H4i™HEATED HUMIDIFIERUser Guide
Manufacturer:ResMed Ltd 1 Elizabeth Macarthur Drive Bella Vista NSW 2153 Australia.See www.resmed.com for other ResMed locations worldwide.For patent information, see www.resmed.com/ip.H4i, S8, Stellar and VPAP are trademarks of ResMed Ltd. Stellar and VPAP are registered in U.S.Patent and Trademark Office. © 2017 ResMed Ltd. 248693/3 2017-10
IntroductionThe H4i ™ is designed to moisten the air delivered to your airway during Positive Airway Pressure (PAP) therapy.Indications for useThe H4i is indicated for humidification of the air delivered from a ResMed compatible CPAP, bilevel and non-invasive ventilation device. The H4i is for use only as recommended by a physician.ContraindicationsThe H4i is contraindicated for use with patients whose upper (supraglottic) airway has been bypassed. Please also refer to the relevant system manual for contraindications associated with PAP therapy.
Components of your H4i
Accessories:
- H4i Water Chamber
- H4i Cleanable Water Chamber
- ResMed Tubing Wrap
Setting up your H4i for use
Preparation
System setup
- Align your H4i with your flow generator and push them together until they click into place.
- Connect the power cord to the socket on the rear of your flow generator.
- Plug the other end of the power cord into the power outlet.Place the combined unit on a firm, level surface near your bed at a level lower than your sleeping position. Ensure the surface is not sensitive to heat and/or moisture, or use a protective mat.
- Connect one end of the air tubing firmly onto the air outlet.
- Connect the assembled mask system to the free end of air tubing.
WARNING
- Make sure your flow generator is switched off at the power outlet before connecting the H4i.
- The H4i docking station should only be connected or disconnected when the water chamber is empty.
- Water must be prevented from entering your flow generator. Do not transport the flow generator with the H4i attached.
- The H4i is contraindicated for invasive use. An external humidifier approved for invasive use is recommended according to EN ISO 8185.
Filling the water chamber
- Open the cover.
- Remove the water chamber.
- Fill with fresh, clean water up to or below the maximum water level mark.Note: The water chamber must be removed from the H4i before it is filled or water may enter the flow generator. The spill guard must also be in place.
- Return the water chamber to the docking station.Note: Ensure that no water is collected between the heater plate and the water chamber.
- Close the cover ensuring that it clicks into place.
CAUTION• Do not overfill the water chamber as water may enter the flow generator and air tubing.• Do not use any additives (eg, scented oils and perfumes). They may reduce the humidification output of the H4i and/or cause deterioration of the water chamber materials.
Detaching your H4i
- Unplug the power cord from the power outlet.
WARNINGTake care when handling your H4i. The water and the water chamber base may both be hot. Allow 10 minutes for the heater plate and any excess water to cool. - Remove the water chamber from the docking station.
- Press the large silver button located midway underneath the docking station.
- Pull the H4i and flow generator apart.Note: Re-attach the connector plug firmly to your flow generator.
Starting and stopping treatment
Warming your H4i with the VPAP or S8 SeriesThe Warm-Up feature (not available on all ResMed PAP devices) is used to pre-heat the water before starting treatment. Skip this step if you want to start immediately.To start the Warm-Up feature:
- Select warmup by pressing on the control panel.
- The WARMING screen will appear to indicate that the Warm-Up feature is activated.
- While your H4i is in Warm-Up mode you can:• Start treatment at any time by pressing• Access the menus by pressing• Stop the Warm-Up feature at any time by pressing (This may not apply on all devices.)The Warm-Up feature will automatically turn off after 30 minutes if treatment has not started.
• Access the menus by pressing
• Stop the Warm-Up feature at any time by pressing Warming your H4i with the Stellar 150Your H4i will be automatically detected when the Stellar 150 is turned on. The treatment screen will give you the option to start warming up the humidifier prior to starting treatment. If the humidifier is heating, the related symbol is displayed at the top of the LCD screen.Note: The H4i can only be used when the device is connected to the mains power supply.CAUTIONH4i cannot be used for treatment pressures exceeding 25 cm H2O.Starting your treatment
- Turn the humidity control dial to three ( ). You can adjust the control dial-up or down at any time to find the setting that is most comfortable for you. The setting switches heated humidification off and delivers minimum humidification while a set of six ( ) delivers maximum humidification.Note: The ResMed Tubing Wrap is designed to enhance comfort by maximizing heat retention along the air tube.
