Works, but is unremarkable, in case of alarm unmistakable. BUT ...

... When installing the heat detector has struck me that the description or the Installation Advisor, respectively is inaccurate to indifferent. A Hitzmelder must be installed differently than, for example, a smoke detector or it does not work if it is to it.
Furthermore, the indication that the heat detector could also be used outdoors allegedly, a smooth misinformation. A heat detector can only be its tasks, if it is installed in a place where there is also heat to build up in a fire / fire. A place where the heat can escape from the fire / fire emanating heat (outdoor) is not suitable! Especially as the appropriate IP protection classification is missing! Therefore, only suitable for indoor use. For outdoor use, there are special (mainly for industry) sensors that can detect heat (eg via infrared -. Therefore also much more expensive).
However, this heat detector reacts to temperatures above about 60 ° C and temperature differences (temperature may rise). For this reason, areas / places with artificial ventilation for this type of heat detectors are unsuitable. Even campers are not appropriate because they can heat up significantly in the sun (like other vehicles).

Anyway - I recommend (as one or the other Vorrezensient) necessarily expert advice (eg fire brigade.) Catch up. Then his own or the lives of others depend on that as a detector works when you need it!