Qmark Date Code • Recent

: Some modern units incorporate the date directly into the first four digits of the serial number, where the first two are the year and the next two are the week . Example: 2205xxxx would mean the 5th week of 2022. Where to Find the Code

In 2005 and again in 2016, QMARK issued recalls for specific electric heaters that posed fire hazards. The recall notices didn't ask for a model number alone—they asked for a (e.g., "Units stamped F4 through M6"). If you don't read the code, you might be sitting on a dangerous, recalled unit. qmark date code