Safety is the most critical factor for heating appliances. For the North American market, products must have UL or ETL certification. For the European Union, CE marking, GS (Geprüfte Sicherheit), and RoHS compliance are mandatory. Ensure the units feature automatic tip-over protection and overheat protection (thermal cutoff). If sourcing from China via Made-in-China.com, always request valid test reports from accredited third-party labs like SGS, TUV, or Intertek to avoid customs seizures and liability issues.