I will be entering my fourth season using the same Air 0 Swiss 7135 humidifier. This immediately tells you something about its reliability and my satisfaction with the product.
1. Room Coverage
2. Level of Quietness
3. Filter Life & Cost of Replacement Cartridges
4. Amount of Maintenance Required
5. Anti-bacterial Features
6. Ease of Filling
7. Ease of Operation and Filter Replacement
8. Quality of Construction
9. Humidistat to select desired humidity level & hygrometer to display the actual humidity in the room
10. Frequency of Filling
11. Value for Price
It is almost noiseless, and therefore is a humidifier that my husband can live with in our bedroom. It is strategically placed so as to reduce his snoring and my tendency to sinus infections.
It humidifies a good sized master bedroom quite quickly, so we do not need to keep it running 24/7, although we sometimes do in the dead of winter.
It is light enough to make filling it up a relatively easy process even if you have little upper arm strength. It is not a top fill which would be my first choice, but refilling is not onerous and it lasts at least 24 hours.
It offers the option of cool and warm mist. Since we live in the Northeast I choose the warm mist option as it results in a humidity which is pleasantly warm rather than cool.
Even though I use it on warm mist, because of the demineralization cartridge I do not have any white dust around my bedroom. I might add that we do not have hard water and for those with very hard water you might have to change the cartridge more often. The Air-O-Swiss air washer might also be a better choice.
I also can rest easy that this humidifier is not spewing out bacteria into the air because the water is sterilized using a patented ionic stick. We are so impressed with the ionic stick, we recommend it as an accessory for other humidifiers.
Costs a little more than the average humidifier but worth the money
Need to replace demineralization cartridge but only once per season
So all in all I think this humidifier gets the job done and I have no complaints and would recommend it to others without hesitation. It is not without note to reveal that we have the highest customer satisfaction with this brand as evidenced by the lowest level of returns. Our customers like this humidifier and we agree with them.