SKU: 57643976400

MRCOOL DIY Mini Split - 21,000 BTU 2 Zone Ductless Air Conditioner and Heat Pump, DIY-B-218HP0912

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Description

MRCOOL DIY Mini Split - 21,000 BTU 2 Zone Ductless Air Conditioner and Heat Pump, DIY-B-218HP0912MRCOOL DIY Mini Split 21,000 BTU 2 Zone Ductless Air Conditioner and Heat Pump (DIY B 218HP0912) The MRCOOL DIY 4th Gen 21,000 BTU 2 Zone Mini Split System provides an energy efficient and user friendly solution for heating and cooling two independent spaces. Featuring a powerful 18K BTU condenser, a 9K BTU wall mounted air handler, and a 12K BTU wall mounted air handler, this system is designed for easy installation and smart operation. With its

MRCOOL DIY Mini Split - 21,000 BTU 2-Zone Ductless Air Conditioner and Heat Pump (DIY-B-218HP0912)

The MRCOOL DIY 4th Gen 21,000 BTU 2-Zone Mini Split System provides an energy-efficient and user-friendly solution for heating and cooling two independent spaces. Featuring a powerful 18K BTU condenser, a 9K BTU wall-mounted air handler, and a 12K BTU wall-mounted air handler, this system is designed for easy installation and smart operation. With its advanced features and quiet performance, this ductless HVAC system ensures year-round comfort for your home or office.


What’s Included

  1. MRCOOL DIY 18K BTU Multi-Zone Condenser:

    • Delivers an impressive 21 SEER efficiency rating, ensuring energy savings.
    • Operates in extreme temperatures, heating as low as -13°F and cooling up to 122°F.
    • Comes with a limited lifetime compressor warranty through the MRCOOL Care Program for unmatched reliability.
  2. Wall-Mounted Air Handlers:

    • 9K BTU Air Handler:
      • Covers up to 375 sq. ft., ideal for smaller rooms like bedrooms or offices.
    • 12K BTU Air Handler:
      • Covers up to 500 sq. ft., perfect for larger living rooms or open areas.
    • Both units feature compact, wall-mounted designs for seamless integration into any space.
  3. Two Remote Controllers:

    • Allows independent control of temperature, mode, and fan speed for each zone.
  4. Optional Line Sets:

    • Pre-charged line sets are available in standard or longer lengths for flexible installation (additional cost applies).

Key Features

1. Energy Efficiency

  • 21 SEER Efficiency Rating: Maximizes energy savings without compromising on performance.
  • Eco-Friendly Refrigerant: Utilizes R-410A, an environmentally friendly and efficient refrigerant.

2. DIY-Friendly Installation

  • Pre-Charged Line Sets: Enables quick and straightforward installation without the need for professional tools or technicians.
  • Step-by-Step Support: Includes detailed guides and video tutorials to make setup easy for DIY enthusiasts.

3. Advanced Air Handler Features

  • Multiple Operating Modes: Includes Cool, Heat, Auto, Dry (dehumidify), Fan-Only, Quiet, and Sleep modes for personalized comfort.
  • Smart Connectivity: Compatible with the Smart HVAC app, allowing remote control via Apple or Android devices.
  • Quiet Operation: Operates with minimal noise, making it ideal for bedrooms and offices.

4. Reliable Year-Round Comfort

  • Extreme Temperature Operation: Provides efficient heating even in sub-zero temperatures as low as -13°F, and cooling in high temperatures up to 122°F.
  • Intelligent Load Management: Ensures the combined BTU output of both air handlers does not exceed the condenser's 18K BTU capacity when running simultaneously.

Specifications

Condenser

  • Cooling Capacity: 18,000 BTU
  • Heating Capacity: 19,000 BTU
  • Efficiency Ratings: SEER: 21, EER: 12.5
  • Operating Temperatures: Heating: -13°F to 75.2°F | Cooling: 5°F to 122°F
  • Voltage Requirements: 208V-230V/60HZ/18-25A
  • Dimensions: 35.04"W x 13.46"D x 26.50"H
  • Warranty: 7-year condenser replacement, 5-year parts

Wall-Mounted Air Handlers

  • 9K BTU Air Handler:
    • Coverage Area: Up to 375 sq. ft.
    • Cooling/Heating Capacity: 9,000 BTU
    • Dimensions: 31.57"W x 7.44"D x 11.69"H
    • Modes: Auto, Cool, Heat, Dry, Fan-Only, Quiet, Sleep
    • Warranty: 5-year parts
  • 12K BTU Air Handler:
    • Coverage Area: Up to 500 sq. ft.
    • Cooling/Heating Capacity: 12,000 BTU
    • Dimensions: 31.57"W x 7.44"D x 11.69"H
    • Modes: Auto, Cool, Heat, Dry, Fan-Only, Quiet, Sleep
    • Warranty: 5-year parts

