the 19550 is the direct replacement and functionally identical to the 3ARR3MARS550

High-Temperature Durability: Constructed with premium materials to resist warping and degradation in high-intensity combustion zones

offering the same tamper-proof factory calibration and durable open construction required for professional-grade maintenance and repair

this specific kit is factory-configured for natural gas only

This rotary energy regulator provides a 15-Amp resistive load capacity at 200°F and maintains a 13-Amp rating up to a maximum ambient temperature of 257°F

Lennox 21N38 Tray 321894-709 the 19550 is the directFor 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