Respironics DC to AC power inverter with Heated Humidifier

steven0104 · Post by **steven0104** » Wed Jul 18, 2007 6:34 pm

I spoke today with a Respironics representative ( 1-800-345-6443) regarding the Respironics DC to AC power inverter Model number F552097 sold by CPAP.com.

Apparently, they recently had an internal staff meeting in which this unit was approved for use with the Respironics heated humidifier (while using a Respironics CPAP unit).

CPAP.com's picture of this unit shows a Xantrex 300 PROwatt power inverter.

Has anyone had any experience with this unit?

A quick review of opinions on this forum warns against the use of inverters with heated humidifiers citing possible damage from the modified sine wave output.

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CPAPopedia Keywords Contained In This Post (Click For Definition): respironics, humidifier, cpap.com, CPAP, Power

dsm · Post by **dsm** » Wed Jul 18, 2007 11:37 pm

The only units I have heard of being damaged by modified sine wave output are the Resmeds (S7, Vpap III and s* models (I would also would include Vpap SV & Malibu Vpap Auto)).

The damage that I have heard of though, is to the main powersupply. I am not sure it applies to just the H/H.

DSM

Snoredog · Post by **Snoredog** » Thu Jul 19, 2007 12:22 am

modified sine wave is not really the problem, it is the load resistance of the heating element that usually causes problems.

The cpap.com website says nothing about being able to run the machine AND the humdifier:

https://www.cpap.com/productpage/respir ... erter.html

Most of the inverters now a days are the modified sine wave type. I wonder how long it will run powering the humidifier. I know the M series machines have greater "in-rush" current requirements over say a 420e so you have to be careful with battery selection if you are selecting a sealed lead acid battery with initial current limitations or the M series machine won't start off straight battery.

I was looking for my 400-watt Coleman, think it is the same thing but 100 watts more power, I was going to try it, but I put it "up" somewhere and cannot find it.

I found my 3000 watt Xantrex unit.