Gas Furnace Infinity 80% AFUE 70000 BTU Two-Stage Multi-position 17.5-Inch-Wide Cabinet

The Gas Furnace Infinity 80% AFUE 70000 BTU Two-Stage Multi-position (58TN0B070C17--16) offers a nominal 70,000 BTU input with 80% AFUE efficiency in a flexible up-flow, down-flow or horizontal 4-way multipoise cabinet. The 17.5 wide cabinet (17.5 actual) allows installation in confined mechanical spaces while still providing full service access. Its two-stage gas valve paired with a variable-speed constant-airflow ECM blower motor delivers smoother transitions between heat stages, quieter low-stage operation and enhanced indoor comfort and humidity control. Operating on 115 V single-phase power, the unit's maximum unit amps is approximately 10.5 A and unit ampacity about 13.8 A with a recommended 15 A fuse or breaker, and the gas connection is ½ NPT (natural gas factory, convertible to propane). Certified temperature-rise range is 30-60 °F and the unit supports up to 13 venting configurations with a height of approximately 33 1/3, making this furnace technician-friendly and well-suited for high-quality residential heating systems.