Rheem as-108840-19 Stainless Steel Heat Exchanger Assembly

Product Description

The RHEEM as-108840-19 is a stainless steel heat exchanger assembly designed for use in residential and commercial heating systems. The heat exchanger is the core component responsible for transferring combustion heat to the air supply while keeping flue gases isolated from the conditioned airspace. Constructed from stainless steel, this assembly is built to resist corrosion and thermal fatigue caused by repeated heating and cooling cycles. It is typically installed by licensed HVAC technicians during factory-warranty service, heat exchanger replacement, or full furnace rebuild procedures.

This assembly is suited for residential and commercial gas heating applications where a direct OEM-style replacement is required. Stainless steel construction makes it appropriate for both standard and high-efficiency furnace configurations that expose the heat exchanger to condensate or acidic flue gas conditions. When the supplier data or installation documentation identifies specific compatible model numbers, technicians should cross-reference the full model and serial range before ordering.

Key Features

• Stainless steel construction resists corrosion and extends service life in demanding heating environments
• OEM-style assembly designed for direct replacement in compatible RHEEM heating systems
• Maintains separation between combustion gases and supply air for safe system operation
• Suitable for both residential and commercial heating applications

Compatibility

Designed as an OEM-style replacement heat exchanger assembly for compatible RHEEM residential and commercial gas heating systems. Consult the equipment model and serial number documentation to confirm fitment before installation.

Installation Notes

Heat exchanger replacement should be performed by a licensed HVAC technician in accordance with local mechanical codes and the manufacturer service documentation. Always shut off gas supply and disconnect electrical power to the unit before beginning any disassembly. Inspect the flue passages, burner assembly, and cabinet seals during replacement and confirm there are no cracks or gaps in the installed assembly before restoring operation. A combustion analyzer and leak detection are recommended after reinstallation to verify safe and correct operation.

Technical Specifications

• Material: Stainless Steel
• Application: Residential and Commercial Heating

Standard Information

• Brand: RHEEM
• Manufacturer Part Number: as-108840-19