40,000 BTU 80% AFUE Gas Furnace Ameristar by American Standard A801X040AM3SD Multi-Position 14.5″

Description

The Ameristar by American Standard A801X040AM3SD Gas Furnace is a compact and efficient heating solution designed for smaller residential applications and system replacements.

With 40,000 BTU input and 80% AFUE efficiency, this unit delivers consistent heating performance while maintaining cost-effective operation. It is ideal for homes or spaces that require lower heating output without sacrificing reliability.

This furnace features a single-stage gas burner paired with a constant torque ECM blower motor, providing steady airflow, improved comfort, and enhanced efficiency compared to traditional systems.

The multi-position design (upflow, downflow, horizontal) allows for flexible installation across a wide range of setups, making it a practical choice for contractors working in tight or varied spaces.

Built with durable components and backed by the reliability of American Standard manufacturing, the Ameristar line offers dependable performance at a competitive price point.

Key Features

• 40,000 BTU heating capacity

• 80% AFUE efficiency

• Single-stage gas furnace

• Constant torque ECM blower motor

• Multi-position installation: upflow, downflow, horizontal

• Compact 14.5″ cabinet width

• Natural gas (field convertible to propane)

• Designed for residential applications