3-5 Ton Oil Furnace, Single Stage, Front Flue Up/Lo-Boy, Variable Speed, 124,000 to 141,000 BTU

Armstrong Air 1.211102 – High-Capacity Oil Furnace, 85% AFUE, Variable Speed

The Armstrong Air 1.211102 is a high-output oil-fired furnace engineered for consistent performance in residential applications requiring heating capacities between 124,000 and 141,000 BTU/hr. Designed for upflow configuration, this model features an 85% AFUE efficiency rating and a variable speed ECM blower motor, providing enhanced airflow control and system compatibility with advanced filtration or zoning systems.

Its 22.5-inch cabinet width allows for installation in narrower utility spaces while still supporting large airflow volumes. The unit is constructed with a heavy-duty heat exchanger and durable components built to handle the demands of long-term operation in colder climates. With a flue outlet sized at 6 inches in diameter, the unit supports standard venting configurations.

Performance Features

• AFUE Rating: 85% – Optimized for oil heat applications requiring high efficiency without condensing technology.
• Heating Output: 124,000 to 141,000 BTU/hr – Sized for larger residential zones or high-demand heating applications.
• Blower Motor: Variable speed ECM – Supports quiet operation, comfort modulation, and efficient airflow.
• Compact Width: 22.5 in – Fits tight equipment closets or mechanical rooms.
• Flue Outlet: 6 in round – Standard venting connection for oil furnaces.

Technical Specifications

• Model: 1.211102
• Fuel Type: Oil
• AFUE: 85%
• Input Range: 124,000 – 141,000 BTU/hr
• Blower Type: Variable Speed ECM
• Dimensions: 37 in H × 22.5 in W × 52 in D
• Flue Connection: 6 in dia.

Installation Requirements

This oil-fired unit must be installed by a licensed HVAC technician familiar with fuel oil system requirements, combustion setup, and airflow calibration. Proper nozzle selection, burner adjustment, and draft settings are critical to achieving optimal combustion efficiency and safe operation. Installations must comply with local mechanical codes and national oil heating standards.