Dometic FreshJet 3 Series, Rooftop RV AC Unit, 13.5 BTUFreshjet 3 Series, 13. 5K BTU Rooftop RV AC Unit 13,500 BTU Standard Profile Rooftop Air Conditioner, Ducted or Non Ducted Application Freshjet Model 3 FJX3473MWHAS FJX3473MBKAS is a direct replacement for Dometic Brisk Air II The FreshJet 3 Series rooftop air conditioner delivers powerful and quiet performance, with 13% higher cooling capacity, 15% more airflow, and a 4dB reduction in noise level for more restful sleep. Its 14% lighter and uses 28%