; UCRH: Wireless humidity sensor module; provides relative humidity and humidity air quality index.; UC: Universal control unit (no sensor data exposed); UCBAT: Battery-powered sensor module. Limitations: UC: Universal control unit (no sensor data … Excerpt saved from home-assistant.io on 2026-10-23. | Docs | |
| Duco DucoBox Energy | Works Local | Ventilation unit supportedSaved copySupported devices: DUCO Connectivity Board 1.0: Supported; DUCO Connectivity Board 2.0: Supported; DucoBox Silent; DucoBox Focus; DucoBox Energy; BSCO2: CO₂ sensor module wired directly to the DucoBox PCB; provides CO₂ concentration and CO₂ air quality index.; UCCO2: Wall-mounted CO₂ sensor unit; provides CO₂ concentration and CO₂ air quality index.; UCRH: Wireless humidity sensor module; provides relative humidity and humidity air quality index.; UC: Universal control unit (no sensor data exposed); UCBAT: Battery-powered sensor module. Limitations: UC: Universal control unit (no sensor data … Excerpt saved from home-assistant.io on 2026-10-23. | Docs | |
| Duco DucoBox Focus | Works Local | Ventilation unit supportedSaved copySupported devices: DUCO Connectivity Board 1.0: Supported; DUCO Connectivity Board 2.0: Supported; DucoBox Silent; DucoBox Focus; DucoBox Energy; BSCO2: CO₂ sensor module wired directly to the DucoBox PCB; provides CO₂ concentration and CO₂ air quality index.; UCCO2: Wall-mounted CO₂ sensor unit; provides CO₂ concentration and CO₂ air quality index.; UCRH: Wireless humidity sensor module; provides relative humidity and humidity air quality index.; UC: Universal control unit (no sensor data exposed); UCBAT: Battery-powered sensor module. Limitations: UC: Universal control unit (no sensor data … Excerpt saved from home-assistant.io on 2026-10-23. | Docs | |
| Duco DucoBox Silent | Works Local | Ventilation unit supportedSaved copySupported devices: DUCO Connectivity Board 1.0: Supported; DUCO Connectivity Board 2.0: Supported; DucoBox Silent; DucoBox Focus; DucoBox Energy; BSCO2: CO₂ sensor module wired directly to the DucoBox PCB; provides CO₂ concentration and CO₂ air quality index.; UCCO2: Wall-mounted CO₂ sensor unit; provides CO₂ concentration and CO₂ air quality index.; UCRH: Wireless humidity sensor module; provides relative humidity and humidity air quality index.; UC: Universal control unit (no sensor data exposed); UCBAT: Battery-powered sensor module. Limitations: UC: Universal control unit (no sensor data … Excerpt saved from home-assistant.io on 2026-10-23. | Docs | |
| Duco UCCO2 | Works Local | Wall-mounted CO2 sensor with air quality index supportedSaved copySupported devices: DUCO Connectivity Board 1.0: Supported; DUCO Connectivity Board 2.0: Supported; DucoBox Silent; DucoBox Focus; DucoBox Energy; BSCO2: CO₂ sensor module wired directly to the DucoBox PCB; provides CO₂ concentration and CO₂ air quality index.; UCCO2: Wall-mounted CO₂ sensor unit; provides CO₂ concentration and CO₂ air quality index.; UCRH: Wireless humidity sensor module; provides relative humidity and humidity air quality index.; UC: Universal control unit (no sensor data exposed); UCBAT: Battery-powered sensor module. Limitations: UC: Universal control unit (no sensor data … Excerpt saved from home-assistant.io on 2026-10-23. | Docs | |
| Duco UCRH | Works Local | Wireless humidity sensor with air quality index supportedSaved copySupported devices: DUCO Connectivity Board 1.0: Supported; DUCO Connectivity Board 2.0: Supported; DucoBox Silent; DucoBox Focus; DucoBox Energy; BSCO2: CO₂ sensor module wired directly to the DucoBox PCB; provides CO₂ concentration and CO₂ air quality index.; UCCO2: Wall-mounted CO₂ sensor unit; provides CO₂ concentration and CO₂ air quality index.; UCRH: Wireless humidity sensor module; provides relative humidity and humidity air quality index.; UC: Universal control unit (no sensor data exposed); UCBAT: Battery-powered sensor module. Limitations: UC: Universal control unit (no sensor data … Excerpt saved from home-assistant.io on 2026-10-23. | Docs | |
| Duco UC | Won’t be supported Local | Discovered but no entities exposed yetSaved copySupported devices: DUCO Connectivity Board 1.0: Supported; DUCO Connectivity Board 2.0: Supported; DucoBox Silent; DucoBox Focus; DucoBox Energy; BSCO2: CO₂ sensor module wired directly to the DucoBox PCB; provides CO₂ concentration and CO₂ air quality index.; UCCO2: Wall-mounted CO₂ sensor unit; provides CO₂ concentration and CO₂ air quality index.; UCRH: Wireless humidity sensor module; provides relative humidity and humidity air quality index.; UC: Universal control unit (no sensor data exposed); UCBAT: Battery-powered sensor module. Limitations: UC: Universal control unit (no sensor data … Excerpt saved from home-assistant.io on 2026-10-23. | Docs | |
| Duco UCBAT | Won’t be supported Local | Discovered but no entities exposed yetSaved copySupported devices: DUCO Connectivity Board 1.0: Supported; DUCO Connectivity Board 2.0: Supported; DucoBox Silent; DucoBox Focus; DucoBox Energy; BSCO2: CO₂ sensor module wired directly to the DucoBox PCB; provides CO₂ concentration and CO₂ air quality index.; UCCO2: Wall-mounted CO₂ sensor unit; provides CO₂ concentration and CO₂ air quality index.; UCRH: Wireless humidity sensor module; provides relative humidity and humidity air quality index.; UC: Universal control unit (no sensor data exposed); UCBAT: Battery-powered sensor module. Limitations: UC: Universal control unit (no sensor data … Excerpt saved from home-assistant.io on 2026-10-23. | Docs |
Gathered from GitHub issues, pull requests, discussions and docs, and from r/homeassistant. These are individual reports, so check the linked thread and the date before you buy.
How it connects
Local polling
Talks to the device on your network, asking it for updates every so often.
Found automatically over
- DHCP
- Bonjour (zeroconf)
Details
| Installs (analytics) | 130 (0.02%) |
|---|---|
| Quality scale | Platinum |
| Added in | Home Assistant 2026.5 |
| Set up in the UI | Yes |
| Maintainers | @ronaldvdmeer |
Devices listed in its documentation
- DUCO Connectivity Board 1.0: Supported
- DUCO Connectivity Board 2.0: Supported
- DucoBox Silent
- DucoBox Focus
- DucoBox Energy
- BSCO2: CO₂ sensor module wired directly to the DucoBox PCB; provides CO₂ concentration and CO₂ air quality index.
- UCCO2: Wall-mounted CO₂ sensor unit; provides CO₂ concentration and CO₂ air quality index.
- UCRH: Wireless humidity sensor module; provides relative humidity and humidity air quality index.
- UC: Universal control unit (no sensor data exposed)
- UCBAT: Battery-powered sensor module
Limitations from the docs
- UC: Universal control unit (no sensor data exposed)
- UCBAT: Battery-powered sensor module
In ReReHome
Whatever HomeKit Bridge shares reaches Apple Home as normal HomeKit accessories behind your Home Assistant bridge, so ReReHome shows and controls them like any other.
Bridges get their own settings page listing the accessories behind them.
