In the US at least, external propane tanks exist but are relatively rare outside of use in outdoor grills. I know of a few places that have big propane tanks b

In the US at least, external propane tanks exist but are relatively rare outside of use in outdoor grills. I know of a few places that have big propane tanks bolted to the side of the building, but it’s predominantly in rural areas and for big kitchens — church parish halls, community centers, etc.