These Titan HEPA central vacuum bags are beneficial for asthma and allergy sufferers because HEPA filtration traps fine dust, dirt and allergen particles that trigger allergy and asthma symptoms. These HEPA Type bags fit the following central vacuums Titan: TCS5702, TCS6602. It is recommended changing the bag when it is 1/2 full or there is a loss of suction. This will keep your central vacuum system running at its peak performance.