Up to 95% AFUE;45,000-72,000 BTUH input;In-shot burners, inducer location, and use of insulation ensure quiet operation;Hot-surface igniter eliminates the need for a constant flame;60-second fixed cooling cycle blower-off delay (TDR) increases cooling performance;Low-voltage terminal board allows easy field wiring;Appliance-quality door protects against rust and corrosion;Sealed combustion Category IV venting system allows for vertical or horizontal installation;Color-coded wire harness for easy servicing;Diagnostic lights simplify troubleshooting with easy fault code recognition;Smartlite technology extends the igniter lifespan;Dual-fuel compatibility;Heavy-gauge, steel tubular and secondary heat exchangers ensure long-lasting performance;30-second post purge clears combustion gasses in chamber, preventing backdraft fumes;30-second blower delay (FDR) saves energy and improves cooling efficiency;3-amp fuse protection against low-voltage shorts