Armstrong Air Furnaces
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Armstrong manufactures both oil and gas burning furnaces ranging from 80 to 97 percent AFUE. Units are available in upflow/horizontal and downflow configurations and feature a compact, 33-inch design for easy installation and maintenance.
Multi-Stage Performance and Variable-Speed Blowers
Armstrong's line of multi-stage furnaces with variable-speed blowers feature AFUE ratings ranging from 80 to 97 percent. The highest efficiency units feature modulating heat, while the remaining units have two-stage heating.
All models in this series are equipped with a stainless steel or aluminized steel heat exchanger and Armstrong's Quiet Combustion Technology, which uses a smaller Btu input for each burner to keep startup and operation noise to a minimum. Several of the models in this series are Energy Star-certified.
Single-Stage Performance with Constant Torque Motors
Armstrong manufactures two models of single-stage performance furnaces with a constant torque motor. Designed to provide consistent airflow and quiet operation, the constant torque motor helps increase overall system efficiency compared to other styles, according to the manufacturer.
Models are available with 80 or 95 percent AFUE. They feature Quiet Combustion Technology, an aluminized steel or stainless steel heat exchanger, and Armstrong's EHX Technology designed to eliminate hot spots and increase the unit's lifespan.
Although Armstrong's line of single-stage performance furnaces lack the special features of the manufacturer's top-tier product lines, these models do offer equally efficient heating. With four models available, single-stage performance furnaces range from 80 to 95 percent AFUE.
Quiet startup and low operation noise, EHX Technology, and an internal monitoring system to prevent system malfunctions are among the features of this series.
Armstrong offers variable-speed blowers and single-stage performance from its oil furnaces. All units offer feature an 83-percent AFUE rating. These models use Beckett Burners and an insulated cabinet that keeps the warm air in and noise levels low.
Care and Maintenance
Armstrong advises annual maintenance from a service technician prior to the start of the heating season. Most manufacturers encourage homeowners to clean their filters regularly for maximum furnace performance.
Every Armstrong furnace comes with a limited lifetime warranty for the heat exchanger and a 10-year limited warranty on parts, so long as the product is properly registered shortly after installation. The manufacturer's warranty begins on the date of installation.