MRCOOL Signature 80% AFUE, 70K BTU, 3 Ton, UpflowithHorizontal 5-Speed Gas Furnace - 17.5-Inch Cabinet (MGM80SE070B3A)

MRCOOL Signature 80% AFUE, 70K BTU, 3 Ton, UpflowithHorizontal 5-Speed Gas Furnace - 17.5-Inch Cabinet (MGM80SE070B3A)

80% AFUE 3 Ton 70,000 BTU Upflow/Horizontal 5-Speed Gas Furnace

When harsh winter weather strikes, nothing compares to the warmth and safety a powerful reliable gas furnace can provide. While furnace heating technology has been around for decades, not all systems are created equally. Some are definitely better than others. One of the best on the market is the MRCOOL single stage, 80% AFUE gas furnace.

This system can be installed upflow or horizontal, and is designed to operate for decades, provide powerful heating capability, and best of all, keep your heating bill affordable at the same time. It does the latter via its 80% AFUE energy efficiency rating. That mark of quality ensures 80% of every dollar you spend on heating fuel gets turned into real, effective heat for your home.

Features

• Removable floor base for bottom return air
• Easily removable slide out blower design
• Left or right utility connections
• Zero step horizontal conversion
• Aluminized steel inshot burners for smooth ignition
• Multi-speed high efficiency (constant torque) blower motor
• AHRI Certified
• Aluminized steel tapered crimped non-welded clam shell heat exchanger design
• Heating efficiency of 80% AFUE
• Registered 10-year parts warranty
• Compact 33" height
• Rotatable draft inducer for venting flexibility

Specifications

Video

What our Experts Think

• Reliable Heating Power – 70,000 BTU output provides dependable comfort for medium-sized homes.

• Energy Efficiency – 80% AFUE rating balances performance and affordability, reducing wasted fuel.

• Versatile Installation – Upflow/horizontal configuration adapts easily to different ductwork layouts.

• Multi-Speed Blower – 5-speed motor optimizes airflow for improved comfort and efficiency.

• Compact Cabinet – Slim 17.5-inch design is perfect for space-constrained installations.

• Durable Build – MRCOOL engineering ensures long-lasting performance with low maintenance needs.

Q&A

Q: What is the heating capacity of this furnace?
A: The MRCOOL MGM80SE070B3A delivers 70,000 BTU of heating power, suitable for small to medium homes.

Q: What is its efficiency rating?
A: It operates at 80% AFUE, meaning it converts 80% of the fuel into usable heat.

Q: What airflow configurations are supported?
A: This furnace supports upflow and horizontal installations, giving flexibility for different layouts.

Q: How many tons of cooling is it compatible with?
A: It is designed to work with up to a 3-ton A/C system.

Q: What type of blower motor does it have?
A: It features a 5-speed blower motor for consistent airflow and comfort control.

Q: What is the cabinet size?
A: The furnace comes in a 17.5-inch cabinet, compact for easy installation in tight spaces.

Maintenance Tips

• Replace or clean air filters every 1–2 months to maintain airflow.

• Inspect burners and flame sensor for proper operation.

• Keep vents and surrounding area free of dust and obstructions.

• Check condensate drain and hoses for clogs or leaks.

• Test thermostat settings and blower function regularly.

• Schedule annual professional servicing for safe, efficient heating.