New for the Bosch Greentherm C 950 ES & C 1050 ES is the polypropylene concentric up-and-out venting kit consisting of the appliance adapter, a 90° elbow, and a termination. This is the simplest and quickest venting option possible for a condensing tankless unit. The outer metal pipe and the inner polypropylene pipe make it both lightweight and rigid. The termination is telescopic to allow for varying wall thicknesses.
This new PP concentric up and out vent kit is approved for the New Green Therm C950ES & C1050ES tankless water heaters. The PP concentric up and out vent kit is also approved for the Bosch Therm C950ES & C1050ES.
Before attaching the appliance adapter to the top of the heater, a second metal plate comes with the kit and would cover the other intake air hole. Then you would want to remove the exhaust collar from the top middle of the heater and then attach the appliance adapter as this will enable the heater to exhaust to the outside and also take its combustion air down the outer side of the same hole.
Bosch Greentherm PP concentric up and out vent kit (7738003210)
The Greentherm models C 950 ES & C1050ES are also approved for PP twin-pipe venting systems. Availability of generic PP vent pipe has increased and systems are becoming more popular due to ease of installation. The twin pipe installation would be used if the customer needed to go out a different area out the sidewall or through the roof and would need to take the combustion air from the outside also.
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