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The Rinnai 803000081 Outdoor Thermistor Kit is a genuine OEM replacement part designed for i-Series Plus combination boilers. This kit measures outdoor ambient temperature, enabling the boiler's outdoor reset control function. It automatically adjusts the heating water supply temperature based on external conditions, improving system efficiency and occupant comfort by preventing overheating on milder days.
Enhances boiler efficiency and comfort by adjusting heating based on outdoor temperature.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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