Household appliances are not designed to withstand the hazardous materials utilized in a lab nor the processes in which they are utilized. Household hot plates should never be used in a laboratory.
Hot plates are normally used for heating solutions to 100 C or above when steam baths cannot be used. New hot plates should be designed in a way that avoids electrical sparks and other interlock features. Hot/stirrer plates have an additional risk when operators turn on the wrong feature.