Rheem R801T1005A21DZNNAS 100,000 BTU 80% AFUE Gas Furnace, Downflow, 115V/1-Phase/60Hz
The Rheem R801T1005A21DZNNAS is a 100,000 BTU gas furnace rated at 80% AFUE, providing the heating stage of a residential split system and pairing with a matched coil and condenser or heat pump. It installs in a downflow orientation.
Key specifications include a heating output of 80,000 BTU, a 1/2" gas connection, 115V 1-Phase 60Hz power.
Confirm heating load, gas supply, venting, and airflow orientation against local code before ordering. Match to an AHRI-certified coil and condenser for system performance.
Specifications
| Heating Input (BTU) | 100000 |
| Heating Output (BTU) | 80000 |
| AFUE (%) | 80 |
| Furnace Type | Gas |
| Airflow Direction | Downflow |
| Voltage | 115 VAC |
| Phase | Single |
| Gas Connection | 1/2" |
| ENERGY STAR | No |
| Cabinet Color | Gray |
Why Rheem
Rheem covers residential condensing units and heat pumps with a 10-year conditional limited parts warranty when registered within 90 days and installed as an AHRI-matched system for the original owner (otherwise the standard parts period applies).
Product Information
Product Information
Shipping & Returns
Shipping & Returns

Rheem R801T1005A21DZNNAS 100,000 BTU 80% AFUE Gas Furnace, Downflow, 115V/1-Phase/60Hz
Rheem R801T1005A21DZNNAS 100,000 BTU 80% AFUE Gas Furnace, Downflow, 115V/1-Phase/60Hz
The Rheem R801T1005A21DZNNAS is a 100,000 BTU gas furnace rated at 80% AFUE, providing the heating stage of a residential split system and pairing with a matched coil and condenser or heat pump. It installs in a downflow orientation.
Key specifications include a heating output of 80,000 BTU, a 1/2" gas connection, 115V 1-Phase 60Hz power.
Confirm heating load, gas supply, venting, and airflow orientation against local code before ordering. Match to an AHRI-certified coil and condenser for system performance.
Specifications
| Heating Input (BTU) | 100000 |
| Heating Output (BTU) | 80000 |
| AFUE (%) | 80 |
| Furnace Type | Gas |
| Airflow Direction | Downflow |
| Voltage | 115 VAC |
| Phase | Single |
| Gas Connection | 1/2" |
| ENERGY STAR | No |
| Cabinet Color | Gray |
Why Rheem
Rheem covers residential condensing units and heat pumps with a 10-year conditional limited parts warranty when registered within 90 days and installed as an AHRI-matched system for the original owner (otherwise the standard parts period applies).
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Rheem R801T1005A21DZNNAS is a 100,000 BTU gas furnace rated at 80% AFUE, providing the heating stage of a residential split system and pairing with a matched coil and condenser or heat pump. It installs in a downflow orientation.
Key specifications include a heating output of 80,000 BTU, a 1/2" gas connection, 115V 1-Phase 60Hz power.
Confirm heating load, gas supply, venting, and airflow orientation against local code before ordering. Match to an AHRI-certified coil and condenser for system performance.
Specifications
| Heating Input (BTU) | 100000 |
| Heating Output (BTU) | 80000 |
| AFUE (%) | 80 |
| Furnace Type | Gas |
| Airflow Direction | Downflow |
| Voltage | 115 VAC |
| Phase | Single |
| Gas Connection | 1/2" |
| ENERGY STAR | No |
| Cabinet Color | Gray |
Why Rheem
Rheem covers residential condensing units and heat pumps with a 10-year conditional limited parts warranty when registered within 90 days and installed as an AHRI-matched system for the original owner (otherwise the standard parts period applies).












