I want to establish a best practice flow for Stosslueften (german which means ventilating more than one room by fully opening windows in multiple rooms and the connecting doors are open as well).
WHAT IS NEEDED?
smart thermostat which turns on/off the heating
some kind of sensors
(wind sensor in the hallway would be “best” but ugly and problematic with children)
contact sensors on the windows and connecting doors
a flow to rule them all
I HAVE NOT found the perfect solution just yet. So I’m looking for advice.
I have defined a variable “Stosslueften” YES/NO.
When all windows are closed it is set to NO:
If multiple windows are open it is set to YES: (here I struggle most since there are almost unlimted combinations of windows which can be opened. In a perfect world we open always the same windows but most of the time just some of the windows. This makes it complicated for me. We have 8 rooms with windows. The rooms have between 1 and 4 windows.)
And this is the logic which triggers all smart radiators to shut off or resume to Auto
EDIT: sorry I am an new user here and can only embed images. here is a link:
Thank you! Regarding that idea: I do have CO2 sensors, which are another variable or even a complete replacement except in the bathroom where a humidity sensor is preffered.
After all: I don’t need that sophisticated calculation. Since we are proper germans (kidding) we do stosslüften daily at set times. So no need for notification.
I just want a DETECTION of stosslüften to shut off all thermostats.
I use tado X and have their subscription which includes an open window detection. It is okay but not 100% working all the times. Thats why I am looking for an advanced flow for detection.
PS: buying additional sensors is not an issue if you guy recommend any.
Theoretically, yes.
However, there are very clear basic requirements for Zigbee and Z-Wave devices so that they work reliably and do not constantly lose connection.
Bluetooth devices, for example, naturally have a limited range. In addition, Homey Bluetooth’s range is not that great. Bluetooth devices will probably only work in the same room where the Homey Pro is located.
I just wanted to mention that.
Currently, I have four SONOFF SNZB-02D Zigbee LCD Smart Temperature Humidity Sensors in use and am quite happy with them. The display is easy to read and the response time is good. Regarding the battery life, I am unable to make any statements at this time.
IKEA has released new smart home products with the Matter standard, including a temperature and humidity sensor for just 7,99€, called TIMMERFLOTTE.
In my opinion, the interesting thing about this sensor is that it is powered by two AAA batteries. I assume that rechargeable batteries can also be used, as is the case with other devices.
However, I have no personal experience with this sensor.
Yes to your post. I am looking for a sensor for stosslüften. I do have temperature and humidity sensors in most rooms…
Maybe THIS is the lightbulb moment: Those temp and humidity can be the stosslueften sensors!
Flow which measures dropping temperature in multiple rooms. (Caveat this only works during cold days. which should suffice for switching off the thermostats since they are only on during cold days)
With the insight trends reloaded app you could determine a sudden temperature drop (in more than one room)
But IMHO this will trigger to late: by the time it triggers it is time to close the windows again?
Opening several windows means a lot of manual actions. So pushing one button (10 minutes before ?) to initiate ‘stosslüften’ seams very little effort to me.
