Volatile composition dispenser with improved scent intensity control

A volatile composition dispenser, comprising:

• (a) a cartridge comprising a reservoir of at least one liquid volatile composition and a breathable membrane for enclosing the reservoir and evaporating the at least one liquid volatile composition into the atmosphere upon activation of the volatile composition dispenser, wherein the breathable membrane defines an Evaporative Surface Area (E);
• (b) a housing having opposing first and second walls that are joined along respective peripheries of the opposing first and second walls to define an internal compartment in which the cartridge is disposed, wherein a gap exists between the breathable membrane of the cartridge and the second wall of the housing, wherein the gap has a width ranging from about 1 mm to about 25 mm, wherein the second wall comprises a plurality of evaporation vents that enable fluid communication between the internal compartment and the exterior of the housing, wherein the first wall is free of any evaporation vent, and wherein the second wall is characterized by a Total Vent Area (T) ranging from about 5% to about 85% of the Evaporative Surface Area (E);
• wherein the Total Vent Area (T) is calculated as the area sum of all of the plurality of evaporation vents of the second wall;
• and
• (c) a scent intensity controller attached to the housing for adjustably covering at least some or portions of the plurality of evaporation vents on the second wall, wherein those evaporation vents or portions thereof that cannot be adjustably covered by the scent intensity controller define one or more un-adjustable openings on the second wall of the housing, wherein the one or more un-adjustable openings define an Un-Adjustable Vent Area (U), and wherein the Un-Adjustable Vent Area (U) is greater than zero and no more than about 15% of the Total Vent Area (T).