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The Rheem R801T1255A24UHSNAS from the Endeavor Classic Series is a high‑capacity, standard‑efficiency natural gas furnace engineered for strong heating performance, smooth airflow, and long‑term reliability. Delivering 125,000 BTU of heating output with an 80% AFUE rating, this natural gas furnace is ideal for larger homes or light commercial applications requiring dependable, consistent heat. Its 1‑stage gas valve provides straightforward, reliable operation, while the ECM multi‑speed blower enhances airflow efficiency and pairs seamlessly with 5‑ton cooling systems. The larger upflow/horizontal D‑cabinet design supports high airflow demands and offers installation flexibility across basements, attics, closets, and mechanical rooms.
Cabinet Dimensions
Height: 34 in
Width: 24.5 in
Depth: 28.75 in
Key Features
125,000 BTU Heating Output – Powerful, reliable heat for large homes or demanding applications.
80% AFUE Efficiency – Standard‑efficiency performance with a lower upfront cost.
1‑Stage Gas Valve – Simple, dependable heating with consistent comfort.
ECM Multi‑Speed Blower – Efficient airflow, quieter operation, and improved comfort.
5‑Ton Airflow Capacity – Perfect match for 5‑ton AC or heat pump systems.
Upflow/Horizontal “D” Cabinet – Largest cabinet footprint for high‑capacity airflow and installation flexibility.
Sealed, Insulated Cabinet – Reduces heat loss and minimizes operating noise.
Endeavor Classic Build Quality – Engineered for reliability, durability, and long service life.
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