CPAPtalk.com

I just got back from camping for a single night at 15°F (-9°C). In the middle of the night, I got the bright idea to move my CPAP and hose into my sleeping bag with me I figured the warm air inside the bag would prevent frostbite on the end of my nose. It worked perfectly!

Until I farted.

I considered using a few of those disposable hand warmers near the air intake for the CPAP, but I'm not sure if those emit any kind of carbon monoxide or other gas that I'd rather not inhale. I pack my CPAP in a soft-sided tool bag with a rigid plastic bottom. Next time it's this cold, I'm going to try leaving the CPAP in the bag and putting a few of those hand warmers on the ground under the bag in hopes that the hand warmers will heat up the air inside the bag before the CPAP sends it to my face.

What kind of disposable hand warmers are you talking about?
The bits of coal you have to light up?
The chemical ones where you break a bit of metal inside?

They’re these little bags full of some kind of coarse powder that heats up when it’s exposed to air. There’s no metal piece or anything you have to light. You just take them out of the plastic package and shake them a bit to get the air flowing and they heat up. HotHands is the brand name.

Spudchucker wrote: ↑

Wed Dec 12, 2018 5:28 pm

They’re these little bags full of some kind of coarse powder that heats up when it’s exposed to air. There’s no metal piece or anything you have to light. You just take them out of the plastic package and shake them a bit to get the air flowing and they heat up. HotHands is the brand name.

https://en.wikipedia.org/wiki/Hand_warm ... ted_(iron)

"Air activated (iron)
Air-activated hand warmers contain cellulose, iron, water, activated carbon, vermiculite (water reservoir) and salt and produce heat from the exothermic oxidation of iron when exposed to air. They typically emit heat for 1 to 10 hours, although the heat given off rapidly diminishes after 1–2 hours.[1][2] The oxygen molecules in the air react with iron, forming rust. Salt is often added to catalyze the process.[3]"

But I doubt they would transfer much heat into the air around your machine.