Currenty, I modeling hotel contain bedroom with AC and bathroom without AC. Those rooms separated by glass door. Based on guest habit, the door maintains open so the conditioned air from the bedroom comes to the bathroom. There are two exhaust fan placed in the bathroom. How to combine the thermal zone between bedroom and bathroom? should I make it two zone? how to define airflow comes to the bathroom? I'm trying to use air network but I don't know the pressure difference between them. Or can I just make one zone contain bedroom and bathroom conditioned with AC and exhaust fan? What the consequences? Your answer will really helpful. Thanks.