Now the TÜV already has issued the second approval certificate on the DELPHIN appliance.

In the report on the examinations carried out by the TÜV it is confirmed that even when the water is heavily polluted, neither mould fungi and germs nor bacteria can get out of the water basin of the DELPHIN into the air in the room. The water bath was enriched with about 60 millions of germs and it was ascertained that despite the extreme water pollution of 60 millions of germs, no germs got out of the water basin into the outgoing air. In addition, about 55 % of the germs sucked in out of the air in the room were washed out with the help of the DELPHIN.

The permissible number of germs and bacteria is represented in the table:

Medium	Degree of pollution	After 30 minutes contained in the air in the room when appliance is running on max. power
Drinking water	Permissible 100 CFU/ml
Air washer	Permissible 1.000 CFU/m3
Air in the room was polluted by 113/ m3 of germs	113 CFU/m3
Water in the DELPHIN was filled up with 200 ml of 3x105 CFU/ml each.	60.000.000 CFU in water bath	It has been proved that only 63 CFU/ m3 remained in the outgoing air of the DELPHIN. This shows that the outgoing air of the DELPHIN is much cleaner (- 55 %) than the air sucked in from the room, even if the water is extremely polluted.

The same experiment was also carried out with 260 millions of mould spores Aspergillus in the water basin:

Medium	Degree of pollution	Total of mould fungi Average CFU/m3
Air in the room was measured three times before vacuuming.	20 CFU/m3 35 CFU /m3 15 CFU /m3	15- 35CFU/m3
Outgoing air - DELPHIN	15 CFU/m3 10 CFU /m3 0 CFU /m3	0 - 15CFU/m3
Water in the DELPHIN was filled up with 200 ml of 1,3x106 CFU/ml each.	260.000.000 CFU in water basin	It has been proved that only 0-15 CFU / m3 remained in the outgoing air of the DELPHIN. This shows that the outgoing air of the DELPHIN can actually be low in germs, even if the water is extremely polluted.

* CFU = colony forming unit