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Old 04-13-2018, 04:15 AM   #15
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Originally Posted by tfryman View Post
Which machine do you use that you consider it "large"?

I also use my home machine in the MH but use the 12 Volt adapter cable and I use the humidifier. Was boondocking this past weekend with 2 fantastic vent fans running and the CPAP I got down to 12.1 volts in the morning on my 200 AH capacity battery bank so I am happy with that.
I have a respironic with a humidifier attached. It's about 8 in by 14 in.
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Old 04-13-2018, 04:16 AM   #16
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My CPAP is only about 8" square and I use it every night, wherever I am! We don't do any boondocking so I don't have to worry about that!
Hi thank you for the reply, do you have the brand or a photo of the CPAP machine?
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Old 04-13-2018, 10:17 PM   #17
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Are you all talking about pulse machines?
What about constant flow?
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Old 04-13-2018, 10:27 PM   #18
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I bought a 12 v cable for my Dream Station. Works for me.
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Old 04-16-2018, 11:57 AM   #19
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If you are plugged in and not boondocking, any of them should work fine. However, if running on batteries and power conservation is a concern, here are a couple of tips.

1. Some (most?) (Resmed and other brands) are 12volt machines and use a 110 converter to plug into the wall. For these, you can usually get a 12volt direct plug (looks like a cigarette lighter plug). Using a 12v plug, it will run much more efficiently than converting from 12v to 110 and back to 12v. You just need a 12volt jack near the bed. Since my breaker box is under the bed, it was easy to run a wire and put a 12v jack on the side of the bed pedestal.

For other machines, 12v plugs are not available, so this won't work.

2. If you can run it without the humidifier, it will use much less power. The heating unit in the humidifier sucks most of the power. You also may be able to run it with the heat turned off. I have an old machine where the humidifier broke long ago - it's the one I keep in the RV.

Hope this helps.
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Old 04-16-2018, 12:39 PM   #20
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Originally Posted by vawinger View Post
If you are plugged in and not boondocking, any of them should work fine. However, if running on batteries and power conservation is a concern, here are a couple of tips.

1. Some (most?) (Resmed and other brands) are 12volt machines and use a 110 converter to plug into the wall. For these, you can usually get a 12volt direct plug (looks like a cigarette lighter plug). Using a 12v plug, it will run much more efficiently than converting from 12v to 110 and back to 12v. You just need a 12volt jack near the bed. Since my breaker box is under the bed, it was easy to run a wire and put a 12v jack on the side of the bed pedestal.

For other machines, 12v plugs are not available, so this won't work.

2. If you can run it without the humidifier, it will use much less power. The heating unit in the humidifier sucks most of the power. You also may be able to run it with the heat turned off. I have an old machine where the humidifier broke long ago - it's the one I keep in the RV.

Hope this helps.
I guess I should have been more clear, the problem isn't the power. The problem is the size of the machine itself. I live in Hawaii and my RV is on the mainland so I have to travel back and forth to go pick it up. Traveling through TSA with a large lithium battery plus carrying the CPAP machine itself is a pain. That's why I'd like to get a smaller unit and just leave it in the RV. It's only a 24 foot RV and I'd like to save a little space.
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Old 04-19-2018, 05:12 AM   #21
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I have 3 Cpap machines with masks, tubes, etc. One at home, one in the RV and one in my overnight travel bag. All are different machines, but I donít really notice much difference when using. Cpaps are medical devices and require an Prescription. If you have a copy of your prescription, you can buy one locally or online at web sites like Cpap.com. These web sites have many to choose from including travel sizes. Web sites are great for doing research to find the one that is right for you. The only one I worry about the size and weight is the one for my overnight bag. If you donít have your prescription and canít get a copy, there are many cpaps available used or even new on eBay or Craigslist.
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