Do not leave a WSPL printer running unattended if it has previously overheated. Thermal runaway can cause a fire, especially in retail back offices.
The WSPL driver is broadly compatible with modern Windows environments and specific hardware lines: Operating Systems wspl printer driver hot
While "hot" is not a standard industry-wide driver feature, in the context of these specialized printers, it typically refers to a Hot Folder Do not leave a WSPL printer running unattended