My family has several table-top humidifiers (the cool-mist/nebulizer kind) in the house that we use a lot during the winter. Distilled water is recommended for using in humidifiers because the dissolved solids and other stuff in tap water can cause a residue to accumulate on walls and furniture, and also in the humidifier.
Unfortunately none of my options seem to be very efficient ongoing strategies for obtaining water for the humidifiers. Here are the downsides of them:
Purchasing distilled water from the store
- $0.78 per gallon
- need to recycle all the plastic jugs
- need to haul them all home from the store
Using water from my reverse osmosis system
- RO systems use 5+ gallons for every 1 gallon of filtered water they produce
- RO filters need replacing more often
Using a large water reservoir with an activated-carbon water filter (haven’t tried it myself yet)
- this would have the benefit of using tap water without wasting a bunch of it (like the RO system does), but I read that there’s a lot of stuff in water that doesn’t get removed by activated carbon.
Is there a better way than these methods? I use about 1 gallon of water per day in the humidifiers.