I had mold in the basement and wanted to know how high the load by ist.Evtl. also into the stairwell and possibly in the apartment pulls into. So, at first so set a part as instructed in the basement and then exciting waiting on results. Result, the mold on the wall must be color well! ;-) I had after the specified waiting period only a little mushroom on the test box, even after 5 days no more !!!! According to the table it will probably only from 6 mushrooms are dangerous as far as I remember correctly. However, the electronic instrument from renovators discovered then significantly high values and felt then also increased in the stairwell on. Totally unreliable and not recommended.