- Start treatment as described in your device user guide.Note: The H4i is thermostatically controlled to maintain a constant temperature. The indicator light will brighten to indicate when the device is actively heating and dim when it has reached its set temperature.
- Lie down and arrange the tubing so that it moves freely when you turn in your sleep.
). You can adjust the control dial-up or down at any time to find the setting that is most comfortable for you. The setting switches heated humidification off and delivers minimum humidification while a set of six ( 
) delivers maximum humidification.Note: The ResMed Tubing Wrap is designed to enhance comfort by maximizing heat retention along the air tube.WARNINGDo not leave an excessive length of air tubing around the top of your bed. It could twist around your head or neck while you are sleeping.Stopping your treatmentTo stop treatment, refer to your device user guide.Note: In order to assist the heater plate in cooling, some flow generators continue to blow air gently for up to an hour after treatment has stopped. However, you can unplug the device from the power outlet at any time and allow the heater plate to cool without airflow.Cleaning and maintenanceYou should regularly carry out cleaning and maintenance of the water chamber, cover, and cover seal as described in this section.WARNING
- Beware of electrocution. Do not immerse your flow generator, docking station, or power cord in water. Always unplug the device before cleaning and be sure that it is dry before plugging it back in.
- Take care when handling your H4i. The water and the water chamber base may both be hot. Allow 10 minutes for the heater plate and any excess water to cool.
Disassembling the H4i cleanable water chamber
- Remove the spill guard by pushing up from inside the air inlet and pulling it away from the water chamber.
- Discard any excess water from the water chamber.
- Turn the water chamber upside down. Using the side tabs, disengage the latch by pushing the latch up and away.
- Remove the tub plate.
- Remove the tub plate seal.Note: Only the H4i Cleanable Water Chamber can be disassembled/reassembled.
Cleaning your H4i Water chamber Daily
Wash the water chamber, spill guard, tub plate, and tub plate seal in warm water, using a mild detergent. Use the yellow cleaning plug to assist in the cleaning process (see steps 1 to 4). Rinse thoroughly in clean water and allow them to dry away from direct sunlight.WeeklyThe disassembled cleanable water chamber, spill guard, tub plate, and tub plate seal may be washed in a dishwasher on the delicate or glassware cycle (top shelf only).Note: Not applicable to the H4i Water Chamber.Inspect the water chamber for wear and deterioration. Replace the water chamber if any component has cracked, become cloudy or pitted. Replace immediately if there is any leaking from the water chamber.White powder or deposits in the water chamber can be cleaned using a solution of one part vinegar to 10 parts water, as follows:
- Fill the cleaning plug to the rim with vinegar and pour it into the empty water chamber.
- Add clean water to the water chamber until the solution reaches the maximum water level mark.
- Let the solution soak for 10 minutes.
- Discard the solution and rinse the water chamber with clean water.
Cover and cover seal
- Remove the cover by gently flexing one cover arm away and up from the docking station until the cover detaches completely.
- Peel the cover seal away from the cover.
- Inspect the cover and cover seal weekly for wear and deterioration. Replace any damaged parts. When required, wash the cover and cover seal in warm water, using a mild detergent. Rinse them thoroughly with clean water and allow it to dry away from direct sunlight.
Docking stationPeriodically wipe the outside of the docking station (including the connector seal) with a damp cloth.CAUTIONDo not use any of the following to clean any part of the H4i as these solutions may cause damage and reduce the life of the product:
- bleach, chlorine-, alcohol- or ammonia-based solutions
- moisturizing, antibacterial or glycerine based soaps
- water softening and unapproved descaling agents.
Heater plateDo not allow water to collect on the heater plate. Wipe it with a clean cloth if necessary.
Reassembling the H4i cleanable water chamber
- Refit the tub plate seal into its groove on the cleanable water chamber.
- Reinsert the tube plate by slotting its feet into the catches.
- Reassemble the catch by lifting it up and over the water chamber and then pushing it down to lock it into place.Note: Only the H4i Cleanable Water Chamber can be disassembled/reassembled.
- Reinsert the spill guard into the water chamber recess and push it down to fit firmly into place.
Reassembling your H4i
Reassemble the parts when they are clean and dry.
- Align the cover seal to the guides on the cover and press along the edges to ensure it is fitted properly.
- Put one cover arm into its pivot point on the docking station and gently flex the other arm into its corresponding point. The cover should be able to open and close freely while securely attached to the docking station.
