Economical is the most common gas barbecue oven with ceramic plates on both sides on the market, which is smokeless. The principle is that oil will not drip on the ceramic plate when heated on both sides, so it is smokeless.
The luxury type is heated by the middle tube, so it is smokeless, because the oven temperature is very high, which can reach about 800 degrees normally, and the grease pressed on the tube will not stay and fall off directly, so there is no smoke; But it also depends on the type of kebab. If you roast lamb kidneys and kebabs, the effect is obvious.
Attached are two pictures for reference only. I hope I can help you and adopt them! ! !