Transitioning to eco-friendly, low-GWP cooling systems requires next-generation indoor equipment designed for safety and efficiency. The Navien NASS59D2T2A1 is a premium 5-ton multi-position air handler explicitly engineered to operate with modern R454B refrigerant. Featuring a versatile chassis, this single SKU easily supports upflow, horizontal, and downflow configurations, adapting seamlessly to a wide range of residential mechanical closets or basement layouts.
At the heart of this air handler is a high-efficiency NASS constant torque ECM blower motor, which optimizes airflow delivery while reducing energy consumption. The unit features a durable, corrosion-resistant all-aluminum DX refrigerant coil equipped with a factory-installed thermostatic expansion valve for precise cooling performance. For advanced safety and compliance, it incorporates a factory-mounted A2L refrigerant leak detection sensor and built-in mitigation controls.
Built for long-term reliability, the cabinet houses heat-resistant polymer drain pans and a slide-out blower assembly that simplifies routine maintenance or electrical service. This 24-1/2 inch wide air handler is AHRI-matched to interface seamlessly with high-efficiency Navien heat pumps or air conditioners. Please consult with a certified professional to verify electrical subpanels and duct configurations prior to installation.
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