Please click on a configuration picture below, for your information and drawings:

Preferred module airflow / venting configurations  20 oF 80 oF Rise & SS efficiency 80 %
                                      

Permissible module airflow / venting configurations 20 oF to 50 oF Rise & SS efficiecincy 80 %
                                         
(All  Airflow  and Vent Discharge Configurations are shown looking at the gas train & draft inducer)