Have you ever accidentally left the flue open for several days after a fire? I sure have! I'm tired of it. I made this sign to remind me that the flue is open.
Print either single-color or with a filament change/MMU/two-head-printer/whatever to make it pretty. Up to you! I put some adhesive magnet strips on the back to keep it up, but this will obviously depend on your fireplace. Also obviously, if the place you plan to put it gets really hot, it will melt, so don't do that.
Font used is Stencilla, which is licensed only for personal use unless you pay the creator.
Fire texture generated by GPT.
The author marked this model as their own original creation.