Puritan Bennett GoodKnight 420E Auto CPAP Machine
Top Reviews
"
VERIFIED CPAP.COM CUSTOMERThe 420E replaced a CPAP and from first use allowed me refreshing sleep, great product."
July 21, 2008
"
VERIFIED CPAP.COM CUSTOMERI'll use the 420E as a travel Machine. I tried the Machine at home, quieter and more adjusted to my breathing."
September 9, 2006
Product Overview
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.
Product Features
- Smallest, lightest CPAP on the market.
- SilverLining 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.)
- Automatic altitude adjustment.
- Direct DC operation without the need for a DC/AC inverter, just a cable and adapter which are sold separately.
- Automatic leak compensation.
- Two washable, reusable pollen filters are included; optional ultra-fine filters are available.
- Two year manufacturer warranty against defects.
Specifications
This Product Includes...
- 420E APAP Machine
- 6 Foot Hose
- Carrying Case
- 2 Reusable Foam Filters
- All Manuals
- Power Supply
Product Specifications
Pressure Range | 4cm to 20cm H2O |
Ramp Time | 0 to 30 minutes in CPAP mode; Automatic in Auto mode. |
Starting Ramp Pressure | From 4cm up to CPAP pressure, patient-adjustable in CPAP mode |
Dimensions | 5.6" x 2.9" x 7.7" |
Weight | CPAP: 1.54 lbs.; Power Supply Module (included): .21 lbs.; Total weight 1.75 lbs. |
Altitude Compensation | Automatic - maximum height 7800 feet. |
Electrical Requirements | 100 - 240 AC, 12volt DC |
CPAP.com always offers these services:
- 8 am to 8 pm CST Toll Free Phone and Email Support
- 24 hour access to our CPAPtalk.com Support Forum
- Learning Center for information on sleep apnea and cpap equipment
- Consumer Purchasing Trends Reports
- Warranty Services for all items purchased through CPAP.com
- Insurance Compliant Invoices
- Free Prescription Request System
Important Tips
This small CPAP has been very popular because of the size and weight, especially as a second machine for travelers, but it can certainly be your 'every night' machine with as long a life expectancy as any other CPAP. It is a great product.
The GoodKnight 420E Auto CPAP is capable of recording information about your sleep, such as snoring or apnea events, as well as pressure delivery response. The information can be downloaded with the purchase of the SilverLining Data Management software and cable.
The GoodKnight 420E Auto CPAP can be used with a separate passover or heated humidifier.
CPAP 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 420 line of machines can experience power problems when used with a Full Face Mask at pressures exceeding 15 CM/H2o. If you wish to use this mask configuration, please consider a different machine.
Error Note: If the machine displays an error 7 or "ER 7" this indicates an issue internally with the machine's blower. You can contact the provider of the machine to seek service if it is available, or the machine may need to be replaced.
Manufacturer Warranty
This machine comes with a 2 Year Manufacturer Warranty. CPAP.com will work with the manufacturer on your behalf if the machine needs repairs. Please follow these steps:
- Contact us at cpap@cpap.com or 1-800-356-5221 to receive an RMA (Return Merchandise Authorization) Number before returning the equipment
- Include a note with the machine describing the issue you are experiencing, along with your full contact information to include a return shipping address and the RMA number provided to you
- Ship only the defective items to CPAP.com at 13235 N Promenade Blvd Stafford, TX 77477
- Do not return accessory items such as the carry bag, hose or power cords
- Loaner Machines are available for rental during the warranty process
- Email updates will be sent to keep you informed as the machine moves through the warranty process
- CPAP.com will contact the manufacturer on your behalf and handle all shipping between us and the manufacturer
- The repaired or replaced unit will be returned to you. Shipping charges may apply.
Please note: The manufacturer warranty is voided by water damage or misuse of the machine.
Power Options
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.
CPAP.com Battery Kit for GoodKnight 420 Series Machines
The 2.5 lb CPAP.com 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 CPAP.com 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.
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CPAP Video & FAQ
Frequently Asked Questions (FAQs)
- How can I compare different machines?
- We work very hard to provide many different ways for our customers to compare products. Here are the machine product guides we have created and maintain:
- CPAP Machine Comparison Guide. This guide stacks up every CPAP machine we sell, feature by feature. If you don't know the meaning of a feature, click the question mark for a definition. The links below will take you to the most popular CPAPs, or all CPAP machines we sell.
Compare Most Popular CPAP Machines
Compare All CPAP Machines
- Auto Adjusting Machine (APAP) Comparison Guide. This guide stacks up every APAP machine we sell, feature by feature. If you don't know the meaning of a feature, click the question mark for a definition. The links below will take you to the most popular APAPs, or all APAP machines we sell.