- Replace the water chamber in the humidifier docking station.
ServicingThe H4i should be inspected by an authorized ResMed Service Centre five years from the date of manufacture. Prior to this, the device is intended to provide safe and reliable operation provided that it is operated and maintained in accordance with the instructions provided by ResMed. Warranty details are provided with the device at the time of original supply. As with all electrical devices, if any irregularity becomes apparent, you should exercise caution and have the device inspected by an authorized ResMed Service Centre.
Frequently asked questions
| Question | Answer |
| Why is there condensation in my mask and/or air tubing? | Excessive condensation in your mask or air tubing may occur when the roomtemperature is low. To prevent condensation, turn the control dial down to a lower setting. You may need to adjust your humidity setting from season to season. The use of a ResMed Tubing Wrap can help reduce the effects of condensation. |
| Do I have to use distilled water in the water chamber? | Using distilled water will maximize the life of the water chamber and reduce mineral deposits. |
| What if I still have symptoms of dryness? | If you have symptoms of dryness, then your humidity setting may be set too low to be effective. Turn the humidity control dial-up.If you are still experiencing symptoms of dryness, you may be breathing through your mouth. Mouth breathing or mouth leaks cause drying and irritation of the upper airway. If this is a problem, a full face mask or chin strap may help. Consult your clinician or equipment supplier for details. |
Troubleshooting
If there is a problem, try the following suggestions. If the problem cannot be solved, contact your equipment supplier or ResMed. Do not open the unit.WARNINGService and repair should only be performed by an authorized service agent.
| Problem | Possible cause | Solution |
| Device not working (no display on an LCD screen and/or indicator light not lighting up) | The power cord is not plugged in properly.Faulty power outlet.Flow generator and docking station are not connected correctly. | Check that the power cord is plugged firmly into the power outlet and the switch (if available) is on at the outlet.Try another power outlet.Check that the docking station is securely attached to the flow generator. |
| Indicator light is permanently dull and/ or air does not feel warm | H4i reflector is dirty. | Clean the reflector with a damp cloth. |
| Leaking water chamber | The water chamber may be damaged or cracked.The tub plate is not attached correctly (not applicable to the H4i Water Chamber). | Contact your supplier for a replacement.Make sure the tub plate is fitted correctly. |
| No/low airflow | The air tubing is not connected properly.The air tubing is blocked, pinched, or punctured.The flow generator is not working correctly.The cover is not latched correctly.The cover seal is not fitted correctly. | Connect the air tubing as described in “Setting up your H4i for use” on page 1.Unblock or free the air tubing. Check the air tubing for punctures.See the Troubleshooting section in the flow generator manual.Make sure the cover is latched onto the docking station correctly.Make sure the cover seal is facing the right way up and fitted securely. |
| Water splashing on your face | The water chamber is overfilled.Condensation is forming in the air tube and mask. | Empty some water from the water chamber.Turn the control dial down.Use the ResMed Tubing Wrap. |
Technical specifications
| Maximum heater plate temperature | 85°C |
| Temperature cut-out | 93°C |
| Maximum gas temperature | 41°C |
| Dimensions (H x W x D) | Docking station and water chamber: 130 mm x 170 mm x 212 m |
| Weight | Docking station and unfilled water chamber: 786 g |
| Water capacity | To maximum fill line: 390 mL |
| Power supply | Input range for ResMed devices with H4i: 100–240V, 50/60Hz;110V, 400Hz; 2.5A <140 VA (110 W) (max. power consumption)Instantaneous peak power consumption <340 VA* Maximum heater element power: 85 W |
| Docking station | Flame retardant engineering thermoplastic plated cast aluminum |
| Water chamber | Injection-molded plastic, stainless steel, and silicone seal |
| Operating temperature | +5°C to +35°C |
| Operating humidity | 10–95% non-condensing |
| Storage and transport temperature | -20°C to +60°C |
| Storage and transport humidity | 10–95% non-condensing |
| IEC 60601-1 classification | Class II (double insulation), Type CF |
| Electromagnetic compatibility | Please refer to your flow generator user’s manual for details |
* Actual average power consumption will vary depending on factors such as temperature setting, set pressure, the use of accessories, height above sea level and ambient temperature.
