(08-12-2018, 06:13 PM)Melman Wrote: As a microbiologist, I would not state that it is impossible to acquire an infection from CPAP but the probability is much lower than from other potential sources to which we are routinely exposed.  As has been mentioned, Mycobacterium avium-intracellulare organisms are widespread in fresh water, soil, house dust and even food products (Have you ever seen a soil free potato?). The disease can be acquired by inhalation or ingestion. Sleeprider is correct in saying we are much more likely to inhale the organisms from the shower than CPAP. Although I believe he is incorrect in stating that no aerosol is generated from our humidifiers, it is much less than we are likely to inhale in almost any other activity involving water such as simply running water in a sink, filling a glass for a drink, washing our hands, etc.  It’s virtually impossible to disturb the surface of water without generating an aerosol. We also routinely inhale airborne dust which is known to carry the organisms. So those who are not using CPAP are as likely to have significant exposure to these organisms those who are. Unfortunately, short of living in a sterile isolator with filtered air and sterilized food and water, it is probably impossible for susceptible individuals to avoid exposure.

It is true that steam distilled water should be sterile but only if everything it contacts downstream of the point of distillation is sterile. In the case of inexpensive distilled water purchased at supermarkets and other vendors, it is unlikely that the condensers,  piping, storage tanks, bottling equipment, or the plastic bottles into which the water is dispensed are sterilized or that the operation is conducted in a sterile environment. The cost would be too great to allow a price of $1 or less per gallon. Such distilled water, therefore, will contain a variety of environmental organisms. As I have pointed out in the past, the only commercially available sterile water is sterile water for injection or irrigation which costs $20-25 per liter.

Even if one were to go to the expense of using such water, how would sterility of the humidifier chamber be assured? Simply washing and rinsing it with tap water is likely to result in the presence of environmental organism that may be a threat to immunocompromised individuals.
The only advantage to using distilled water is to avoid mineral deposits. Even if it were to eliminate exposure to potential pathogens it would be ineffectual given the exposure from so many other environmental sources.

(02-02-2022, 09:47 AM)Crimson Nape Wrote: High minerals in your water would just mean that you will need to clean your water tank more often.  Using Vinegar will help remove the scale.  Water vapor will not carry mineral contaminants.  You will only have a scale buildup in the water tank.    The buildup is because of the water's evaporation.   I guess refrigeration would extend the water.  How long has the jugs of water sold in the stores been sitting around?

(02-02-2022, 09:34 AM)Kafka82 Wrote:  - maybe Zero Water filtered is just ok?