Respironics RP-M Series R3 Water Chamber Replacement

Respironics RP-M Series R3 Water Chamber Replacement SKU 1003758 UPC h90610037580 Replacement water chamber for the Respironics RP-M Series integrated humidifiers. This is the internal replacement water chamber only. PLEASE NOTE: There are currently TWO styles of Respironics M Series humidifiers in production, the R2 version and R3 version. The newer style, the R3 version, uses this chamber. The older R2 version uses a different water chamber. The newer style of M Series humidifier has a line under the number "5" on the temperature dial, while the older style does not have this line.