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Puritan Bennett Goodknight 420G CPAP Machine

SKU Y-GK420GUS


EFFECTIVE AUGUST 21st, 2008 - The Puritan Bennett 420G is out of stock. We suggest the following machine:

SUGGESTED ALTERNATIVE MACHINES

 The Puritan Bennett Sandman Intro with Integrated Humidifier - weighing at only 2.65 pounds (including the heated humidifier!), this CPAP is one of our favorite new units to sell. It's sleek design, low noise level, and smart humidification system are only a few of its attributes:

Sandman Intro with Humidifier

We are sorry and for any problem this may cause and hope you will contact us with questions about our suggested CPAP alternative.

The GoodKnight 420G CPAP System 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 420G model provides quiet, effective CPAP therapy for a wide range of prescriptions.
Weighing in at only 1.5 lbs the Puritan Bennett 420G 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).
  • Ultra-quiet operation.
  • Adjustable pressure calibration.
  • Durable construction.
  • Automatic voltage regulator.
  • Altitude compensation feature.
  • Optional D/C power supply.
  • Automatic leak compensation.
  • Breathing compliance meter.
  • Two-year warranty.


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: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



Customer Reviews

Average Rating

I love this little machine! Awesome for traveling, great for home (really quiet too!), the 420G is the favorite, for me, of all of the different machines I have used. It was inexpensive for me but still a great all-around machine. I find the interface to be extremely user-friendly and the machine is really quiet at even my high pressure (16). Doesn't take up much space on the nightstand either! Definitely a great machine.
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I'd love to share my satisfaction with this machine. Aside from my elation with getting treatment in general, I couldn't be happier with my choice of machines. I have found it completely easy to use, as is the humidifier. The best part has nothing to do with how easy it is to use, its small size, or its low price, its the quiet. I had been very concerned that my wife would be trading the sound of snoaring for the darth-vader like rythms of the cpap. Neither of us could believe just how quiet the machine is. With the mask attached to the machine and my face, it is actually very difficult to hear either the machine running, or the air/my breathing. I've had the machine for about a month now, and my wife just told me the other day that she has had to actually check to see if I'm breathing during the night, because both the machine and my breathing are so quiet. Obviously, I have absolutely no experience with any other cpap machine, save the one used during my test(no idea what that was), BUT, I don't think I could have made a better choice. This machine rocks!
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CPAPSupplyUSA.com
US HEALTHCARE SERVICES, INC.
12730 Spectrim Lane, STE G
Midlothian, VA 23112-2998
USA 		Telephone: 1.866.560.CPAP (2727)
Fax: 1.804.353.4809
Information: info@cpapsupplyusa.com
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