Compare Most Popular APAP Machines
Compare All APAP Machines
- BiPAP, VPAP and BiLevel Comparison Guide. This guide stacks up every BiPAP machine we sell, feature by feature. If you don't know the meaning of a feature, click the question mark for a definition. The links below will take you to the most popular BiPAPs, or all BiPAP machines we sell.
Compare Most Popular BiPAP Machines
Compare All BiPAP Machines
- CPAP Machine Comparison Guide. This guide stacks up every CPAP machine we sell, feature by feature. If you don't know the meaning of a feature, click the question mark for a definition. The links below will take you to the most popular CPAPs, or all CPAP machines we sell.
- Which CPAP masks work on which machines?
Any mask will work with any machine, with one important exception. The ResMed AirMini is only compatible with certain ResMed CPAP masks. Compatible masks for the AirMini are as follows:
- ResMed AirFit™ N20 Nasal Mask
- ResMed AirFit™ F20 Full Face
- ResMed AirTouch™ F20 Full Face
- ResMed AirFit™ P10 Nasal Pillow
When considering another CPAP, APAP or BiPAP machine from ResMed or any other manufacturer, mask compatibility extends to all brands. The AirMini uses non-standard tubing to connect the machine to the mask, and is the primary reason why other masks won't work with the AirMini. Despite this issue, many of our customers consider the AirMini to be an excellent machine.
- How do I choose the machine that is right for me?
- We provide our customers with many tools to make informed decisions about their machine purchases. Options include:
- Calling a CPAP Expert Toll Free. 800.356.5221.
- Comparison Charts. These charts compare available machines, feature by feature. If you don't know the meaning of a feature, click on the question mark for a definition. Click on the image or name of the product for more detailed product information, pictures and resources.
CPAP Comparison Chart
APAP Comparison Chart
BiPAP Comparison Chart
- Browse Our Machine Product Categories. These categories show each machine our company offers, ranked by popularity. Popularity is determined by a mix of sales data and our in house opinion of the quality of the machine based on our experience and customer feedback. The best products float to the top of our categories.
CPAP Machine Category
APAP (Auto Adjusting) Machine Category
BiPAP (Two Pressure) Machine Category
- Calling a CPAP Expert Toll Free. 800.356.5221.
- What comes with my machine?
- Machines come with a six foot hose, power cord, at least one filter, and manuals. Most manufacturers include a carrying case which is designed specifically for their equipment. CPAP, APAP, and BiPAP machines do not come with a delivery system or mask. CPAP masks must be purchased separately.
To see the list of what specifically comes with each machine, you can Browse for a machine. Then on the product page, click the "Specs" tab to see a full list of what comes with the machine.
- Are prescriptions required for mask, machine, humidifier, and Provent purchases?
- Yes. Federal law requires we have a valid prescription on file before we ship your mask, machine, humidifier,
or Provent.
We provide many easy ways to get your prescription:- We can request your prescription for you! When you checkout, just let us know you would like us to request your prescription, or you can log into your account to have us request your prescription.
- Fax your prescription to our toll free fax number: 866.353.2727, or our international fax number: 713.541.7370
- Email your prescription to cpap@cpap.com
- Upload your prescription in your account, under the Prescriptions Section
- Ask your doctor to fill out our prescription form. We have both a standard prescription form and a Provent prescription form.
- What are the CPAP, BiPAP, Sleep Apnea, and Oxygen related HCPCS, CPT or billing codes?
- A7034 is Nasal Mask
- A7034 is Nasal Pillow Mask
- A7030 is Full Face Mask
- A7027 is Hybrid Mask
- A7044 is Oral Interface Mask (Oracle)
- A7035 is Headgear for Mask - Any Style
- A7036 is Chinstrap - Any Style
- A7032 is Replacement Nasal Mask Cushion
- A7033 is Replacement Nasal pillows
- A7031 is Replacement Full Face Mask Cushion
- A7028 is Replacement Hybrid Mask Cushion
- A7029 is Replacement Hybrid Mask Nasal Pillow
- A7046 is Replacement Humidifier Chamber
- A7037 is Tubing / Hose - Long & Short Tubes
- A4604 is Heated Tubing
- A7038 is Disposable Filter (White / Paper)
- A7039 is Washable Filter (Gross Particle / Foam/ Black)
- E0601 NU is CPAP Purchase
- E0601 NU is APAP Purchase
- E0470 NU is BiPAP Purchase
- E0470 NU is BiPAP Auto Purchase
- E0471 NU is BiPAP ST Purchase
- E0471 NU is BiPAP Auto SV Purchase
- E0562 NU is Heated CPAP Humidifier
- E0561 NU is Passover or Cool CPAP Humidifier
- E0601 RR is CPAP Rental
- E0601 NU is APAP Rental
- E0470 RR is BiPAP Rental
- E0470 RR is BiPAP Auto Rental
- E0471 RR is BiPAP ST Rental
- E0471 RR is BiPAP Auto SV Rental
- E1356 is Oxygen Concentrator Battery
- E1357 is Oxygen Concentrator Battery Charger
- E1358 is Oxygen Concentrator DC Cable
- E1390 is Portable Oxygen Concentrator
E1399 is Miscellaneous and is used for other CPAP and Oxygen items.- What maintenance is required on machines?
