On average, a tandoor heats up in 40–60 minutes, depending on the model and the amount of firewood used. After reaching the desired temperature, it retains heat for a long time, allowing you to cook several dishes one after another.On average, a tandoor heats up in 40–60 minutes, depending on the model and the amount of firewood used. After reaching the desired temperature, it retains heat for a long time, allowing you to cook several dishes one after another.