The Furrion 18K BTU Chill Cube ducted air conditioner requires the dedicated air distribution box to function properly and distribute cooled air throughout the RV. Although you have the adapter kits, the air distribution box is an essential component and cannot be bypassed for normal operation. Fortunately, the air distribution box is currently in stock and available for purchase at Elkhart RV Parts. Installing this box is necessary to complete your AC setup after removing the Coleman unit. We recommend ordering the air distribution box as soon as possible to ensure optimal cooling performance and avoid damage to the system. If you need assistance with the order or installation guidance, please contact our customer service team for expert support.