Why Doesn't The Hood Work Properly ? The Odour Remains In The Kitchen After Cooking

You may consider the following  solutions regarding the cause of odour : 

Setting of the hood

  1. Select hoods with Delay Time function or keep the hood running for 5 to 10 minutes before and after cooking
  2. Switch the suction power to higher level

Conditions of the filters

  1. Fully saturated charcoal filter may limit the air flow and affect hood performance
  2. In the event of fire, fully grease laden filters could be flammable and regular replacement is recommended

Installation of the air duct

  1. Check if the air duct installed properly