Distilled water for CPAP machine

It is distilled water, so is fine.

It generally not recommended to drink distilled or deionized water since it lacks beneficial minerals and salts your body needs. However, that is as your primary source of water, breathing a few ounces as vapor (and breathing most of it out) presents no issues.

If in a pinch, most CPAP manufacturers do say that you can just use filtered drinking water for something like the length of a trip, using distilled water lessens mineral deposits you might see over prolonged use no harm comes to the machine using filtered water over a couple weeks.

If you have a kettle in your room just boil the water and let it cool off. In a pinch it works

Tap water works fine in a CPAP humidifier chamber, but make sure you rinse the water chamber out thoroughly each morning and fill it again with fresh water. You don't want the dissolved solids to build up in the chamber. Tap water is perfectly safe and potable everywhere in the EU. Boiling it is unnecessary, and in fact serves to further concentrate the dissolved solids, so not recommended.

I've used my own CPAP without any humidification all summer (4 months so far) and lived to tell the tale, so running dry is another option.

@Barbara - No kettle, hence my search for the purest water I can find.

@Paul - what you say makes sense. It says "nicht als Trinkwasser geeignet" which I believe translates to "not suitable for drinking water". I asked someone at a pharmacy a few minutes ago and from what I understood, she said something similar... i.e.: it's not meant for drinking because of the lack of minerals, but to breathe some is alright. I'm hoping this is correct.

@jphbucks - I have run it dry before and it works in a pinch but it is not ideal for me.

I'll probably continue to use the DM distilled water unless I hear of a good reason not to.

If you can get distilled water, in whatever language, at a reasonable price, then that is what you should use. Distilled water isn't the recommended way to drink water, no matter where you are, for the reasons given. If you can't get distilled water, you can either use filtered water or tap water if it is potable, for short periods . You can also go without using water at all for short periods.

Do NOT use boiled tap water. As noted, while this will kill any pathogens, it will also significantly increase the mineral concentration of the water. Just boiling is not the same as distilling.

I’m a former chemistry teacher and just chiming in to agree with jphbucks and Cjean that boiling water will concentrate the dissolved solids, and not remove them.

I sometimes use regular bottled water in my CPAP when traveling. It's not a big deal, you'll just get mineral build up in the reservoir over time. I've used tap water in a pinch. Distilled is the best

unless I hear of a good reason not to

Sometimes there are additives; check the bottle label. If you travel to France, the bottle water Mont Roucous has the least amount of minerals.

I also use a CPAP machine now and most of the time I'm able to get distilled water. However I would use reverse osmosis bottled water if that's all that was available. I believe Dasani and Aquafina both use the RO process. There may be others but I'd have to do some further research.

Distilled watet is available in the laundry section of many stores. We just paid 1 E for 5 liters in a small store n Bordeaux. If you can't find it there,check a pharmacy but expect to pay coonsiderably more

Dasani and Aquafina have minerals added back in for taste, which makes the RO treatment irrelevant if you're trying to avoid the mineral buildup.

Whatever water you use, it's just for humidity to make it comfortable to breathe, not therapeutic value. The air itself is not sterile either, if you're assuming thats why distilled water is recommended.