Ita ce na farko mai amfani da na'urar dumama PTC mai ƙarfi (High-Voltage Coolant Heater-HVCH) a ƙasar Sin, wadda ke karya gibin na'urar dumama zafi mai ƙarfi-HVCH a fannin fasahar dumama zafi mai ƙarfi da ƙarfi, kuma tana iya ƙonewa fiye da awanni 1000. Ƙarfin guntu ɗaya yana kusan 110W/ch...
An kafa Hebei Nanfeng Automobile Equipment Group Co., Ltd. a shekarar 1993, ƙwararriyar masana'anta ce a fannin bincike da ci gaba, ƙira, samarwa da kuma sayar da na'urorin dumama motoci masu rahusa, na'urorin dumama PTC na ababen hawa masu amfani da wutar lantarki (High-Voltage Coolant Heater-HVCH) da kuma na'urorin dumama iska daban-daban...