HONEYWELL ENVIRACAIRE HWM910 Warm Moisture 2 Gallon Humidifier

I originally got this for my son when he would get coughs since no over the counter medicines helped very much. I doubted that it would help his coughs since I had no experiences with humidifiers, but it helped a lot while he slept. It has helped my daughter for coughs due to colds too. My daughter also has non-allergic rhinitis which is just like allergies, but the immune system is not involved so she doesn't actually produce histamines to cause her symptoms. This is good and bad because medicines do little or nothing to help with her congestion, runny nose, and coughing due to congestion at night. Apparently one cause of non-allergic rhinitis is lack of humidity which makes nasal passages swell up in some people. I used to think she had allergies or a perpetual cold, but her symptoms start around 7-8 at night and last till about 10-11 in the morning. She is fine for a few hours during the day. This humidifier is used for colds, and for my daughter's condition. My daughter can breathe and she hardly coughs anymore since she was diagnosed a few months ago. I like that there are no filters for this humidifier and it has kept working for so long with fairly easy maintenance. I soak the heating unit in the tray with a little vinegar water every 1-2 weeks to clean the heating unit and the tray at the same time. I used to only clean the tray this way, but I wanted to see if it would work for the heating unit and so far it has worked. I also rub off and rinse the hard water residue after I dump out the vinegar and water.I fill the water tank with water and put a small amount of bleach in as recommended in the instructions. The unit hasn't leaked since the gasket is strong and it the lid screws on tight. The tank is easy to fill and carry from the bathtub spout.Make sure the unit clicks into the base properly and you push the start button because it won't turn on otherwise. I have made the mistake of not having the unit clicked into the base the right way and a couple of hours later I found that it didn't turn on. This is a safety measure and I am glad to have it. I run it for about 8 hours a night on low. I hooked it up to a timer so it shuts off on it's own. I only wish it didn't get so hot hear in Southern CA so I could use it during the summer when it gets over 100 degrees F. I need to get a cool mist humidifier, but I dread the maintenance and/or filters.