- The only care a CPAP, APAP or BiPAP machine requires is to clean or change the filters at the air intake. This keeps the internal parts from accumulating dust. Fine paper filters should be changed out every 30 days, or when they appear soiled. Foam washable filters should be rinsed with clear running water once a week, allowed to air dry, and reinserted.
Here are some other suggested actions to care for your machine:- Keep the area around your machine clean by removing any dust from the area to improve the air quality delivered to your machine and to you.
- Keep the air intake of the machine unblocked. Curtains, bedding, and papers can easily block the air intake of your machine, reducing the airflow.
- If a humidifier is used with your therapy, do not pick up the machine with the humidifier attached. With most machines it is easy to spill water from the humidifier chamber into the machine causing damage. Manufacturer warranties are voided by water damage to the machine. To avoid this, remove the chamber from the humidifier and then remove the humidifier from the machine rather than transporting them together.
- If a humidifier is used, empty the water from the chamber every morning. Accidents happen. If a family pet or family member moves the machine and humidifier with water in the chamber it is more likely that water could be spilled into your machine. Water damage to a machine voids the manufacturer warranty.
- What does CPAP therapy do?
- CPAP therapy provides a constant airflow which holds the airway open so that uninterrupted breathing is maintained during sleep. It is traditionally provided through a nasal mask that seals around the nose to maintain the pressure level.
- Do all CPAPs use filters?
- Yes, all CPAPs use at least one filter that is usually a type of foam material and washable. Some CPAPs offer finer filtration with the addition of a disposable paper filter.
Cleaning and changing filters is the only maintenance required for a CPAP machine.
The filters are located at the back of the machine at the air intake. - What is exhalation relief?
- Exhalation relief is a comfort feature which reduces the air flow at the time of exhalation, making the breathing process more natural.
The following are the different types of exhalation relief names by manufacturer.
- Philips Respironics = C-Flex, C-Flex+, A-Flex and Bi-Flex
- Resmed = EPR (Expiratory Pressure Relief)
- 3B Medical = RESlex
- Apex Medical = PVA (Pressure Variation Algorithm) Pressure Relief
- Curative Medical = EUT (Expiratory Unloading Technology)
- DeVilbiss = SmartFlex
- Fisher & Paykel = SensAwake Technology
- Human Design Medical = Z-Breathe
- Somnetics = EZEX
Here are some machines with an exhalation relief feature:
Transcend Auto miniCPAP™ Machine with EZEX
PR System One REMStar 60 Series Auto with Bluetooth
AirSense™ 10 AutoSet CPAP Machine with HumidAir™ Heated Humidifier
+ See More - What is ramp?
- The ramp button on a machine is a feature that allows for a gradual pressure build-up to your prescribed pressure. The feature is enjoyed by those with high pressures because it eases up to their pressure.
- What data capable machines are available?
- CPAP machines which record full data (such as AHI and leak info):
- AirSense™ 10 CPAP Machine with HumidAir™ Heated Humidifier
- AirSense™ 10 Elite CPAP Machine with HumidAir™ Heated Humidifier
- DreamStation Pro CPAP Machine
- ICON Premo CPAP Machine with Built-In Heated Humidifier and ThermoSmart
- IntelliPAP Standard Plus CPAP Machine with SmartFlex
- Luna CPAP Machine with Integrated H60 Heated Humidifier
- PR System One REMStar 60 Series Pro CPAP Machine with Bluetooth
- RESmart™ CPAP Machine with RESlex with Heated Humidifier
- Transcend miniCPAP™ Machine
- Transcend EZEX miniCPAP™ Machine
- Transcend II Travel CPAP Machine
- Z1 Travel CPAP Machine
AutoPAP ("Autotitrating CPAP" or "APAP") machines which record full data:
- AirSense™ 10 AutoSet CPAP Machine with HumidAir™ Heated Humidifier
- AirSense™ 10 AutoSet For Her CPAP Machine with HumidAir™ Heated Humidifier
- Curasa Auto CPAP Machine with EUT
- DreamStation Auto CPAP Machine
- iCH Auto CPAP Machine with PVA and Built-In Heated Humidifier
- ICON Auto CPAP Machine with Built-In Heated Humidifier and SensAwake
- IntelliPAP AutoAdjust Travel CPAP Machine with SmartFlex
- IntelliPAP 2 AutoAdjust Auto CPAP Machine
- Luna Auto CPAP Machine with Integrated H60 Heated Humidifier
- PR System One REMStar 60 Series Auto with Bluetooth
- RESmart™ Auto CPAP Machine with RESlex with Heated Humidifier
- S9 AutoSet™ CPAP Machine
- S9 AutoSet™ CPAP Machine with H5i™ Heated Humidifier for Her
- Transcend Auto miniCPAP™ Machine with EZEX
- XT Auto CPAP Machine
- Z1 Auto Travel CPAP Machine
BiLevel ("BiPAP") machines which record full data:
- AirCurve™ 10 VAuto BiLevel Machine with HumidAir™ Heated Humidifier
- AirCurve™ 10 S BiLevel Machine with HumidAir™ Heated Humidifier
- DreamStation BiPAP Pro Machine
- DreamStation BiPAP Auto Machine
- IntelliPAP AutoBiLevel Machine with SmartCode
- IntelliPAP BiLevel Machine with SmartCode
- PR System One REMStar 60 Series BiPAP Auto with Bluetooth
- RESmart BPAP 25A Auto Bi-Level Machine with RESlex and Heated Humidifier
- S9 VPAP™ Auto BiLevel Machine
- S9 VPAP™ S BiLevel Machine
CPAP Machines that only record compliance data (hours used) are: - How do I change the pressure setting of my machine?
