Bosch Therm Pro Venting and Accessories
For the Bosch Greentherm C 950 ES and C 1050 ES - and the Therm C 1210 ES and C 1210 ESC, is a common venting system of polypropylene pipe for up to four appliances. Offered in either a side by side or back to back configuration, these kits allow for a single vent pipe for all units. Combustion air must be taken from the room for multiple units common vented. A 3 Inch PVC 90 degree elbow would want to be placed on either the left or right air intake hole for the combustion air to keep anything from falling into the heater. This is mandatory for commercial applications, with multiple units installed and that the multiple units are common vented with either the side by side or back to back venting option. All other applications such as residential, single units, etc. must take the combustion air from the outside using 3 Inch PVC or 3 Inch diamater PP pipe.
Please refer to the installation manual for the Bosch tankless water heater for the combustion air requirements for the heater.