The heat exchanger is effectively the core of a tankless water heater — its job is to transfer energy from the burner to the water passing through it, delivering hot water on demand without sacrificing efficiency or reliability. On the Rinnai HDC1600i, this is the primary heat exchanger, and its condition directly determines how well the whole system performs.
This genuine Rinnai heat exchanger core is made to the original specification, built for reliable heat transfer, corrosion resistance, and long-term durability. Where the existing heat exchanger has worn or is starting to underperform, a genuine replacement restores the appliance's performance, reduces the likelihood of repeat service callouts, and helps the system keep running reliably for years to come.
⚠ Important: This part must be installed by an experienced Gas Safe registered engineer. Isolate the gas supply and electrical power before starting any servicing work.
The heat exchanger is where the actual work of heating your water happens, so it's not a component worth compromising on. This genuine core restores reliable, efficient heat transfer to the HDC1600i and is built to withstand the corrosive conditions inside a tankless system, giving the appliance a genuine second lease of life rather than a short-term patch.
Order the Rinnai HDC1600i Heat Exchanger online today.
| Manufacturer | Rinnai |
|---|---|
| Model Compatibility | HDC1600i |
| Part Number | P1600IKBX-KITB |
| Product Type | Heat Exchanger |
| Function | Heat Transfer Core for Tankless Water Heater |
| Replacement Part | Yes – Genuine Rinnai Component |
| Installation Requirement | Qualified / Gas Safe Engineer |
| Application | Hot Water Supply & Water Heater Repair |
