Post
by kopoloff » Mon Oct 05, 2009 4:25 am
This continuing debate about cleaning humidifiers, and the use of distilled use, has got me intrigued. I have estimated that, conservatively, there have been 17,268,147 posts about this subject, and still the debate rages.
My views about distilled water usage have been made many times, so I’m not going to enter into further debate, however I thought I’d tell you a little about my recent experiment.
Melbourne tapwater is almost as good as Johnny Walker Black label. It has low turbidity, relatively low dissolved solids and most people in Melbourne drink it straight from the tap. I’ve been using tap water in the humidifier for a year now. Each morning I tip the remaining water on the tomato plants, give the tank a quick rinse and leave it to air dry. Weekly I flush it with a 10% vinegar solution.
After the year of this regime, the tank is as clear, bright and shiny as the day it was born.
Two weeks ago I changed the regime. Each morning, rather than flushing and rinsing, I just topped it up. Generally, I use about 60% of the water in the tank, so after the first week the concentration of the solids and scum etc would have increased by a factor of about 4.6. At the end of the week, I tipped out the residue water and let the tank air dry. There was on the tank walls a slight brown scum. I’m not sure about other machines, but the Resmed H4i humidifier affords very easy access for cleaning, so I was able to get in there with a tissue and clean it off very successfully. The tissue was stained, but not badly.
Now, for all of last week I went back to my normal regime (drain and flush each morning). And this weekend I let it air dry and used the tissue to attempt to clean off any residue. The tissue was clean, no evidence of any staining.
So, what’s my conclusion? I’m not prepared to give one, except that it reinforces my opinion that there is nothing wrong with using reasonably good quality tapwater as long as it is replaced (not topped up) each day. And it proves my point that even if there is ‘stuff’ in tapwater, the distillation process removes it from the airstream going up the hose.
Cheers
K