https://duckduckgo.com/?q=outdoor+wood+furnace
There are many brands and models. They have a blower in the firebox so you can stick 30 inch logs, un-split and greenish or wet in them and they’ll burn without issue.
People around here that have them don’t bother to cover their wood stack. There’s a heat exchanger inside the house and it gets sent to the same duct work as your central AC.
You know, I think I saw one of those next to a big barn on the way to my BIL’s lake house for Thanksgiving. I thought it was a big smoker doing up a turkey for Thanksgiving, but now that I see some of these, I think it was one.