Folks that live where it is dry and hot sometimes use swamp coolers ( Evaporative coolers) instead of air conditioners. Since those areas don’t have humidity the swamp cooler add cool moisture to the air and makes it feel cooler. They can get a bit stinky due to bacteria and fungi buildup in them so you need to clean them. Otherwise if they have been turned off for a while when you turned it on you can get a rather swampy odor from your swamp cooler. Mothers Niche shares how to clean your swamp cooler and then use essential oils to make it smell fresh. I wish I had known this when I lived in Az. We used a swamp cooler and it did have its swampy smelling days.
mothersniche.com
