On their blog "Real Estate Advice, Answers, and More" Nothnagle Real Estate references the impact of a home's scent on its market value. They write, "there is a direct connection between smell and people's moods so light fragrances can help create 'scent appeal' when used properly in the home ... A light floral fragrance can put people in a more pleasant mood while citrus scents tend to have an energizing effect. Vanilla is often found to be comforting and relaxing." And they further recommend that, "a small reed diffuser in a bathroom can keep the room smelling clean while not overpowering the space."
It makes sense, doesn't it? To make a house a home, you add curb appeal to the outside so why not add scent appeal to the inside?