Lennox 17D78 Drain Pan

The Lennox 17D78 Vertical Drain Pan is an essential OEM replacement component designed for high-performance HVAC condensate management in specific vertical-aligned evaporator coil configurations. This genuine Lennox replacement part ensures a precise fit, maintaining the structural integrity of the secondary drainage system to prevent property damage from moisture accumulation. Measuring approximately 21" x 19.5", this vertical drain pan is engineered to withstand constant exposure to corrosive condensate and thermal cycling within the air handler. For technicians performing HVAC system repairs, using this OEM Lennox part is critical for ensuring the proper pitch and drainage flow required by factory specifications. This secondary drain pan effectively captures moisture shed from the coil, preventing bypass and protecting the internal furnace or fan coil components from premature oxidation. Rely on this Lennox 17D78 to restore factory-standard performance and reliable moisture mitigation in any residential HVAC maintenance or commercial application requiring a vertical configuration.

• Precision Component Alignment: Engineered specifically for Lennox vertical evaporator coils to ensure 100% compatibility and leak-proof performance.
• Durable Material Construction: High-grade composite material designed to resist cracking and corrosion from continuous condensate drainage.
• Efficient Moisture Control: Optimized pan depth and outlet positioning to prevent water stagnation and secondary overflow issues.
• Field Reliability: Direct OEM replacement simplifies installation for contractors, eliminating the need for field modifications common with "universal" fit pans.

• Is the Lennox 17D78 compatible with horizontal air handlers? No, this is a vertical drain pan designed strictly for vertical up-flow or down-flow configurations to ensure proper drainage pitch.
• Does this include the primary drain line fittings? This unit is the pan assembly itself; always verify your existing NPT drain fittings are clear of debris or replace them during installation to ensure a complete seal.
• Can I use this pan for other furnace brands? This Lennox 17D78 is an OEM part designed for specific furnace and air handler cabinets; check your service manual to confirm the specific HVAC replacement part number for your model.

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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.