This is the first humidifier I have owned. I like the 75i very much and it runs very quietly. Filter light is still on the first dot so either my home doesn’t have much to filter or it’s not working. I’m sure it does work well. I bought this as my husband recently had an accident breaking ribs and harming one lung. Trying to do everything I can to help keep him from getting pneumonia. I purchased one for our bedroom also. That one is also very quiet. Linda
We got the 75i for our great room and the 45i for the bedroom. We've been very happy with both of them. We did upgrade the filters. I found that when I'm cooking something that puts an odor in the air, sometimes it doesn't detect it fast enough so I go ahead and switch it from auto to turbo and then it makes a big difference.
Very pleased with this unit's ability to gauge the air quality and adjust accordingly when set on auto. It is quite large, but attractive and slim line. Especially since you can customize the front. On mid speeds, noise level is still good and not disruptive. Roller wheels allow for ease in movement.
It looks good, is much quieter than I expected and I love the Auto setting, so it only works harder when the air quality is not as good. Thinking of buying more.