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The Rheem R801T1005A21UHSNAS from the Endeavor Classic Series is a high‑capacity, standard‑efficiency natural gas furnace engineered for dependable heating, smooth airflow, and long‑term durability. Delivering 100,000 BTU of heating output with an 80% AFUE rating, this natural gas furnace is an excellent choice for mid‑sized to larger homes seeking reliable, affordable comfort. Its 1‑stage gas valve provides straightforward, consistent heating, while the ECM multi‑speed blower enhances airflow efficiency and pairs seamlessly with 5‑ton cooling systems. The wider upflow/horizontal C‑cabinet design supports higher airflow demands and offers flexible installation in basements, closets, attics, and mechanical rooms.
Cabinet Dimensions
Height: 34 in
Width: 21 in
Depth: 28.75 in
Key Features
100,000 BTU Heating Output – Strong, reliable heat for larger 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 – Ideal match for 5‑ton AC or heat pump systems.
Upflow/Horizontal “C” Cabinet – Wider footprint for flexible installation across various mechanical spaces.
Sealed, Insulated Cabinet – Reduces heat loss and minimizes operating noise.
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Endeavor Classic Build Quality – Engineered for reliability, durability, and long service life.
We service and install all types of HVAC heating and cooling equipment throughout Long Island, including (but not limited to) this coverage area:
Nassau County: Oyster Bay, Hempstead, North Hempstead, Glen Cove, Long Beach, Freeport, Valley Stream, Garden City, Great Neck, Mineola, Hicksville, Levittown, Massapequa, Bethpage, Plainview, Syosset, Jericho, Westbury, Rockville Centre, Farmingdale
Suffolk County: Huntington, Babylon, Islip, Smithtown, Brookhaven, Riverhead, Shelter Island, Southold, Southampton, East Hampton, Commack, Deer Park, Lindenhurst, Bay Shore, Brentwood, Central Islip, Hauppauge, Centereach, Selden, Medford, Patchogue, Shirley
Contact us today at (631) 779-3196
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