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Category: CPAP Machines > CPAP Machines > BiPAPs & BiLevels
GoodKnight 425 Bilevel Machine. Not For Sale
This product no longer available and this information is for reference only. Newer Model Available: Sandman Duo BiLevel CPAP Machine with Built In Heated Humidifier.
Rated 4.7 out of 5 by 11 cpap.com customers. Read reviews.
This is a newly released product. Read rankings.
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Product Overview

This is a bilevel machine which differs from a CPAP in that it switches back and forth between two pressure levels, one higher and one lower, rather than providing one continuous pressure level. The pressure upon inhalation is higher to hold the airway open, but as the user exhales, the pressure drops to a preset lower level. A bilevel machine responds well to people with very high CPAP pressure needs, weak chest wall muscles, lung disease or other health problems that keep them from being able to exhale against a CPAP pressure. Read Full Description...

This Product Includes...
  • GoodKnight 425 Bilevel Machine
  • 6 Foot Hose
  • Carrying Case
  • 2 Reusable Foam Filters
  • All Manuals
CPAP Mask - Sold Separately
Heated Humidifier - Suggested
Disposable Fine Filters - Sold Separately
Software Kit - Suggested


Enlarge | More Pictures GoodKnight425


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Product Information


Basic Information

This is a BiPAP Machine
Made By Puritan Bennett
Part Number Y-GK425
1 Year Warranty

Learn More

Full Description
Pictures
Specifications
CPAP.com Comments

Media and Reviews

Videos
Frequently Asked Questions
User Reviews
Mfg Interviews (cpaptalk.com)

Compare

Features
Machine Sizes
Power Options
Warranty

Machine Pressure and Battery Options and Performance

Pressure Setting:   Inhale   Exhale 
Input Pressure

Shipping Info

This product is not for sale at this time.
N/a

$99.00 More For Free Shipping
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Prescription (Rx) Info

Required For BiLevel Machines
Toll Free Fax 1-866-353-2727
Email cpap@cpap.com
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Related Machines and Parts


Machines In This Product Line

Related Parts and Accessories

Heated Humidifier
Disposable White Filters
Reusable Foam Filters
SilverLining 3.10 Software Kit
12 volt DC Power Cord

Full Product Description

Bilevel is the generic term to describe these machines. BiPAP®, for Bilevel Positive Airway Pressure, is registered with Respironics; ResMed uses VPAP® for Variable Positive Airway Pressure.

The Puritan Bennett GoodKnight 425 Bilevel machine includes the following features:
  • Smallest, lightest Bilevel, BiPAP or VPAP on the market.
  • SilverLining 3.10 Data Management software option to download compliance and session data.
  • International power supply to operate on any AC current from 110 to 240 without adjustment to the machine. (An adapter may be needed to plug the CPAP into a wall outlet outside the US.)
  • Direct DC operation without the need for a DC/AC inverter, just a cable and adapter which are sold separately on our site.
  • Automatic altitude compensation adjustment.
  • Two washable, reusable pollen filters are included; optional ultra-fine filters are available.
  • 2 year manufacturer warranty against defects.
GoodKnight425a








GoodKnight425b


Compare Chart Specifications
Manufacturer:Puritan Bennett
Sound Level:31 dBA
Weight:1.6 lbs
Entire Weight:2.7 lbs
Entire Size:11" x 6.7" x 3.7"
Entire Size Package:11" x 12.5" x 5"
IPAP:4 cm to 25 cm H2O
EPAP:4 cm to 25 cm H2O
Bi-Flex:No
Spontaneous:Yes
Timed:No
Ramp:Yes
Optional DC Cable:Yes
Direct Battery Option:Yes
Auto Altitude Adjustment:Yes
Leak Compensation:Yes
Hour/Session:Yes
Heated Humidifier:GK150/ H2/HC 150
Passover Humidifier:Remstar Passover
Domestic Voltage-110:Yes
International Voltage-220:Yes
Optional Software:Silverlining
Smart Card:No
CPAP Mode:Yes
Auto On/Off:No
Warranty:2 Year
Other Specifications
Pressure Range 4cm to 25cm H2O

Ramp Time 0 to 30 min. (5-min. increments)

Starting Ramp Pressure From 4cm, patient-adjustable

Dimensions 5.6" x 2.9" x 7.7"

Weight Bilevel: 1.54 lbs.; Power Supply Module (included): 1.16 lbs.; Total weight 2.7 lbs.

