I use a Philips Respironics Respironics DreamStation CPAP machine which has a heated humidifier and tube that I can shut off. My CPAP can run off of 12VDC and that's what I use in the TC or RPod.
When I'm traveling in my TC or in my small RPod trailer, I shut off the heated humidifier and tube and use it in "cold passover humidification" mode. That saves a lot of power. And doing so works ok for me.
There are cold passover humidifier devices available as well.
https://www.cpapwholesale.com/info/passover-or-heated-humidifierhttps://www.cpap.com/cpap-faq/Passover-CPAP-Humidifier
