Replacement Humidifier Pad For AutoFlo Model 200 Humidifier This highly absorbent paper pad works with the following whole house, drum-type humidifiers: BestAir BA200G, 200G AutoFlo 200G, 2500, 200P, Peerless Air 31200. This belt is made of antimicrobial paper and offers a 20% increased output in humidity over foam pads. The A22W also fits the discontinued 200P and will boost the performance of that unit. The paper belt is made of antimicrobial paper and has a aluminum support layer to keep the belt from sagging. It must be changed twice per humidification season. Belt dimensions 4-5/8" W X 25" L. Includes 2 "velcro" strips to tie ends of belt together.