Lennox 21N38 Tray
For field technicians maintaining Lennox and Healthy Climate bypass or power humidifiers, the Lennox 21N38 Water Distribution Tray is a critical component for ensuring metered, even saturation of the evaporative media. Over time, high mineral content in the water supply leads to scale buildup within the humidifier water distribution tray, which disrupts the gravity-fed capillary action and causes dry spots on the replacement humidifier pad. This genuine Lennox OEM part (also referenced as 21N3801 or AprilAire 4246) is precision-engineered to seat securely atop the 4236 pad holder, providing a uniform flow across the entire surface area of the Healthy Climate humidifier tray. Replacing a fouled or cracked tray is essential to prevent internal bypass air from carrying moisture unevenly, which can lead to premature evaporator pad degradation and potential humidifier leaking from the scale control insert. Designed for high-performance residential and light commercial whole-house humidifier systems, this tray maintains the specific flow rate required to meet the unit's rated GPD output.
Key Benefits for Contractors:- Precise Water Metering: Engineering-grade molded plastic features 6 calibrated ports to ensure even distribution across the humidifier water panel, maximizing evaporation efficiency.
- Direct OEM Compatibility: This is an exact drop-in replacement for Lennox 21N38, Armstrong 21N3801, and Healthy Climate models, eliminating the fitment issues common with universal aftermarket parts.
- System Protection: A clean water distribution tray prevents the overflow and "splatter" issues that often cause corrosion within the furnace plenum or air handler cabinet.
- Ease of Service: Designed to snap directly into the scale control insert and pad holder, allowing for rapid internal component swaps during annual maintenance visits.
Why is my humidifier leaking from the top of the tray?
Bypass humidifiers often leak if the 21N38 tray is leveled improperly or if mineral deposits have blocked the distribution notches. If cleaning the tray with a descaling solution does not restore uniform flow, the tray should be replaced to avoid water damage to the HVAC system.
Which models are compatible with this tray?
The Lennox 21N38 fits a wide range of units including Lennox WB2-17, WB2-17A, WP2-18, HCWP3-18, and AprilAire 700 series. Always check the part number against your specific Lennox humidifier model before installation.
Can I use this tray without the pad holder?
No. This tray is technically designed to interface specifically with the 4236 pad holder and scale control insert to maintain the structural integrity of the evaporative assembly.
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: $28.65
-65%$28.65
$10.03Lennox 21N38 Tray
For field technicians maintaining Lennox and Healthy Climate bypass or power humidifiers, the Lennox 21N38 Water Distribution Tray is a critical component for ensuring metered, even saturation of the evaporative media. Over time, high mineral content in the water supply leads to scale buildup within the humidifier water distribution tray, which disrupts the gravity-fed capillary action and causes dry spots on the replacement humidifier pad. This genuine Lennox OEM part (also referenced as 21N3801 or AprilAire 4246) is precision-engineered to seat securely atop the 4236 pad holder, providing a uniform flow across the entire surface area of the Healthy Climate humidifier tray. Replacing a fouled or cracked tray is essential to prevent internal bypass air from carrying moisture unevenly, which can lead to premature evaporator pad degradation and potential humidifier leaking from the scale control insert. Designed for high-performance residential and light commercial whole-house humidifier systems, this tray maintains the specific flow rate required to meet the unit's rated GPD output.
Key Benefits for Contractors:- Precise Water Metering: Engineering-grade molded plastic features 6 calibrated ports to ensure even distribution across the humidifier water panel, maximizing evaporation efficiency.
- Direct OEM Compatibility: This is an exact drop-in replacement for Lennox 21N38, Armstrong 21N3801, and Healthy Climate models, eliminating the fitment issues common with universal aftermarket parts.
- System Protection: A clean water distribution tray prevents the overflow and "splatter" issues that often cause corrosion within the furnace plenum or air handler cabinet.
- Ease of Service: Designed to snap directly into the scale control insert and pad holder, allowing for rapid internal component swaps during annual maintenance visits.
Why is my humidifier leaking from the top of the tray?
Bypass humidifiers often leak if the 21N38 tray is leveled improperly or if mineral deposits have blocked the distribution notches. If cleaning the tray with a descaling solution does not restore uniform flow, the tray should be replaced to avoid water damage to the HVAC system.
Which models are compatible with this tray?
The Lennox 21N38 fits a wide range of units including Lennox WB2-17, WB2-17A, WP2-18, HCWP3-18, and AprilAire 700 series. Always check the part number against your specific Lennox humidifier model before installation.
Can I use this tray without the pad holder?
No. This tray is technically designed to interface specifically with the 4236 pad holder and scale control insert to maintain the structural integrity of the evaporative assembly.
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.
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Description
For field technicians maintaining Lennox and Healthy Climate bypass or power humidifiers, the Lennox 21N38 Water Distribution Tray is a critical component for ensuring metered, even saturation of the evaporative media. Over time, high mineral content in the water supply leads to scale buildup within the humidifier water distribution tray, which disrupts the gravity-fed capillary action and causes dry spots on the replacement humidifier pad. This genuine Lennox OEM part (also referenced as 21N3801 or AprilAire 4246) is precision-engineered to seat securely atop the 4236 pad holder, providing a uniform flow across the entire surface area of the Healthy Climate humidifier tray. Replacing a fouled or cracked tray is essential to prevent internal bypass air from carrying moisture unevenly, which can lead to premature evaporator pad degradation and potential humidifier leaking from the scale control insert. Designed for high-performance residential and light commercial whole-house humidifier systems, this tray maintains the specific flow rate required to meet the unit's rated GPD output.
Key Benefits for Contractors:- Precise Water Metering: Engineering-grade molded plastic features 6 calibrated ports to ensure even distribution across the humidifier water panel, maximizing evaporation efficiency.
- Direct OEM Compatibility: This is an exact drop-in replacement for Lennox 21N38, Armstrong 21N3801, and Healthy Climate models, eliminating the fitment issues common with universal aftermarket parts.
- System Protection: A clean water distribution tray prevents the overflow and "splatter" issues that often cause corrosion within the furnace plenum or air handler cabinet.
- Ease of Service: Designed to snap directly into the scale control insert and pad holder, allowing for rapid internal component swaps during annual maintenance visits.
Why is my humidifier leaking from the top of the tray?
Bypass humidifiers often leak if the 21N38 tray is leveled improperly or if mineral deposits have blocked the distribution notches. If cleaning the tray with a descaling solution does not restore uniform flow, the tray should be replaced to avoid water damage to the HVAC system.
Which models are compatible with this tray?
The Lennox 21N38 fits a wide range of units including Lennox WB2-17, WB2-17A, WP2-18, HCWP3-18, and AprilAire 700 series. Always check the part number against your specific Lennox humidifier model before installation.
Can I use this tray without the pad holder?
No. This tray is technically designed to interface specifically with the 4236 pad holder and scale control insert to maintain the structural integrity of the evaporative assembly.
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.
