Rinnai Concentric Venting
Rinnai Venting Rinnai tankless water heaters use a single tube for their venting, how do they do this? It’s quite a simple process that prevents two holes from being drilled in your wall. As you can see in the picture of the elbow, the vent pipe has two distinct sections. This type of venting piping is called concentric venting. The tankless concentric vent pipe handles both the incoming supply air as well as ejecting the toxic...
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