Kenmore® 50500 Central Vac Allergen Replacement Vacuum Cleaner Bags. Allergen Performance bags makes having a cleaner house easier than ever before. These quality vacuum bags, with an efficiency rate of 95%, help keep your home free of dust, particles, letting you and your family breathe easier. Ideal for those who suffer from dust related or allergic discomforts. Our replacement vacuums bags are designed to keep your vacuum operating at maximum performance.