US Patent 10495318 Balanced cooling duct for cooking oven

The present disclosure relates to a cooking oven having a cooling duct and a cooling fan that is laterally offset relative to a center of the inlet of the cooling duct. The cooling duct has two lateral cooling duct walls extended between the cooling duct inlet and a cooling duct outlet. The cooling duct is designed such that when the cooling fan is operated air flowing along the respective lateral walls will experience substantially equal pressure drop between the inlet and the fan.