Dometic | RV Universal Air Distribution Box | 3314850.000 | Non-Ducted | For use with Wall ThermostatThe Dometic RV Universal Air Distribution Box (3314850. 000) enhances the airflow from your rooftop air conditioner, ensuring efficient air distribution and return. It includes a return air filter to prevent dirt buildup on the cooling surface, but controls are managed via a separate Dometic wall mounted thermostat. Compatible with Dometic Penguin and Brisk Air II models Distributes air from and to the rooftop A C unit Integrated return air filter