For comfort air zone, what should be the RH range? 

Maintaining an appropriate relative humidity (RH) level is crucial for creating a comfortable indoor environment. The recommended RH range of 40% to 60% offers several benefits for occupant well-being and structural integrity:

Comfort: A relative humidity level within this range helps prevent the air from feeling too dry or too humid, contributing to a more pleasant and comfortable living or working space.

Health: Proper humidity levels reduce the risk of respiratory issues and discomfort associated with overly dry or damp air. It also discourages the growth of mold and dust mites, which can be triggers for allergies and respiratory problems.

Energy Efficiency: Maintaining optimal humidity enhances the perceived comfort, allowing occupants to feel comfortable at slightly higher temperatures during warmer months and lower temperatures during colder months, leading to potential energy savings.

Preservation: Controlled humidity levels are crucial for preserving materials and belongings, preventing issues like wood warping, paper deterioration, and corrosion of metals.