This card carries a room thermometer and additional an indicator for humidity.
So this could be your personal „comfort test“ for home.
Indicating the room temperature and the humidity may also provide you for possible mold in your home which might be reason of bad isolation of walls and windows or incorrect aeration.
Many owners of real-estates use these comfort cards to give hints to their clients for correct aeration to prevend possible damages by mold.
Comfort card comes in 2 versions: in credit card size or as wallhanger
