Reznor 201635 Heat Exchanger

The Reznor 201635 Heat Exchanger is an essential OEM replacement component engineered for high-performance UDAP gas-fired unit heaters and UDAS separated combustion unit heaters. Specifically designed for 175,000 to 200,000 BTU models, including APD, UDBP, and UDBS series, this assembly ensures critical heat transfer efficiency in demanding commercial and industrial environments. Constructed from heavy-duty aluminized steel, the Reznor 201635 provides superior resistance to thermal fatigue and oxidation compared to standard materials, maintaining air quality by effectively separating combustion gases from the airstream. This HVAC replacement part features a precision-welded tube-and-header design and comes as a complete heat exchanger assembly including the required gasket kit for a secure, airtight installation. For technicians performing Reznor heater maintenance, this genuine Reznor 201635 ensures exact dimensional compatibility and factory-spec thermal output, preventing the capacity loss often associated with aftermarket alternatives.

• Precision Fit: Engineered specifically for Reznor UDAP 175-200 and UDAS models to ensure drop-in replacement without field modifications.
• Enhanced Thermal Transfer: Optimizes heat transfer surfaces to maintain 82%+ thermal efficiency ratings in Reznor unit heaters.
• Corrosion Resistance: Aluminized steel construction protects the core from the acidic condensate common in gas-fired applications.
• Installation Ready: Packaged as a total assembly with the Reznor gasket kit included, reducing labor time and ensuring a safe seal.

Is the Reznor 201635 compatible with both natural gas and propane heaters?
Yes, this heat exchanger is designed to handle the combustion byproducts of both fuel types when installed in compatible Reznor UDAP/UDAS units.

What is the primary material used in the 201635 assembly?
The assembly is fabricated from aluminized steel, which is the standard technical specification for Reznor HVAC equipment requiring durability and high-temperature oxidation resistance.

Does this part include the gaskets needed for the header plate?
Yes, the Reznor 201635 includes the factory gasket kit necessary to reseal the assembly to the burner and flue collection boxes during installation.

This item must be shipped via trucking. Please contact us for a freight quote.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.