Metered air system refill is designed for use in the TimeMist 3000 Shot Micro Dispenser. TimeMist Yankee Candle collection offers premium fragrances for metered air fresheners. Air freshener refill lasts a full 30 days when set at 15-minute intervals. The Home Sweet Home fragrance emanates the scent of cinnamon, baking spices and a hint of freshly poured tea.