(06-27-2021, 04:51 PM)qwerty42 Wrote:

Mr. Slobber, is this device compatible with the portable air compressor out in my garage? I have a 30ft hose I'd like to run in through my window and then I don't need any extra sound abatement materials. 120psi should be enough to keep the hypopneas at bay.

Quote:It's that little hedge that is telling: "probably...absolutely".

(06-28-2021, 12:19 AM)cathyf Wrote: Hubs wants to know if he can use a dustbuster to make a DreamSuck Mini ???

(06-28-2021, 12:19 AM)cathyf Wrote: Hubs wants to know if he can use a dustbuster to make a DreamSuck Mini ???

(06-28-2021, 12:30 AM)Ratchick Wrote: It's not about hedging. It's because there's always some variability in populations depending on use. But there is no arguing that ozone damages materials (and yes, that means some hard plastics as well as foams). This is why when things are sterilised in a lab with ozone, the material is of vital importance. Also, the concentration of ozone used, the frequency, the exposure for each part, the variation in flow through the system, any leaks etc. Also, the breakdown of ozone is affected by many other factors, including humidity, temperature, ultraviolet, biological agents, etc. Does someone use an ozone cleaner once in a blue moon or every day? Do they only treat the masks, tubes etc or the machine too? How long for? How do they air it out? Do they properly ventilate the room after using it? Do they run the machine for a while to ensure that clean, non-contaminated air is thoroughly pushed through all of the nooks and crannies? These things all make a difference.

Does ozone damage the foam used in CPAPs? Yes, along with other plastics. This is non-negotiable. If you set up a controlled test and expose some polyurethane foam to ozone and some to normal air, the foam exposed to the ozone will deteriorate faster.  

Will that absolutely cause harm to a person or the machine, depending on their usage? No, because in practice, biology and medicine is fuzzy and based around populations, not individuals, and there are always statistical outliers. That's just how the world works. That kind of thinking is the same as people who say "well if cigarettes cause cancer, how come my grandpappy smoked until he was 102 and was fine?" or "My mom never smoked a day in her life and SHE still died of cancer, so it must be wrong that cigarettes cause cancer." That's just not how it works.

I'm not sure what made you think that ozone "breaks down in minutes". The half-life of ozone depends on a lot of factors, but at 20 C, the half-life of ozone in air is 3 days and when completely dissolved in water at 20 C, it's 20 minutes. That means, it takes three days for half of the ozone to break down in 20 C air. Not only that, but ozone causes damage to respiratory tissues at 0.1 part per million. It takes up to 5 PPM to be effectively bacteriocidal. That's five hundred times higher than causes harm.

Now yes, sure - opening the windows and turning on ventilation may well blow most of the ozone out of the room (rather than it being broken down) but the fact is that studies have shown that ozone often persists in rooms after being left for a "safe" time, according to the manufacturer's instructions and in something like a CPAP device, with dark, closed-off nooks and crannies with no airflow through most of them, ozone can absolutely still be present when you go to use it in levels high enough to cause harm. Yes, blowing it through might be okay (but then, the ozone is in the room air, potentially in levels high enough to cause harm, depending on how much was lingering inside the machine). And using it once might be okay. Using it a handful of times might be okay too. But using it every night? That's when the likelihood of problems starts to build up.