I have this data in the Renson integration now, I will ‘play’ with the returned data.
Hi @anon32076176 , does the company still provide API keys ? I requested mines 4 weeks ago to the email address above, but unfortunately got no reply 
They should, there’s only 1 person assigned to generating the keys so give it some time, especially with the holiday period just being passed.
This info is not available in the 3rd party public API but I assume it’s not hard to reverse engineer this 
, that being said, when the device is idle (IAQ is good), it consumes very little power and even when ventilation is high it should still be around 40W total or so, the fan is obviously the bulk of the consumption but there are also electronics which are not taken into account here, which accounts for around 5W, for more accurate measurement I advise to use a 3rd party measurement device such as INSPELNING plug, smart/energy monitor - IKEA Belgium
Already received and forwarded!
FYI I have a power meter on mine and it uses about 0,325kWh/day
Hi Ronan, hope you do well. i just sendend my Healthbox serial number, if you please be so kind to forward it internally ? i like to have the API key like Kalhimeo
Thanks in advance!
Okay done! 
Thank you so much!
It works like a charm.
Hi all: around september we will expand our API to our new heat recovery systems which are now available: https://www.renson.eu/gd-gb/producten-zoeken/ventilatie/mechanische-ventilatie/systeem-d/flux-wall
Hi, I have Flux+ Flat (the new product you mentioned) installed in my home. I would love to be able to talk to it via a local API. Since you said that the API will be developed in 2024, and now it’s 2026, there some hope for me, right?
Hi, the API is ready, there is a draft document for which we still need an official document to upload. I have forwarded your message to our customer service team who can give you the details. Due to the nature of the platform, the API will differ from Healthbox 3.0 so some programming for a plugin might be needed
Can you send this to me as well? I’m also buying the Renson Flux+ Wall 650 ERV and would like to know if I can integrate this before buying. I’m willing to extend the Renson integration to also include the Flux+ next to the delta line.
We are preparing an official document, feel free to relay your question to [email protected]
We are currently also looking to place a ventilation system in our house (4 bedrooms + bathroom)
Is the Healthbox 3.0 still supported in HA?
I can’t find it in HACS and see the repo last commit is 2 years old.
Kind regards,
Randy
Hi all,
Since the original Healthbox GitHub project is no longer actively maintained, I’ve created a cloned version to continue development.
I’m using a Healthbox 3 myself and have already implemented numerous bug fixes, improved error handling, and general stability updates. I’ll also be integrating the logo and adding new features over time. Contributions and feedback are welcome!
**
Be aware that you need to delete and remove the previous GIT from rmassch and all you settings will be gone.
**
Also this version is for now API only. Still need to check.
Regards
Hi, I also have the Flux Flat (Flux - Go Flat 370) in my new house. Is this API documentation released? Or is there another way I can obtain it and get credentials to my device?
Thanks!
It looks like the account has been deleted (otherwise you would still see the username and not 'anon[ymous]....'.
Hey all,
Wanted to share a Home Assistant integration I built for the Healthbox 3.0: GitHub - TrojanHorsePower/ha-healthbox3: Home Assistant integration for the Renson Healthbox 3 ventilation system · GitHub
Being upfront about it: I'm not a developer, and I built this with a lot of help from AI (Claude Code), based on the official local/third-party API documentation Renson sends when you request an API key, plus a lot of real device testing against my own unit to make sure things actually work as described rather than just look plausible. I know a few other integrations for this device already exist, so this isn't meant as "the" solution, just another option - from what I can tell it covers a bit more ground (full sensor set, boost as proper automatable entities, reauth handling, diagnostics) but everyone's needs differ, so take a look and see if it's useful to you.
What it does:
- Config flow through the UI, no YAML
- Optional API key support (you still need to email Renson support with your serial/warranty number, same as ever) which unlocks temperature/humidity/CO2/VOC/air quality sensors per room plus ventilation profile control
- Boost control as fan entities per room, plus a "boost all" - fully automatable
- Reauth flow if your key ever stops working, falls back gracefully instead of breaking
- Diagnostics support for easier troubleshooting
It's installable now via HACS as a custom repository, and I've submitted it to the official HACS default store too (PR is pending review, so that'll take a while).
Longer term I'd like to see this become a core Home Assistant integration. Since I'm not a developer myself, if anyone with real HA-core experience wants to get involved, I'm happy to add you as a collaborator on the repo - genuinely welcome PRs, issues, or anyone wanting to help push this further.
One more thing, curious if others see this too: individual per-room boost doesn't actually change airflow on my unit, even though the Renson app accepts it and the timer runs - only "boost all" and the app's identify function (which also targets one room) actually work. I've reported it to Renson directly since it looks like a software issue rather than hardware. Let me know if you've noticed the same.