Description
Rheem-Ruud AS-104120-10 Heat Exchanger Assembly Overview
The Rheem-Ruud AS-104120-10 Heat Exchanger Assembly is a genuine OEM replacement component engineered to restore your Rheem or Ruud furnace to factory-specified performance. Heat exchangers are the heart of any forced-air heating system, separating combustion gases from the conditioned air stream to ensure safe, efficient heat transfer throughout your home or building.
Key Features
- Genuine Rheem-Ruud OEM replacement heat exchanger assembly
- Engineered for precise fit and compatibility with applicable Rheem and Ruud furnace models
- Constructed to withstand repeated thermal cycling and high-temperature combustion environments
- Maintains proper separation of flue gases from supply air for safe system operation
- Restores original heating efficiency and airflow performance
- Supports long-term system reliability when installed by a qualified HVAC technician
Why Replace Your Heat Exchanger?
A cracked or failed heat exchanger is a serious safety concern, as it can allow carbon monoxide and other combustion byproducts to enter the living space. Replacing a damaged heat exchanger with a genuine OEM assembly — like the Rheem-Ruud AS-104120-10 — ensures your system meets original design standards, maintains proper efficiency ratings, and keeps occupants safe.
Installation Notes
- Intended for installation by licensed HVAC professionals
- Verify compatibility with your specific Rheem or Ruud furnace model before ordering
- Refer to the furnace service manual for proper installation procedures and torque specifications
Part Information
- Brand: Rheem-Ruud
- Part Number / SKU: AS-104120-10
- Component Type: Heat Exchanger Assembly







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