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Puritan Bennett Goodknight 420S CPAP Machine

SKU Y-GK420S-NA

The GoodKnight 420S CPAP System by Puritan Bennett is the smallest and lightest continuous positive airway pressure (CPAP) device on the market. It is designed to help active sleep disorder patients preserve their lifestyles while complying with therapy.
The Puritan Bennett GoodKnight 420S model provides quiet, effective CPAP therapy for a wide range of prescriptions and includes the ability to record downloadable data about your sleep therapy. Using Silver Lining 3.6 software, you, or your doctor, can download information from each night of your usage of this machine. Track your apnea hypopnea index and determine how your therapy is working for you!
Weighing in at only 1.5 lbs the Puritan Bennett 420S is a very popular model for users who travel often.


  • Conveniently small size (weighs 1.54 pounds and measures 5.6 in. W x 2.9 in. H x 7.7 in. L).
  • Wide pressure range (4 to 20 cm H20).
  • Measures pressure at the mask, rather than the device, for a precise measurement and better comfort.
  • Ultra-quiet operation.
  • Adjustable pressure calibration.
  • Durable construction.
  • Automatic voltage regulator.
  • Altitude compensation feature.
  • Optional D/C power supply.
  • Automatic leak compensation.
  • Adjustable ramp start pressure.
  • Breathing compliance meter.
  • Two-year manufacturer warranty.

Please Note:This machine uses pressure line tubing. Standard tubing will not work with this machine.


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
  • Dimensions:5.6 in. x 2.9 in. x 7.7 in.
  • HCPCS Reimbursement Code:E0601
  • Heated Humidifier:Available
  • Included In Box:Machine, Patient Manuals, Tubing, Disposable Filter, Carrying Case
  • Integrated Battery:NO
  • Manufacturer:Puritan Bennett
  • Mask Off Alert:NO
  • Passover Humidifier:Not available
  • Prescription Required:YES
  • Ramp:0-30 Min. (5 Minute Intervals)
  • Weight:1.54 lbs
  • Warranty:2 Year
  • Pressure Range:4-20 cm/H2O
  • Product Condition:NEW



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Midlothian, VA 23112-2998
USA 		Telephone: 1.866.560.CPAP (2727)
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