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Puritan Bennett Goodknight 425ST Bi-Level

SKU Y-GK425ST

The GoodKnight 425ST Bi-Level machine by Puritan Bennett offers patients who require bi-level therapy with a back-up ventilation rate a compact, quiet choice in treating Obstructive Sleep Apnea or related sleep breathing disorders. As the world's smallest, lightest bi-level machine, the GoodKnight 425ST will not crowd the nightstand and is easy to pack for travel, making complying with prescribed therapy a snap for patients. Its ultra-quiet operation also helps ensure a peaceful sleep for patients and sleeping partners alike.
The Puritan Bennett Goodknight 425ST weighs in at only 1.5 lbs, making it an extremely popular choice for individuals who travel.


  • Convenient small size (weighs only 1.5 pounds and measures 3 inches high, 5.5 inches wide, 8 inches deep).
  • Adjustable ramp time for improved patient comfort.
  • Optional heated humidifier with very small footprint helps meet greater range of patient needs.
  • Hour and compliance meters help track patient compliance.
  • Optional Silver Lining 3.6 Data Management Software provides compliance information and other patient data in easy-to-format reports.
  • Travel-friendly features such as automatic altitude compensation and optional cigarette lighter adapter or portable battery pack make therapy compliance easy for patients
  • The 425ST includes a back-up ventilation rate this is needed by certain complicated cases of Obstructive Sleep Apnea - If you require and ST device, it will be indicated on your prescription or sleep study.
  • Includes a heated humidifier to ensure comfortable therapy for the user.


For additional information on this product (user manuals, manufacturer's info, articles, and forum posts), please visit our Product Resources area in our CPAP Community.


  • 110 Voltage:YES
  • 220 Voltage:YES
  • Altitude Adjustment:Auto
  • Can Use A Battery?YES
  • Data Card:NO
  • HCPCS Reimbursement Code:E0471
  • Heated Humidifier:Available, but not included
  • Included In Box:Bi-level ST machine, AC Power Cord, tubing, disposable filters, instruction manual, and carrying case
  • Integrated Battery:NO
  • Manufacturer:Puritan Bennett
  • Mask Off Alert:NO
  • Optional Software:Silver Lining 3.6
  • Prescription Required:YES
  • Pressure Range:4-25 cm/H2O
  • Ramp:0-30 Min. (5 Minute Intervals)
  • Warranty:2 years for machine
  • Weight:1.5 lbs (machine only)
  • Product Condition:NEW



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