Humidifier performance
The following settings have been tested at 22°C, 40% RH ambient conditions:
| CPAP Mask Pressure | RH Output % | Nominal System Output AH * †, BTPS | ||
| cm H2O | Setting 3 | Setting 6 | Setting 3 | Setting 6 |
| 44> | 44>95 | >95 | 16 | 20 |
| 10 | >85 | >95 | 14 | 18 |
| 20 | >75 | >85 | 13 | 16 |
* AH- Absolute Humidity in mg/L.† BTPS- Body Temperature Pressure Saturated.
Note: The manufacturer reserves the right to change these specifications without notice.
Symbols that appear on the device
Caution;
Follow instructions for use;
Type CF equipment; 
Hot surface;
Class II equipment; 
Do not touch;
Humidifier control;
Maximum water level;
Environmental informationWEEE 2002/96/EC is a European Directive that requires the proper disposal of electrical and electronic equipment. This device should be disposed of separately, not as unsorted municipal waste. To dispose of your device, you should use the appropriate collection, reuse, and recycling systems available in your region. The use of this collection, use, and recycling systems is designed to reduce pressure on natural resources and prevent hazardous substances from damaging the environment.If you need information on these disposal systems, please contact your local waste administration. The crossed-bin symbol invites you to use these disposal systems. If you require information on the collection and disposal of your ResMed device please contact your ResMed office, local distributor, or go to www.resmed.com/environment.
General Warnings
A warning alerts you to possible injury. Specific warnings and cautions appear next to the relevant instructions in the manual.
- Use the H4i only for its intended use as described in this manual.
- Make sure that the water chamber is empty before transporting the H4i.
- The H4i is designed only for use with specific ResMed PAP devices. Do not use the H4i with any other PAP device.
- The H4i should only be used with delivery tubes or accessories recommended by ResMed. Connection of other delivery tubes or accessories could result in injury or damage to the device.
- The H4i, including the associated tubing, is for single-patient use and must not be reused on another person. This is to avoid the risk of cross-infection.
- There exists the possibility that if the device is placed above the level of the patient and is tipped over, or if the tubing is filled with condensate, the mask might fill with heated water. The H4i should therefore be used with caution in patients who are unable to guard their airways or are unable to pull the mask off, for example following a stroke. Attention should be given to the relative risks and benefits.
- Do not attempt to dismantle the H4i docking station. There are no user-serviceable parts inside. Repairs and internal servicing should only be performed by an authorized service agent.
- If liquids are inadvertently spilled into or on the H4i docking station, unplug the PAP device from the power outlet. Disconnect the docking station from the PAP device and allow the docking station to drain and dry before using.
- Do not operate the H4i if it is not working properly or if any part of the PAP device or H4i has been dropped or damaged.
- Keep the PAP device power cord away from hot surfaces.
- Do not drop or insert any object into any opening or tubes.
- Do not use the H4i in the presence of flammable or explosive materials.
- Explosion hazard—do not use in the vicinity of flammable anesthetics.
- Follow all precautions when using supplemental oxygen.
Limited warranty
ResMed Ltd (hereafter ’ResMed’) warrants that your ResMed product shall be free from defects in material and workmanship from the date of purchase for the period specified below.
| Product | Warranty period |
|
90 days
|
|
6 months |
|
1 year
|
|
2 years |
This warranty is only available to the initial consumer. It is not transferable. If the product fails under conditions of normal use, ResMed will repair or replace, at its option, the defective product or any of its components.This limited warranty does not cover: a) any damage caused as a result of improper use, abuse, modification, or alteration of the product; b) repairs carried out by any service organization that has not been expressly authorized by ResMed to perform such repairs; c) any damage or contamination due to cigarette, pipe, cigar or other smoke; and d) any damage caused by water being spilled on or into an electronic device.Warranty is void on products sold, or resold, outside the region of original purchase. Warranty claims on defective products must be made by the initial consumer at the point of purchase.This warranty replaces all other expressed or implied warranties, including any implied warranty of merchantability or fitness for a particular purpose. Some regions or states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.ResMed shall not be responsible for any incidental or consequential damages claimed to have resulted from the sale, installation or use of any ResMed product. Some regions or states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation may not apply to you.This warranty gives you specific legal rights, and you may also have other rights which vary from region to region. For further information on your warranty rights, contact your local ResMed dealer or ResMed office.
Filling the Water Chamber
| 248693-Eng/3 2017-10 |
| H4i |
| USER |
| EUR 2 – ENG |
Global leaders in sleep and respiratory medicine www.resmed.co
References
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