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H5i noises normal?
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Paptillian Offline

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Posts: 474
Joined: Jun 2013

Machine: S9 AutoSet
Mask Type: Nasal pillows
Mask Make & Model: Swift FX
Humidifier: H5i
CPAP Pressure: 4 - 10, EPR x2
CPAP Software: ResScan SleepyHead

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Sex: Male
Location: Pennsylvania, USA

Post: #1
H5i noises normal?
I want to poll the ResMed H5i heated humidifier users here because I'm trying to ascertain whether or not the sounds my unit makes are normal. They're very faint and hard to hear. If the blower unit is on, you probably won't notice them. The best time to catch these sounds is when you're heating up the water chamber before beginning treatment for the night.

The first sound is an intermittent clicking noise. I wonder if this is maybe the heating element or something expanding because of the heat?

The second sound comes from the area containing the LED that lights up red or blue in the water chamber. When the LED is red (chamber warming up), you can hear a faint fizzing/buzzing kind of sound and the LED seems to dim at the same frequency. It's analogous to a lamp with a ballast that's starting to go bad. You need to look really close at the chamber to catch this, otherwise you can't see the flickering of the light or hear the fizzing sound. Haven't had any issues with the humidifier function, though.

Thanks!
(This post was last modified: 06-29-2013 03:53 PM by Paptillian.)
06-29-2013 03:52 PM
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zonk Offline

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Posts: 7,908
Joined: Feb 2012

Machine: A10 AutoSet
Mask Type: Nasal mask
Mask Make & Model: Activa LT
Humidifier: Integrated /ClimateLineAir
CPAP Pressure: 9/13
CPAP Software: ResScan

Other Comments: CPAP since Nov 2010

Sex: Male
Location: Australia

Post: #2
RE: H5i noises normal?
Sound faulty to me, have it checked or replaced
Make sure the lid rubber seal not missing, lid hinges properly attached and you hear click when closing the lid
06-29-2013 04:32 PM
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OMyMyOHellYes Online

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Posts: 915
Joined: Mar 2013

Machine: Respironics 560 Auto
Mask Type: Nasal mask
Mask Make & Model: Resmed Mirage FX
Humidifier: Respironics System One (no heated hose)
CPAP Pressure: 08.0-15.0 cm/H2O
CPAP Software: EncoreBasic

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Sex: Male
Location: Texas

Post: #3
RE: H5i noises normal?
Never heard anything like that, but I don't pre-heat either.

I don't like electrical anything making buzzing or popping noises.

I would try to take it back to the DME and do a side-by-side comparison with a demo unit - at least that may give you some peace of mind if their H5i also does it.

Unless they just go ahead and say "No, we need to replace that" right up front.

OMyMy
(This post was last modified: 06-30-2013 08:46 AM by OMyMyOHellYes.)
06-30-2013 08:44 AM
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2Tim215 Offline

Preferred Members-2

Posts: 283
Joined: Oct 2012

Machine: S9 ResMed AutoSet
Mask Type: Nasal pillows
Mask Make & Model: Swift FX Nasal Pillow - Medium
Humidifier: ResMed H5i w/Climate Hose
CPAP Pressure: 6cm-12cm
CPAP Software: ResScan SleepyHead

Other Comments: OSA, Fibromyalgia, Rheumatoid Arthritis, Osteoarthritis, Gout, PTSD, & Meralgia paresthetica.

Sex: Male
Location: Finger Lakes Region, NY

Post: #4
RE: H5i noises normal?
I have had two H5i's, never heard anything like that with mine.

Tim
Finger Lakes Region, NY
06-30-2013 12:03 PM
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Paptillian Offline

Preferred Members-2

Posts: 474
Joined: Jun 2013

Machine: S9 AutoSet
Mask Type: Nasal pillows
Mask Make & Model: Swift FX
Humidifier: H5i
CPAP Pressure: 4 - 10, EPR x2
CPAP Software: ResScan SleepyHead

Other Comments:

Sex: Male
Location: Pennsylvania, USA

Post: #5
RE: H5i noises normal?
Vindication at last!

Here's a video from ResMed where you can clearly see the light flickering at about the 2:00-2:05 mark:
http://www.youtube.com/watch?v=8LmW9WMsdfI

Still really hard to see (you gotta look close and pay attention) Smile

Anywhoo, while that's all going on, if you press your ear right up to the unit and have a completely quiet room (put your hearing aid in if you have one), you can also hear the LED buzzing a little.

I found out with some Googling that the intermittent click is just the thermostat working.

Now why I ever noticed such a minute and unimportant detail in the first place I'm sure is a subject of study in some university psychology department.
07-08-2013 03:14 AM
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RonWessels Offline

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Posts: 465
Joined: Jun 2013

Machine: REMstar Auto AFlex DS560TS
Mask Type: Nasal mask
Mask Make & Model: ComfortGel Blue
Humidifier: REMstar Heated Tube DS6T
CPAP Pressure: 11 - 20
CPAP Software: SleepyHead

Other Comments: CMS50F Pulse Oximeter

Sex: Male
Location: Ontario, Canada

Post: #6
RE: H5i noises normal?
You've got to be kidding me. Do you have nothing better to do while wearing your CPAP than to study the indicator LED's and listen intently for subtle noises? Nothing better, like, oh, perhaps _sleep_? Wink

Yeah, I wouldn't worry about it. Given the current draw of the heater plate, there are bound to be slight transients when it switches on and off.

Edit: If you are really interested in sounds in the night, get yourself a couple of cats. Every new "crash" is a brand new exercise in "what did they get into now". Smile
(This post was last modified: 07-08-2013 05:11 PM by RonWessels.)
07-08-2013 05:07 PM
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Paptillian Offline

Preferred Members-2

Posts: 474
Joined: Jun 2013

Machine: S9 AutoSet
Mask Type: Nasal pillows
Mask Make & Model: Swift FX
Humidifier: H5i
CPAP Pressure: 4 - 10, EPR x2
CPAP Software: ResScan SleepyHead

Other Comments:

Sex: Male
Location: Pennsylvania, USA

Post: #7
RE: H5i noises normal?
Sleep is overrated Big Grin

My room is dark & quiet so I was able to easily hear the sounds the H5i makes, which led me to investigate.
07-09-2013 08:37 AM
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