The MRCOOL Signature Series Single-Stage 96% AFUE 45k BTU gas furnace is a quiet-running, low NOx, and energy efficient unit that provides superior warmth during the harshest winter weather. With a 96% AFUE, the furnace features a multi-speed high efficiency blower motor and offers enhanced cooling SEER ratings when applied with properly matched cooling equipment. It features a durable build and finish with an aluminized steel primary heat exchanger with crimped non-welded construction. The aluminized steel inshot burners provide smooth ignition with a durable silicon nitride ignitor. Thanks to the single-stage gas valve, you can expect your home to be heated quickly. With a compact 33-inch design, a left or right utility connection, and a zero-step horizontal conversion, installation is easy and time-saving. It also features standardized widths for easy coil fit, a removable floor base for bottom return air, and can be easily vented with PVC pipe. The furnace is design certified for direct and non-direct applications, and an optional LP kit is available to easily convert the unit to a liquid propane configuration. Maintenance of the unit is easy thanks to the easily removable slide out blower design. MRCOOL proudly offers a 10-year parts warranty and a lifetime heat exchanger warranty to provide peace of mind.