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GoodKnight 420G
Puritan Bennett GoodKnight 420G Travel CPAP Machine
GoodKnight 420G

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Our Price: $220.00
Prescription: Rx Required - Fax it to 509-448-1540
Insurance Code: E0601
Manufacturer: Puritan Bennett

Availability: Usually Ships in 24 Hours
Product Code: Y-GK420GUS
This item is no longer available.

Description Technical Specs More Information
As of 6/7/2009 we may substitute a 420SP or a 420S for the order of a 420G. The SP and S are nearly identical to the G, but are slightly upgraded. The SP and S are the same size and weight as the 420G.

The GoodKnight® 420G Nasal 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 their prescribed therapy.

The Puritan Bennett GoodKnight 420G is our number one selling CPAP machine. The Respironics REMstar M Series product line is our number one selling line of CPAP machines, but the 420G consistently stands out as our most popular individual unit.

If you're not familiar with the newer, smaller CPAP machines you'll be surprised when you take this CPAP machine out of the box. It's super small and lightweight - almost unbelievable.

What's in the Box?
CPAP Machine with Power Cord

6-Foot Length of Tubing

Two Foam Filters

Carrying Case

Complete Set of Instructions

CPAP Machine

Replacement Parts & Accessories
6-Foot Length of Tubing CPAP Machine Part
420 Series Foam Filters - 2 Pack CPAP Machine Part
420 Series Ultra Fine Filters - 2 Pack CPAP Machine Part
  • Conveniently small size (weighs 1.54 pounds and measures 5.6" W x 2.9" H x 7.7" L).
  • Wide pressure range (4 to 20 cmH20).
  • 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.
Average Customer Review: 5 of 5 Total Reviews: 19 Write a review.

Related Products...
420 Series Ultra Fine Filters - 2 Pack
Our Price: $4.00

Ultra Fine Filters for 420 Series
420 Series Foam Filters - 2 Pack
Our Price: $4.00

Foam Filters for 420 Series

  0 of 0 people found the following review helpful:
I need a hose and headgear and mask February 23, 2017
Reviewer: Suzanne E. from Crosby, Texas  
I have this machine and love it but I need a hose and headgear and mask.   My machine is still working great where can I get these items.

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  0 of 0 people found the following review helpful:
CPAP MAQUINA August 8, 2013

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  0 of 0 people found the following review helpful:
Why Discontinued January 11, 2011
Reviewer: Gary Richards from South Africa  
I am currently using the Goodknight 420G and have a 420s which needs repairs, it is blowing out some really smelly air since I dropped it. Something is wrong with the motor I think. These are good machines, why are they discontinued. Where can I find replacement parts now

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  0 of 0 people found the following review helpful:
No frills, but it works. December 10, 2009
Reviewer: Michael Freeman from Reserve, LA United States  
This is my first CPAP machine.

I wasn't convinced that CPAP was going to do anything so I wanted to spend as little as possible on a machine.  Thus I got the 420G.

It was worth the price.  For roughly 1300 USD less than the local store wanted I've got a functioning CPAP.

Though to other newbies I would suggest considering getting a machine with Exhale Pressure Relief.  When I'm first going to sleep I have to push against the airflow when I exhale.  Once I get to sleep my breathing gets more shallow and exhaling isn't a problem.  The 420G works but I think it might be easier to get to sleep with a machine with EPR.

Also seriously consider a humidifier.  I live in southern Louisiana so I assumed humidity wouldn't be a problem.  However I've been having trouble with congestion and to be honest way more phlegm than normal.

In my opinion you won't go wrong with the 420G but some of the features of more expensive machines are probably worth the extra money in the long run.

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  1 of 1 people found the following review helpful:
This is a great product from an honest supplier. January 26, 2009
Reviewer: RICHARD / BETTY KESSELUS from BASTROP, TX United States  
We have purchased two 420 g for myself and my wife.  We use them at our lake house and to travel.  We also have large fancy ResMed units and i like the little 420g better.  CPAP-Supply is an honest supplier and I feel lucky to have found them.  We were guoted a price of $1600.00 plus each for the 420g from two other suppliers.  Everything offered by these unscurplus supplers is a rip off of your tax dollars through abuse of the medicare system.  Do us all a favor and report these abuses to your Represenatives.

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