06-09-2014, 09:35 AM
(This post was last modified: 06-09-2014, 09:36 AM by Visitor.)
I should have checked a bit more. There is an extensive discussion of it on another forum.
One of the posters observes:
Filling my humidifier tank with distilled water and setting the pressure at 4 cm H2O (flow rate of around 20 liters per minute) revealed that my system was basically free of contamination. I then added a little salt to some water and put that water into the humidifier tank. When I measured the condensate water from the machine at a pressure of 4 cm H2O, there was basically no contamination, however, when I increased the pressure to 10 cm H2O (with a flow rate of around 33 liters per minute), salt contamination was observed in the collected condensate.
This suggests that at higher flow rates there may be some turbulence causing some of the water to form an aerosol. While water vapor doesn’t support a transfer of contamination, an aerosol can.
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