Rheem as-108840-18 Heat Exchanger Assembly

Product Description

The RHEEM as-108840-18 is a stainless steel heat exchanger assembly designed for use in residential or light commercial heating equipment. The heat exchanger is the core thermal transfer component in a gas furnace, separating combustion gases from the circulated air stream while transferring heat to the supply air. Constructed from stainless steel, this assembly offers resistance to thermal cycling stress and corrosion that is typical in high-efficiency condensing applications. Installation is performed by a licensed HVAC technician as part of a furnace repair or major component replacement service.

Heat exchanger assemblies are found in forced-air gas furnace systems, typically installed in the heat section of the unit. This part is suited for residential furnace repair applications where the original exchanger has developed cracks, corrosion, or mechanical failure. A failed heat exchanger is a critical safety concern due to potential combustion gas migration into the supply air stream, making prompt and correct replacement essential.

Key Features

• Stainless steel construction for durability under repeated thermal cycling
• OEM-style assembly for direct replacement in compatible RHEEM furnace units
• Full assembly format reduces field fabrication and simplifies swap-out
• Critical safety component separating combustion gases from conditioned airspace

Compatibility

Designed as an OEM-style replacement heat exchanger assembly for compatible RHEEM gas furnace systems. Verify model and serial number against RHEEM documentation before ordering to confirm fitment.

Installation Notes

Heat exchanger replacement must be performed by a licensed HVAC technician. Shut down gas supply and disconnect electrical power to the furnace before beginning disassembly. Follow applicable local codes and IFGC guidelines for gas appliance service. After installation, perform a combustion analysis and check for flue gas leaks before returning the unit to service.

Technical Specifications

• Material: Stainless Steel
• Unit of Measure: Each

Standard Information

• Brand: RHEEM
• Manufacturer Part Number: as-108840-18