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Continuous flow internal flueing guide: 11748-E 05-15
Flueing options and suitability
Direct flueing
For direct flue installations through an external wall using the direct flue kit FFSSKIT—
maximum wall thickness 430 mm (EFi250) and 485 mm (HDi200).
Horizontal extension flueing
For flue installations through an external wall using the direct flue kit FFSSKIT and additional
lengths of pipe.
Vertical straight flueing
Installations where the internal unit is flued vertically through the roof.
Combination flueing
Installations using a combination of horizontal and vertical flueing.
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The flueing for internal water heaters is a coaxial design. It has a stainless steel
inner pipe to discharge products of combustion and a thermoplastic outer
pipe for air supply to the appliance.
Each Rinnai INFINITY water heater is flued individually, refer flueing options diagram below.
Please note
The installation and flue component images throughout this guide refer to our current
internal models only (HDi200 and EFi250). Please adapt the information as necessary if
you are referencing this document for the discontinued XR26i internal or HD200i internal
models.
