DIY & Home Improvement

The reason there's an altitude limitation is that there's no oxygen up here and it's likely to start producing a lot of carbon monoxide. I also wouldn't use it in a super insulated house. Note it can't be sold in California or Canada, it won't meet their strict indoor emissions controls.

Since you're right at the limit, you might get away with it, but get a carbon monoxide detector.

I'd be more inclined to get a unit that works with a through the wall vent.