
Lennox 12W78 Drain Pan
The Lennox 12W78 is a heavy-duty vertical drain pan engineered for superior condensate management in high-efficiency upflow configurations. This genuine OEM replacement part is specifically designed to fit 12-inch and 15-inch diameter Lennox commercial air handlers and select residential condensing units. Built from non-corrosive, high-impact materials, the 12W78 prevents moisture accumulation that can lead to structural damage or secondary heat exchanger failure. With precise dimensions of 19.52" x 20" x 2.06", it provides a drop-in fit for rapid field installation, reducing downtime during critical maintenance cycles. The Lennox 12W78 condensate pan features a built-in drain connection to ensure a reliable seal, maintaining system integrity and supporting optimal indoor air quality by preventing stagnant water. Whether you are servicing a Lennox air handler or a condensing gas furnace, this HVAC drain pan is the technician's choice for long-term reliability in high-use environments.
Key Benefits
- OEM Compatibility: Precision-engineered for a seamless fit in Lennox CBX25, CBX26, and BCS3M series units, ensuring no-leak performance.
- Non-Corrosive Construction: High-impact molded design resists rust and chemical degradation caused by acidic condensate.
- Efficient Drainage: Optimized vertical orientation allows for effective water channeling in tight cabinet clearances.
- Equipment Protection: Safeguards sensitive internal components and flooring from water damage and moisture-related corrosion.
Common Questions
Is the 12W78 compatible with my specific Lennox model?
This pan is a standard replacement for 12" Category 21 units. To verify fitment for specific serial ranges, such as the 12B, 16B, or 19B air handler series, cross-referencing your unit's model number is recommended.
What are the exact dimensions for clearance?
The pan measures approximately 19.52 inches by 20 inches with a 2.06-inch depth, specifically designed for upflow applications where space is at a premium.
Can this pan be used in horizontal applications?
The 12W78 is specifically designed as a vertical drain pan for upflow models. Using it in a horizontal configuration may result in improper drainage and potential leaks.
This item is not eligible for free shipping.
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.
Original: $381.05
-65%$381.05
$133.37Lennox 12W78 Drain Pan
The Lennox 12W78 is a heavy-duty vertical drain pan engineered for superior condensate management in high-efficiency upflow configurations. This genuine OEM replacement part is specifically designed to fit 12-inch and 15-inch diameter Lennox commercial air handlers and select residential condensing units. Built from non-corrosive, high-impact materials, the 12W78 prevents moisture accumulation that can lead to structural damage or secondary heat exchanger failure. With precise dimensions of 19.52" x 20" x 2.06", it provides a drop-in fit for rapid field installation, reducing downtime during critical maintenance cycles. The Lennox 12W78 condensate pan features a built-in drain connection to ensure a reliable seal, maintaining system integrity and supporting optimal indoor air quality by preventing stagnant water. Whether you are servicing a Lennox air handler or a condensing gas furnace, this HVAC drain pan is the technician's choice for long-term reliability in high-use environments.
Key Benefits
- OEM Compatibility: Precision-engineered for a seamless fit in Lennox CBX25, CBX26, and BCS3M series units, ensuring no-leak performance.
- Non-Corrosive Construction: High-impact molded design resists rust and chemical degradation caused by acidic condensate.
- Efficient Drainage: Optimized vertical orientation allows for effective water channeling in tight cabinet clearances.
- Equipment Protection: Safeguards sensitive internal components and flooring from water damage and moisture-related corrosion.
Common Questions
Is the 12W78 compatible with my specific Lennox model?
This pan is a standard replacement for 12" Category 21 units. To verify fitment for specific serial ranges, such as the 12B, 16B, or 19B air handler series, cross-referencing your unit's model number is recommended.
What are the exact dimensions for clearance?
The pan measures approximately 19.52 inches by 20 inches with a 2.06-inch depth, specifically designed for upflow applications where space is at a premium.
Can this pan be used in horizontal applications?
The 12W78 is specifically designed as a vertical drain pan for upflow models. Using it in a horizontal configuration may result in improper drainage and potential leaks.
This item is not eligible for free shipping.
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.
Product Information
Product Information
Shipping & Returns
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Description
The Lennox 12W78 is a heavy-duty vertical drain pan engineered for superior condensate management in high-efficiency upflow configurations. This genuine OEM replacement part is specifically designed to fit 12-inch and 15-inch diameter Lennox commercial air handlers and select residential condensing units. Built from non-corrosive, high-impact materials, the 12W78 prevents moisture accumulation that can lead to structural damage or secondary heat exchanger failure. With precise dimensions of 19.52" x 20" x 2.06", it provides a drop-in fit for rapid field installation, reducing downtime during critical maintenance cycles. The Lennox 12W78 condensate pan features a built-in drain connection to ensure a reliable seal, maintaining system integrity and supporting optimal indoor air quality by preventing stagnant water. Whether you are servicing a Lennox air handler or a condensing gas furnace, this HVAC drain pan is the technician's choice for long-term reliability in high-use environments.
Key Benefits
- OEM Compatibility: Precision-engineered for a seamless fit in Lennox CBX25, CBX26, and BCS3M series units, ensuring no-leak performance.
- Non-Corrosive Construction: High-impact molded design resists rust and chemical degradation caused by acidic condensate.
- Efficient Drainage: Optimized vertical orientation allows for effective water channeling in tight cabinet clearances.
- Equipment Protection: Safeguards sensitive internal components and flooring from water damage and moisture-related corrosion.
Common Questions
Is the 12W78 compatible with my specific Lennox model?
This pan is a standard replacement for 12" Category 21 units. To verify fitment for specific serial ranges, such as the 12B, 16B, or 19B air handler series, cross-referencing your unit's model number is recommended.
What are the exact dimensions for clearance?
The pan measures approximately 19.52 inches by 20 inches with a 2.06-inch depth, specifically designed for upflow applications where space is at a premium.
Can this pan be used in horizontal applications?
The 12W78 is specifically designed as a vertical drain pan for upflow models. Using it in a horizontal configuration may result in improper drainage and potential leaks.
This item is not eligible for free shipping.
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.












