Skip to Product Info
    • MRCOOL 80% AFUE 3 Ton 45,000 BTU Upflow/Horizontal 5-Speed Gas Furnace | MGM80SE045A3A
    • MRCOOL 80% AFUE 3 Ton 45,000 BTU Upflow/Horizontal 5-Speed Gas Furnace | MGM80SE045A3A
    • MRCOOL 80% AFUE 3 Ton 45,000 BTU Upflow/Horizontal 5-Speed Gas Furnace | MGM80SE045A3A
    • MRCOOL 80% AFUE 3 Ton 45,000 BTU Upflow/Horizontal 5-Speed Gas Furnace | MGM80SE045A3A
    • MRCOOL 80% AFUE 3 Ton 45,000 BTU Upflow/Horizontal 5-Speed Gas Furnace | MGM80SE045A3A
    • MRCOOL 80% AFUE 3 Ton 45,000 BTU Upflow/Horizontal 5-Speed Gas Furnace | MGM80SE045A3A
    • MRCOOL 80% AFUE 3 Ton 45,000 BTU Upflow/Horizontal 5-Speed Gas Furnace | MGM80SE045A3A

    MRCOOL 80% AFUE 3 Ton 45,000 BTU Upflow/Horizontal 5-Speed Gas Furnace | MGM80SE045A3A

    20% Off
    Sale Price $1,203.00 Regular Price $1,503.75

    Out of Stock

    Payment & Security

    Your payment is secure. We don’t store or see your card details.

    • American Express
    • Apple Pay
    • Diners Club
    • Discover
    • Google Pay
    • Mastercard
    • PayPal
    • Shop Pay
    • Visa
    Pairs well with

    Reliable Warmth. Efficient Comfort. Trusted MRCOOL Performance.

    Keep your home cozy during the coldest months with the MRCOOL 80% AFUE 3 Ton Gas Furnace (Model: MGM80SE045A3A). Designed for upflow or horizontal installation, this single-stage gas furnace offers consistent heating with an energy-efficient 80% AFUE rating—meaning 80 cents of every dollar spent on fuel is converted into heat.

    Ideal for homeowners looking for reliable performance and easy maintenance, this furnace features a multi-speed ECM blower motor, a slide-out blower assembly, and rotatable draft inducer for flexible venting.

    ⚠️ Note: Not available for sale or installation in California due to state energy regulations.


    🔧 Key Features:

    • 80% AFUE Efficiency
      Converts 80% of fuel into heat to maximize comfort and energy savings.

    • 3 Ton / 45,000 BTU Heating Capacity
      Ideal for medium to larger homes or zones needing dependable, even heat distribution.

    • Upflow/Horizontal Installation
      Versatile configuration with removable floor base for bottom return applications.

    • Quiet, Consistent Comfort
      High-efficiency 5-speed ECM blower motor ensures even airflow and whisper-quiet operation.

    • Durable Internal Components
      Includes aluminized steel inshot burners and a non-welded clamshell heat exchanger for long-lasting performance.

    • Maintenance-Friendly Design
      Easy-access slide-out blower simplifies cleaning and servicing.

    • Flexible Connections
      Left or right utility hookups plus rotatable draft inducer for adaptable venting.

    • Certified for Safety and Efficiency
      AHRI and CSA certified, ensuring dependable operation that meets national standards.

    • Warranty Protection
      Comes with a 10-year parts warranty when registered and installed by a licensed professional.


    🧰 Technical Specifications:

    • Model: MGM80SE045A3A

    • AFUE Rating: 80%

    • BTU Input: 44,000 | BTU Output: 35,200

    • CFM: 1230

    • Tonnage: 3 Ton

    • Blower Motor Type: ECM, 5-Speed

    • Electrical: 120V, 60Hz, Single Phase, 15A Max

    • Gas Type: Natural Gas (LP kit available)

    • Ignition: Silicon Nitride Ignitor

    • Heat Exchanger: Tapered, Non-Welded Clamshell – Aluminized Steel

    • Vent Connector: 4"

    • Dimensions: 14.5"W x 28.375"D x 33"H

    • Weight: 111 lbs

    • Restricted States: Not for sale in California

    PRODUCT SPECIFICATIONS:

