I have the same question about our 2018 Aria. I don't have a good answer, but it got down to 24° where I am right now and no signs of any problems.
I had the furnace set to 60°, kitchen slide in, water heater on, and cabinet doors under the sink open.
I'm on my way to Wakarusa for a service appointment, so if I do break something I'll be in the right place to get it fixed.
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