Which method can be used to reduce indoor moisture levels?

Using dehumidifiers is an effective method for reducing indoor moisture levels because these devices are specifically designed to extract excess humidity from the air. They work by drawing in humid air, passing it over cooling coils, which condense the moisture into water, and then releasing the drier air back into the room. This process helps maintain a comfortable humidity level, which can prevent mold growth, improve indoor air quality, and create a more comfortable living environment.

Other methods mentioned, such as closing windows tightly, may limit fresh air circulation but do not actively remove moisture, potentially leading to stagnation of humid air. Adding carpeting can actually contribute to higher moisture levels, as carpets can trap moisture and promote mold growth if not properly managed. Using heavy curtains can block sunlight and trap humidity but does not actively reduce moisture in the air. Therefore, using dehumidifiers stands out as the most proactive solution for controlling indoor humidity effectively.