It depends on whether the Chinese diesel heater you buy comes with a plateau kit or whether it is a plateau version. Many chinese diesel heaters are available for heights below 1500m.
The chinese diesel heater was originally designed to meet the heating needs of Chinese drivers, especially truck drivers, in the winter.
China’s terrain includes plains and plateaus. Chinese diesel heaters are often used in the northern plains, central plains, western plains and mountains, as well as the Qinghai-Tibet Plateau and the Yunnan-Guizhou Plateau.
If you want to use the chinese diesel heater at high altitude, please purchase a plateau kit or the plateau version of chinese diesel heater.