The ideal indoor humidity level for health and comfort is somewhere between 30-50% humidity, according to the Mayo Clinic. However, the ideal humidity level for your home will depend mostly on the time of year, what kind of clothes you’re wearing, and where your family is naturally comfortable. Most experts say that the ideal house humidity should be between 30 and 50 percent, but definitely below 60 percent in the summer months. Low levels of humidity lead to very dry air which increases the prospect of catching airborne viruses like the flu, possibly due to both their ability to survive longer in dry cool conditions and irritated nasal passages making it easier to catch them. On the other hand, too much humidity creates a breeding ground for mold and mildew, which results in costly damage. Over time, high humidity levels can cause wood to rot and attract unwanted insects. Too much humidity also causes swelling in furniture and other items, causing them to warp. Therefore, it is important to keep the humidity level in your home balanced and adjusted to match your comfort levels.