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Each kit includes a new flip top cover, seal, cleaning plug and standard H4i water chamber. The kit fits very quickly and easily onto any HumidAire 3i (H3i) Heated Humidifier and is a one time purchase.
USAGE: Once you've upgraded your HumidAire 3i with the Conversion Kit you should purchase HumidAire 4i chambers for all future chamber replacement needs.^literature~