- When a physician orders a pressure change, or a patient moves to an area with a very different altitude and does not have an altitude compensating machine, there are a number of ways to ensure you are receiving CPAP therapy at the correct pressure.
Sleep laboratories and sleep disorder centers may be willing to make this pressure change. Just call a local hospital or ask your physician to recommend a sleep lab. Be sure to take your prescription.
A second way is to do it yourself. We sell manometers that are very portable, accurate, and simple to use. All the machines we sell come with instructions on how to set pressure to physician orders. Most patients have little trouble doing this themselves. If you need help we can talk you through the procedure. Contact us by phone at 1-800-356-5221.
Gauge Manometer (for pressure measurements)
Fisher and Paykel Water Column CPAP Manometer with HC325 Chamber
A third option is to ship the machine to us with the new prescription. We will set it and ship it back.
It is the law and good common sense to run all sleep disorder devices at the prescribed pressure. If you think your prescribed pressure is wrong, talk to your physician. - How do I use a battery to operate my CPAP?
- All machines can connect to DC power. Some machines are configured to operate on DC Power and have a DC power outlet. Other machines require AC power and will need an Inverter that turns DC power to AC power.
Having the proper equipment is the biggest key to successfully operating the machine from a battery. For example, if your machine does have a DC outlet and you want to run your machine from a marine battery, be sure to get the correct DC cable for the machine, as well as an adapter cable with alligator clips that fits over the cigarette lighter plug.
CPAP.com sells complete battery kits with everything you need for many machines including the correct cables for those machines and batteries. You can see if there is a battery kit available for your machine Here. If you have questions about the specific power needs of your machine, review the 'Power' tab found on the machine's product page, or give us a call at 1-800-356-5221. - Why might I prefer an APAP machine?
- Some CPAP users find it more pleasant to breathe with an APAP than with CPAP. The pressure delivered by an APAP machine automatically changes as needed to deliver the minimal pressure required to maintain the airway. The pressure delivered by a CPAP machine is set to a single pressure, the highest necessary to keep the airway open as determined during the sleep study. This is the case even when the higher pressure is needed only a fraction of the time.
- What does an APAP prescription need to say?
- An APAP prescription must contain all of the following information:
- One of the following words or phrases: "APAP", "AutoPAP", "AutoSet", "Auto CPAP", "Auto Adjusting CPAP", "Self Adjusting CPAP", "CPAP" or "Continuous Positive Airway Pressure" or similar term.
- Your physician's contact information
- Your physician's signature
- The patient's full name
An APAP prescription may contain the following information:
- Your pressure range (Optional, Not Required)
- Example: 4-20 CM/H20
- Example: 4-20
- Example: 6-18 CM/H2O
- Example: 6-18
CPAP prescriptions are accepted for Auto Adjusting (APAP) machines.
Here are some of our top selling APAP machines:
Transcend Auto miniCPAP™ Machine with EZEX
PR System One REMStar 60 Series Auto with Bluetooth
AirSense™ 10 AutoSet CPAP Machine with HumidAir™ Heated Humidifier
+ See More - How do I prepare for power outages with CPAP?
- There are a lot of back up battery choices out there that can give you peace of mind in case of a power outage. The Transcend Travel CPAP Machine has Battery Options available that can set up as a fail-over, back up battery. Review the 'Power' Tab on the machine page.
CPAP.com sells Battery Packs to accompany your machine if an integrated battery is not available. Visit CPAPtalk for more advice specific to your needs, or view this past thread on the topic here.