zhè / tái / diàn / nuǎn / qì / kāi / yì / wǎn / shang / dà / yuē / yào / xiāo / hào / wǔ / qiān / wǎ / shí / de / diàn

这台电暖器开一晚上大约要消耗五千瓦时的电。

This electric heater uses about five kilowatt-hours of electricity overnight.