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GoodKnight 420E Auto CPAP Machine

This is an auto-adjusting CPAP machine which is set for a range of pressures, then seeks out and delivers the lowest level of pressure needed to keep the airway open. The pressure level will vary as needed, but it will not lower with each exhalation as a bilevel does. The auto-adjusting CPAPs were designed for patients who are unable to participate in a sleep study or whose pressure needs vary during the night according to their stage of sleep or sleep position. However, any patient will receive very comfortable therapy from this type of CPAP.

Manufactured by Puritan Bennett.

Item #Y-GK420ENA

This product no longer available and this information is for reference only. Newer Model Available: Sandman Auto HC CPAP Machine with Built In Heated Humidifier.
Replacement Parts

Have a question? Call us!

1-800-356-5221(Mon-Fri 8AM-10PM CST, Sat 8AM-6PM CST)

CPAP Power Options

Universal Power

The Goodknight Series operate automatically between 110v and 240v AC. When traveling either inside or outside the USA, there are no switches to switch or fuses to change. The machine will automatically sense what voltage is needed and set itself to run on the power needed.

The user will need to adapt the plug that goes into the wall to fit the style of outlet socket that is being used. This is simply done with a Power Adapter Plug kit. This is the same type of plug adapter that would be used with a hair dryer or an electric shaver. World Traveler Power Adapter Plugs.

GoodKnight Series DC Power Cord with Cigarette Lighter Adapter

The Goodknight series come equipped with a DC plug on the back of the unit. This allows the user to connect the CPAP to an external DC battery source. Using a Puritan Bennett, 12volt DC Power Cord, the GoodKnight 420 Series can be powered by plugging into a cigarette lighter plug. This is ideal for traveling by car, boat, or recreational vehicle that is equipped with a cigarette lighter plug. Battery Kit for GoodKnight 420 Series Machines

The 2.5 lb Battery Pack is surprisingly small and lightweight. The lithium ion battery can be recharged at any discharge level without losing charge time due to battery memory loss. This battery has been approved by the United Nations and Department of Transportation as tested safe for travel. This battery kit comes with the battery and the GoodKnight 420 Series 12 Volt DC Power Cord.

Respironics Battery Kit for GoodKnight 420 Series

This portable battery pack is an external lead acid battery that is the ultimate in power, portability and convenience. This battery kit comes with the Respironics battery and the GoodKnight 420 Series 12 Volt DC Power Cord.

Machine Pressure and Battery Options and Performance

*Note: This is a battery life estimation based on the battery and the machine. Each machine has unique power needs. Look for the Battery kit that has all the cables needed to safely run your machine. Each battery kit page contains a note about which machines are compatible with that specific battery kit. Please always read the "Important Tips" tab for further information on battery use.

Input Pressure Setting: