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    • MRCOOL DIY® 5th Gen E Star 12,000 BTU Single Zone Mini Split Air Handler 115V, DIY-12-HP-WMAH-115D25-O
    • MRCOOL DIY® 5th Gen E Star 12,000 BTU Single Zone Mini Split Air Handler 115V, DIY-12-HP-WMAH-115D25-O

    MRCOOL DIY® 5th Gen E Star 12,000 BTU Single Zone Mini Split Air Handler 115V, DIY-12-HP-WMAH-115D25-O

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    Sale Price $786.00 Regular Price $982.50

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    MRCOOL DIY® 5th Gen 12,000 BTU Single Zone Mini Split Air Handler – 115V (DIY-12-HP-WMAH-115D25-O)

    The MRCOOL DIY® 5th Gen 12K BTU Single Zone Mini Split Air Handler is designed for year-round heating and cooling, providing energy-efficient climate control for spaces 350 to 500 sq. ft.. This air handler pairs with the MRCOOL DIY® 5th Gen Condenser, delivering seamless operation, customizable comfort, and wireless control.

    With a simple DIY installation, this indoor unit is easy to set up with the pre-charged QuickConnect® line set (sold separately). Enjoy hands-free temperature control via the SmartHVAC app, Amazon Alexa, or Google Assistant, or use the included remote.

    📌 This listing includes only the indoor air handler. A compatible MRCOOL DIY® 5th Gen Condenser is required for full system operation.


    Key Features & Benefits:

    DIY Installation – No HVAC Technician Required

    • Works with pre-charged DIY® QuickConnect® line set (sold separately) for a vacuum-free installation.
    • No special tools or professional experience needed—perfect for DIYers.

    Powerful Heating & Cooling

    • 12,000 BTU capacity, ideal for 350-500 sq. ft. rooms.
    • Operates on 115V power supply.

    Smart Climate Control for Maximum Comfort

    • Adjust settings via SmartHVAC app (iOS & Android), remote, or voice commands with Amazon Alexa & Google Assistant.
    • Follow Me Function optimizes comfort by adjusting airflow based on the remote’s location.

    Dehumidification Mode for Improved Air Quality

    • Dry Mode reduces excess humidity, enhancing indoor air quality.

    DIYPRO® Cable – Enhanced Durability

    • Eliminates the need for electrical conduit, providing extra protection against outdoor elements and wildlife.

    Industry-Leading Warranty

    • Limited Lifetime Warranty on select components.
    • 7-Year Compressor Warranty and 5-Year Parts Warranty.

    Certified for Quality & Safety

    • Intertek listed (5031495) for compliance with performance, safety, and energy efficiency standards.

    Specifications:

    • Brand: MRCOOL DIY®
    • Model: DIY-12-HP-WMAH-115D25-O
    • Capacity: 12,000 BTU
    • Coverage Area: 350-500 sq. ft.
    • Power Supply: 115V
    • Compatible Line Set: DIY® QuickConnect® (sold separately)
    • Control Options: Remote, SmartHVAC App, Alexa, Google Assistant
    • Functions: Heating, Cooling, Dehumidification (Dry Mode), Follow Me Function
    • Certifications: Intertek Listed 5031495
    • Compressor Warranty: 7 Years
    • Parts Warranty: 5 Years

    Important Notes:

    📌 This listing includes only the indoor air handler. A compatible MRCOOL DIY® 5th Gen Condenser is required for full system operation.

    📌 Stock images may be used—actual product appearance may vary slightly.

    📌 Professional Installation Not Required – Designed for DIY installation, but must be paired with a compatible MRCOOL outdoor condenser for full operation.


    Need Help? Contact Us!

    If you have any questions about the MRCOOL DIY® 5th Gen 12K BTU Mini Split Air Handler, please call us to speak with a customer service representative. They will be happy to assist you!

    As always, purchase your MRCOOL parts and equipment from MRCOOL DIY Direct, the USA’s most trusted MRCOOL dealer.

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    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.

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