Best Models K29, K34, K3139, K7388, K7788, K8087, IS23, and IS170 feature a flue that can be reversed to provide non-ducted re-circulating convenience. Just add charcoal filters, or a non-ducted re-circulating kit.

Model K41 can be converted to non-ducted operation with the addition of an optional REKIT41F kit that includes a re-circulating flue and charcoal filters.

Models P195 and 326 can be installed non-ducted by adding charcoal filters. Just add a standard duct to the exhaust outlet and vent air back into the kitchen through the soffit.