Reznor 170039 Gasket

The Reznor 170039 Gasket is a critical top/bottom flue wrapper gasket engineered specifically for high-efficiency unit heaters. Designed to maintain a gas-tight seal between the heat exchanger and the flue collector box, this OEM Reznor replacement part prevents combustion byproduct leakage, ensuring the unit maintains its rated AFUE performance. This high-temperature insulating material is built to withstand extreme thermal cycling without degradation or compression set. For contractors performing preventative maintenance or Reznor heat exchanger repair, replacing the 170039 is standard procedure whenever the flue collector or wrapper is disassembled. This HVAC flue seal is compatible with Reznor gas-fired unit heaters including several series of the UDSA, UDSB, and UDAP models. Ensuring a precise fit for the Reznor model 170039 is essential for pressure switch stability and overall burner efficiency, making it an indispensable component for professional mechanical service kits in industrial and commercial heating applications.

Key Benefits

• Precision Fit: Designed for an airtight seal on the Reznor flue wrapper assembly to prevent carbon monoxide leakage into the space.
• Thermal Endurance: Constructed from high-density refractory materials to resist hardening and cracking under constant high-temperature operations.
• System Reliability: Helps maintain correct static pressure within the combustion chamber, preventing nuisance pressure switch trips.
• OEM Compatibility: Exact replacement part ensures dimensional accuracy for the Reznor 170039, reducing installation time in the field.

Common Questions

When should the Reznor 170039 flue wrapper gasket be replaced?
Technicians should replace this gasket whenever the combustion box is opened for cleaning or inspection, or if there is visible evidence of soot, scorching, or localized air leaks during a combustion analysis.

Is the 170039 gasket compatible with all Reznor unit heaters?
While used widely in the UDSA and UDAP series, it is specific to the top/bottom flue wrapper. Always reference the specific unit parts list or serial number to confirm this is the correct exhaust gasket for your installation.

Does this gasket require additional RTV sealant for installation?
No, this OEM gasket is designed to create a mechanical seal upon compression. Using additional silicone or sealants can interfere with the gasket’s ability to handle thermal expansion and contraction.

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.