    Product Dimensions 14 1/2'W x 28 3/8'D x 33'H
    Product Weight 111 lbs
    Unit Type Gas Furnace
    AFUE 80%
    CFM 1230
    Tonnage 3
    Heating Capacity 44,000 BTU
    Fuel Type Natural Gas
    BTU Input 44,000
    BTU Output 35,200
    Voltage Requires a minimum of 120V/60HZ/15A
    Phase 1
    Cycle 60
    Stage Single
    Max Fuse Breaker 15
    Min Circuit Ampacity 6.8
    Color Gray
    Full Load 6.8
    Number of Burners 4
    Gas Connection Size 0.5
    Blower Motor Type ECM
    Blower Motor HP 1/2
    Blower Motor Speeds 5 Speed
    Blower Motor RPM 535-1230
    Heat Exchanger Type Aluminized steel
    Ignition Type Silicon Nitride Ignitor
    Vent Connector 4 inch
    LP Kit Available Yes
    Certifications CSA
    AHRI
    Warranty Registered 10 Year Parts Warranty
    Restricted States Yes (California)

     

    Product Specifications
    Oops, no results found~
    Service & Support

    Manufacturer Warranty

    This product is covered by the manufacturer’s warranty against defects in materials and workmanship when installed and used according to the manufacturer’s guidelines. Warranty terms and coverage periods vary by manufacturer and product type. Please refer to the official product documentation or contact our team if you need help verifying warranty details.

    Technical Support

    Freedom HVAC Supply is staffed by people who actually understand HVAC systems. If you need help confirming compatibility, selecting the correct replacement part, or understanding installation requirements, our team is available to assist before and after your purchase.

    Product Documentation

    Installation manuals, specification sheets, wiring diagrams, and other technical documentation are available whenever possible. These resources help ensure proper installation, system compatibility, and safe operation of your equipment.

    Parts Compatibility & Cross-Reference

    Many HVAC parts replace or supersede older manufacturer part numbers. We provide replacement part numbers and compatible model information on product pages to help technicians and homeowners verify the correct component before ordering.

    Replacement Parts & Accessories

    Freedom HVAC Supply carries genuine replacement components and compatible accessories to keep HVAC systems running reliably. From control boards and motors to sensors, line sets, and installation accessories, we supply the parts professionals depend on.

    Customer Support

    If you have questions about product compatibility, warranty coverage, or installation considerations, our support team is ready to help. Our goal is to make sure you get the right part the first time so your system can get back up and running quickly.

    FAQs About Our HVAC Products

    Quick answers to questions about ordering, compatibility, and installation.

    Ordering & Compatibility

    1. Do you sell HVAC equipment to homeowners and DIY installers?

    Yes. Freedom HVAC Supply sells HVAC equipment and parts to contractors, property owners, and qualified DIY installers. Some products may require professional installation based on local codes.

    2. How do I know if this HVAC product is compatible with my system?

    Product pages include specifications and compatibility details. If you’re unsure, our team can help verify fit before you order.

    3. Can HVAC contractors purchase from Freedom HVAC Supply?

    Absolutely. We work with licensed HVAC contractors, installers, and professionals nationwide.

    Installation & Support

    1. Do HVAC systems require professional installation?

    Some HVAC equipment must be installed by a licensed professional to meet code requirements or warranty terms. Always review manufacturer guidelines.

    2. Can you help me choose the right HVAC system or part?

    Yes. Our support team can assist with product selection based on your application, space, and installation needs.

    3. Do you provide installation manuals or documentation?

    Manufacturer installation guides and documentation are included or available upon request for most products.

    Warranty & Shipping

    1. Do HVAC products include a manufacturer warranty?

    Most HVAC equipment includes a manufacturer warranty when installed according to guidelines. Warranty terms vary by brand and product.

    2. Do you ship HVAC equipment nationwide?

    Yes. We ship HVAC systems and parts throughout the continental United States using trusted freight and parcel carriers.

    3. What should I know about freight delivery for HVAC equipment?

    Larger HVAC equipment ships via freight and should be inspected upon delivery. Delivery details are provided during checkout.

    Need HVAC Help?

    Get help with ordering, compatibility, or installation questions.

    Recently viewed

    Last seen items