ARMSTRONG AIR 23U35 44,000 BTU 96% AFUE Gas Furnace, Downflow, 120V/1-Phase/60Hz
The ARMSTRONG AIR 23U35 is a 44,000 BTU gas furnace rated at 96% 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 42,000 BTU, a 1/2" gas connection, 120V 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) | 44000 |
| Heating Output (BTU) | 42000 |
| AFUE (%) | 96 |
| Furnace Type | Gas |
| Airflow Direction | Downflow |
| Voltage | 120 VAC |
| Phase | Single |
| Gas Connection | 1/2" |
| ENERGY STAR | Yes |
| Cabinet Color | Gray |
| Certifications | AHRI Certified, CSA Design Certified |
Why ARMSTRONG AIR
ARMSTRONG AIR HVAC equipment. AHRI Certified, CSA Design Certified listed. See the model's warranty certificate for coverage terms.
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ARMSTRONG AIR 23U35 44,000 BTU 96% AFUE Gas Furnace, Downflow, 120V/1-Phase/60Hz
ARMSTRONG AIR 23U35 44,000 BTU 96% AFUE Gas Furnace, Downflow, 120V/1-Phase/60Hz
The ARMSTRONG AIR 23U35 is a 44,000 BTU gas furnace rated at 96% 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 42,000 BTU, a 1/2" gas connection, 120V 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) | 44000 |
| Heating Output (BTU) | 42000 |
| AFUE (%) | 96 |
| Furnace Type | Gas |
| Airflow Direction | Downflow |
| Voltage | 120 VAC |
| Phase | Single |
| Gas Connection | 1/2" |
| ENERGY STAR | Yes |
| Cabinet Color | Gray |
| Certifications | AHRI Certified, CSA Design Certified |
Why ARMSTRONG AIR
ARMSTRONG AIR HVAC equipment. AHRI Certified, CSA Design Certified listed. See the model's warranty certificate for coverage terms.
Original: $1,165.98
-65%$1,165.98
$408.09Product Information
Product Information
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Shipping & Returns
Description
The ARMSTRONG AIR 23U35 is a 44,000 BTU gas furnace rated at 96% 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 42,000 BTU, a 1/2" gas connection, 120V 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) | 44000 |
| Heating Output (BTU) | 42000 |
| AFUE (%) | 96 |
| Furnace Type | Gas |
| Airflow Direction | Downflow |
| Voltage | 120 VAC |
| Phase | Single |
| Gas Connection | 1/2" |
| ENERGY STAR | Yes |
| Cabinet Color | Gray |
| Certifications | AHRI Certified, CSA Design Certified |
Why ARMSTRONG AIR
ARMSTRONG AIR HVAC equipment. AHRI Certified, CSA Design Certified listed. See the model's warranty certificate for coverage terms.