Benefits of the MRCOOL DIY 2-Zone Mini Split System

  1. Customizable Comfort:

    • Independently control two separate zones with individual air handlers and remote controls.
    • Ideal for small to medium-sized rooms such as bedrooms, home offices, and living spaces.
  2. Smart Control:

    • Operate the system remotely using the Smart HVAC app on your smartphone.
    • Adjust temperature, mode, and fan speed from anywhere for convenience and control.
  3. Energy Savings:

    • Reduce energy consumption with a 21 SEER rating.
    • Sleep and Timer functions further optimize energy usage during non-peak hours.
  4. Quiet and Reliable:

    • Designed for whisper-quiet operation, ensuring minimal disruption in any environment.
    • Built to last, with a robust warranty program and durable components.
  5. DIY Convenience:

    • Save thousands on installation costs with a simple and efficient DIY process.
    • Pre-charged line sets eliminate the need for professional refrigerant handling.

Perfect Applications

  • Homes: Heat and cool two separate rooms, such as bedrooms, offices, or compact living spaces.
  • Offices: Maintain comfortable temperatures in multi-room professional environments.
  • Renovations: A flexible and efficient option for retrofitting older buildings or integrating HVAC into new construction.

Order Now

The MRCOOL DIY 4th Gen 21,000 BTU 2-Zone Mini Split System offers the perfect balance of energy efficiency, customizable comfort, and easy installation. Whether you’re upgrading your home or outfitting an office, this system provides dependable year-round climate control.

Order today from MRCOOL DIY Direct and enjoy reliable heating and cooling at your fingertips!

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 57643976400

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4.8 ★★★★★
Based on 25 reviews
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E
Verified Purchase
Ed R.
New York, US
★★★★★ 5
A really nice scale at a budget price!
Color: Black
Does a really nice job for a budget scale! I had an Amazon basics scale (which works great and I still use!), but I needed/wanted a tenth of a gram for weighing Moka Pot water and coffee. I can put this scale on my water dispenser, measure out exactly what I need, then put the Moka Pot filter (in a glass jigger so it stands up :-) on the scale (with a magnetic espresso funnel) and measure out my coffee. It holds up to daily use and is accurate. Nice job for my first "professional" scale :-)!
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Reviewed in the United States on May 4, 2026
C
Verified Purchase
CactusReader
Lowell, US
★★★★★ 4
Solid little workhorse
Color: Space Grey
Works well. Key part of my espresso setup. Battery charge lasts. Easy to use. My only gripe is that the power switch can be hard (for me) to turn on and off without lifting it up to find it.
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Reviewed in the United States on March 15, 2026
J
Verified Purchase
julz
Boise, US
★★★★★ 5
Worth it!
Color: Black
A necessity for anyone trying to elevate their espresso making game. I use this to measure my beans and to also measure the shot I pull and how long it takes to pull. It’s great quality and totally worth it. The scale is very quick to start when the shot starts to pull. Easy to use and a great scale.
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Reviewed in the United States on April 2, 2026
J
Verified Purchase
Jeffrey D. Lane
Lake Worth, US
★★★★★ 5
Works prefectly, accurate, easy to use, and looks great.
Color: Black
I didn't expect much but it works really well and seems to be very accurate. It's much more sensitive (to 0.1g) than the scale I was using to measure my coffee and the autostart timer works really well. Also, unlike my other scale, this one is USB-C rechargable and so far has no indication of needing a recharge after a week or so of daily use. My other scale uses CR2032 batteries and goes through a pair every three weeks, so being able to recharge instead is quite nice. It's small and I can use it to time the extraction and also use it to measure out heated water for tea, or whatever I need. This is definitely a steal for the price.
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Reviewed in the United States on December 9, 2025
L
Verified Purchase
lasersailor
Lexington, US
★★★★★ 5
Great value and full-functioned.
Color: Black
This is a simple, elegant little scale with timer. It's perfect for use with a small espresso machine like my Breville Bambino Plus. It shifts easily from counter use weighing beans before grinding, to placing on the drip tray to time and weigh shots. The top is smooth and water resistant. I think it's a great value.
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Reviewed in the United States on February 19, 2026

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