KwiKool's KPO12 may require a hot air discharge when the unit is used in a confined space. If you are using the KPO outdoors it may not be necessary to connect a hot air discharge duct. The KK-DUCT20Y-25 is a single durable 25' length for 20" ducts. It can be used on both the KPO12 and KPO25 as a hot air discharge duct and on the KPO25 for supply and return air as well. It is constructed of single ply PVE polyester fabric for long lasting use.
KPO25 requires 4 ducts.