Altitude Compensation Automatic

Electrical Requirements 100 – 240 AC, 12volt DC

CPAP.com Comments
This is a great bilevel machine, just as small and lightweight as the 420 series of CPAPs. Early in 2005, Puritan Bennett expects to release the component heated humidifier that will integrate with this bilevel. (The price of this unit does not include the humidifier.)

Bilevel machines come with a six foot hose, a travel bag and manuals. Masks are not included and must be purchased separately. We will be happy to help you with sizing and offer suggestions on current popular masks.

The 12 volt jack on this machine is not the same size as the 420 series cpap machines. Use the Respironics "12volt DC Power Cord (to connect CPAP to cigarette lighter socket)" for battery operations. Part # 1001956.

cpaptalk.com 425 Bi-Level Interview
User Reviews

BiLevel Travelling Machine   April 12, 2009

(4 out of 5) by Dittmar S.

"I've got a very convenient BiLevel machine at home, but its's quite heavy. So I bought the GoodKnight 425 - This machine is unbeatable for travilling use and I'm very comfortable with that piece."


1 of 1 found the review helpful.
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March 23, 2009

(5 out of 5) by Maria Teresa I, South San Francisco, CA

"This is a welcome change from my previous machine which was bulky and noisy. The Goodknight 425 is so quiet you can barely hear the machine when it is on. And it is so light and compact, it is very easy and very convenient to bring it anywhere."


4 of 4 found the review helpful.
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February 04, 2009

(5 out of 5) by William P, Crowley, TX

"Extremely quiet, works very well."


2 of 2 found the review helpful.
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Goodknight 425 Bilevel Machine   November 04, 2008

(5 out of 5) by Edwin C, Roebuck, SC

"This unit delivered everything I had hoped it would, and I am very pleased with the results.

There is a bit more noise when exhaling than with my bedside unit, but not a problem once you use it for a night or two. Also, the control buttons are a little more difficult to press than I am accustomed to, but not too difficult.

I liked the lightness of the unit when travelling, and will consider getting the humidifier as well.

The unit appears to be excellent in every other way."


3 of 3 found the review helpful.
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Small but perfectly formed   November 29, 2007

(5 out of 5) by Steve T.

"BiPAP Goodknight 425

Being in the Uk I receive a free BiPAP machine with service and treatment. Unfortunately this means that they are purchased bulk and tend to be the less portable type of machines. I like to travel and having to carry a heavy BiPAP around is a real chore, paticularly because I do not drive and have to use public transport.

The second effect of the Health Service monopoly is that very few BiPAPs are purchased privately so they tend to be expensive, double the price than in the USA. To purchase my Goodknight 425 in the UK would have cost me $1700 and a battery pack $700 so I had to import from America. In fact it would be cheaper for me to fly to the USA from England to buy a machine than to buy one here.

From confirmed order to arrival was 4 days, exceptionally speedy, and because it was medical equipment it carries no import duty or sales tax. There was a small amount of administration getting a prescription but that was not to difficult.

The machine itself is fantastic, light weight, small and easy to use, both US and UK power covered in the one power pack.
Combined with the batery pack and all the leads and tools it weighs less than ten pounds, half the previous weight that I was lugging around. I have used it for two nights now to make sure I can get used to it before I travel and it is fine. Excelent in fact, and so quiet.
Once I am fully comfortable and familiar with the machine I will try the battery combination to see how long it lasts with my BiPAP settings and how long it takes to charge.

If only I can work out some way of charging the battery by solar power then my stays on remote beaches will happen more often and with a lot less worry."


6 of 6 found the review helpful.
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Frequently Asked Questions (FAQs)

CPAP Faq  What is a BiPAP or BiLevel machine?
CPAP Faq  What is Humidification?
CPAP Faq  Do all CPAPs use filters?

Related Product Videos
Instructional CPAP Videos  Understanding Bipap, Bilevel, and VPAP (00:02:42)

This video can help to clear up some of the differences between Bipap, Bilevel, and VPAP.

Product Images
GoodKnight425 GoodKnight425a GoodKnight425b
puritan bennett goodknight bilevel with power cord  
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