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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4.0 ★★★★★
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Product Reviews
J
Verified Purchase
Janelle Fairbanks
Massapequa, US
★★★★★ 4
Best for a single dog but quality products
Color: Lake Blue, Size: Large Size 3 (8")
Straps didn’t hold up my two herding dogs did a number on it but it is a quality product the ball itself is still in tact
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 15, 2026
C
Verified Purchase
Cary johnson
Carnegie, US
★★★★★ 5
its a great fun toy fir all of us
Color: Red-Blue, Size: Medium Size 2 (6")
its very tough so our dogs cant tear it up but soft enough so they get an easy hold. They absolutely love. great dog toy!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
M
Verified Purchase
momOfMaxx
Fort Morgan, US
★★★★★ 5
zelda‘s “indoor” ⚽️ ball!
Color: Squeaky Green, Size: Medium Size 2 (6")
zelda loves her soccer ball - because of the fabric “tabs”, and the way she treats her toys, we keep it inside. she loves to place all of her toys and bones on our bed, after they’ve been cleaned. this ball is perfect and soft enough to throw it down our steps, where she will run down, retrieve it, and bring it back to the bed. it arrives deflated and comes with the pump and two needles - the pump is not the sturdiest and felt like it was not inflating, but after only having to reflate it once with a bit of air since receiving it ~5-6 months ago, it still holds up!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 2, 2026
D
Verified Purchase
Desy
Birmingham, US
★★★★★ 3
Small for a medium
Color: Red-Blue, Size: Medium Size 2 (6"), Color: Red-Blue, Size: Medium Size 2 (6")
I got medium.. and it does not look like a medium ball.. it’s rather small. It’s pretty sturdy and my dogs went crazy for it but it’s definitely not the size I thought it was going to be 😂 my dogs chewed one strap within 5 minutes of having it but they’re dogs and that’s what they do lol. I bought this to be an outside ball for them! It’s pretty light but that’s probably because it’s small. Not soft? But feels like a soccer ball. It also had no smell coming out of the box. Also comes with a pump and an extra thing to put in the ball to pump in case you lose one. I like these balls, I expect them to be chewed up because that’s what I bought them for! Fun for my dogs and they are! But the size… it is not medium and that’s the only reason for 3 stars 😂😂😂 Other then that I recommend, your dog will definitely love this! Inside or outside playing! Alone or with another dog!
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Reviewed in the United States on October 15, 2025
J
Verified Purchase
James T.
Houston, US
★★★★★ 5
Great toy for a GSD
Color: Blue Gray, Size: Extra Large Size 5 (9")
My GSD loves to grab the flaps and shake her head with the ball bouncing of the side of her head. This is her favorite toy. I thought she would puncture it but it has held up great since she likes to grab the flaps rather than biting the ball.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026

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