A system for consistently emitting a volatile material includes a volatile material dispenser having a diffusion element. The system further includes a refill adapted for disposal within the volatile material dispenser and including a container having a volatile material disposed therein and a wick having a first end disposed in contact with the volatile material in the container and a second end extending out of the container. A product of an evaporation rate at steady state of the volatile material and a height of a stem of the wick, divided by a cross-sectional area of the wick stem is less than 1.4e-4 kg m-1 s-1 and greater than 6.4e-6 kg m-1 s-1, or more preferably is less than 1.4e-4 kg m-1 s-1 and greater than 10e-6 kg m-1 s-1.
