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Description
MRCOOL DIY 4th Gen 2-Zone 18,000 BTU 21 SEER (9K + 9K) Ductless Mini Split AC and Heat Pump with Ceiling Cassettes - 230VMRCOOL DIY Multi Zone 4th Gen 18K BTU Dual Zone Mini Split System with Ceiling Cassettes (9K + 9K) Experience ultimate comfort and control with the MRCOOL DIY 4th Gen Multi Zone 18,000 BTU Dual Zone Mini Split System, featuring two sleek 9K BTU ceiling cassette air handlers. Designed for efficiency, quiet operation, and DIY installation, this system is ideal for heating and cooling two separate rooms without the hassle of hiring a professional HVAC
MRCOOL DIY Multi-Zone 4th Gen 18K BTU Dual Zone Mini Split System with Ceiling Cassettes (9K + 9K)
Experience ultimate comfort and control with the MRCOOL DIY 4th Gen Multi-Zone 18,000 BTU Dual Zone Mini Split System, featuring two sleek 9K BTU ceiling cassette air handlers. Designed for efficiency, quiet operation, and DIY installation, this system is ideal for heating and cooling two separate rooms without the hassle of hiring a professional HVAC technician.
What’s Included
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MRCOOL DIY 4th Gen 18K BTU Multi-Zone Condenser (DIY-MULTI2-18HP230C):
- Delivers powerful heating and cooling with up to 21 SEER efficiency.
- Operates in extreme temperatures, with heating as low as -13°F and cooling up to 122°F.
- Features a durable Gold Fin® condenser to resist corrosion, even in coastal environments.
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Two 9K BTU Ceiling Cassette Air Handlers (DIYCASSETTE09HP-230C25):
- Each unit provides coverage for spaces up to 375 sq. ft..
- Includes versatile operating modes: Cool, Heat, Dry, Fan Only, Sleep, and Auto.
- Low-profile design installs discreetly in ceilings for seamless integration.
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Pre-Charged Quick Connect Line Sets:
- Each line set comes pre-charged with R-410A refrigerant for simple DIY installation.
- Quick Connect technology allows for secure connections using basic tools, saving time and money.
System Highlights
1. DIY Installation Made Easy
This system is designed for anyone to install without professional tools or training. The Quick Connect Line Sets eliminate the need for vacuuming or refrigerant charging, making it accessible for homeowners. Detailed instructions and video guides ensure a smooth setup.
2. Multi-Zone Climate Control
The dual-zone configuration allows for independent heating and cooling in two separate rooms. Each air handler can be controlled individually to suit your preferences, ensuring everyone stays comfortable.
3. Ceiling Cassette Air Handlers
- Discreet and Space-Saving: Flush-mounted design eliminates the need for wall space and blends seamlessly into ceilings.
- Easy Maintenance: The innovative Elevation Function lowers the filter panel, allowing for quick and easy filter cleaning.
- Quiet Operation: With whisper-quiet performance, these units maintain a peaceful environment, ideal for bedrooms, offices, or living rooms.
4. Advanced Technology and Features
- Smartphone Control: Operate the system remotely using the MRCOOL Smart Controller app, compatible with Apple and Android devices.
- Voice Control: Integrates with Amazon Alexa and Google Home for hands-free operation.
- Energy Efficiency: Achieve significant energy savings with a 21 SEER efficiency rating and DC inverter technology.
- Low Ambient Heating and Cooling: Operates in extreme conditions, from -13°F for heating to 122°F for cooling.
Performance and Specifications
Condenser Specifications
- Cooling Capacity: 18,000 BTU
- Heating Capacity: 19,000 BTU
- Efficiency: SEER: 21, EER: 12.5, HSPF: 10.6
- Operating Temperatures: Cooling: 5°F to 122°F | Heating: -13°F to 75.2°F
- Warranty: Includes a 7-year compressor warranty, a 5-year parts warranty, and an optional limited lifetime compressor warranty.
- Dimensions: 35.04"W x 13.46"D x 26.50"H
- Weight: 100.53 lbs
Ceiling Cassette Air Handlers
- Cooling/Heating Capacity: 9,000 BTU each
- Coverage Area: Up to 375 sq. ft. per unit
- Modes: Auto, Cool, Heat, Dry, Fan Only, Sleep
- Dimensions: 50.31"W x 13.19"D x 8.98"H
- Noise Level: Whisper-quiet operation
Smart Features
- Digital Display: Check temperatures, troubleshoot codes, and alerts directly on the air handlers’ displays.
- Customizable Timer Function: Schedule heating or cooling to optimize energy usage.
- Sleep Mode: Automatically adjusts the temperature for energy efficiency and maximum comfort during the night.
- Emergency Cooling Mode: Quickly test cooling functionality or perform maintenance tasks with manual override controls.
Eco-Friendly and Energy-Efficient
- Environmentally Safe Refrigerant: Uses R-410A, a non-ozone-depleting refrigerant.
- Gold Fin® Technology: Protects against corrosion for long-term durability.
- Energy-Saving Design: DC inverter technology reduces energy consumption, saving you money on utility bills.
Why Choose MRCOOL DIY Multi-Zone?
- Cost-Effective DIY Installation: Avoid the high costs of professional HVAC installation.
- Customizable Comfort: Tailor each zone to your preferences with independent controls for every air handler.
- Smart Connectivity: Control your system via smartphone, voice commands, or the included remote control.
- Reliable Performance: With robust warranties and high-quality materials, MRCOOL delivers year-round comfort and peace of mind.
Perfect Applications
- Homes: Ideal for bedrooms, living rooms, or home offices.
- Offices: Create a comfortable work environment in multiple rooms.
- Retail Spaces: Maintain optimal temperatures for customers and employees.
- Renovations: A flexible and efficient solution for retrofitting older buildings.
Order Now
The MRCOOL DIY Multi-Zone 4th Gen 18K BTU Dual Zone Mini Split System is the perfect combination of performance, convenience, and affordability. Enjoy energy-efficient heating and cooling, smart technology, and the freedom of DIY installation.
Order now from MRCOOL DIY Direct, the USA’s most trusted MRCOOL dealer, and start enjoying customized comfort today!
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.8 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Excellent Rivals to Lovers!!
Format: Kindle
The tension and banter between Huntyr and Wold was delectable. I absolutely love the fallen angel and all of his flaws. Huntyr is amazing too being a badass FMC with some major trauma. The world building was great and I enjoyed the training aspect of the story. The writing was immersive and was in the story the whole time. The ending had quite a twist that I hadn’t anticipated and made my jaw DROP. Excellent job! I also loved the narration. Laura is one of my fave narrators!
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Reviewed in the United States on August 15, 2025
★★★★★ 5
Fallen Angels, fae, vampires, oh my!
Format: Kindle
Rating: 4.5 | Spice: 2 (but a good slow-burn)
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Main Characters: Huntyr and Wolf
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I couldn’t wait to read this book; there was so much hype about it! And there was no doubt why. I fell in love with the characters and the plot itself. This book is mainly plot driven more than friction driven but it’s easy to follow along with. The characters are fun, easily understood. The main setting is at an academy where both the main characters are going through trials and building strength for the final test, The Transcendent. There are fantastic side characters as well. I loved the camaraderie between Huntyr and her friends. But we don’t like Lanson. 😆
We do have some plot twists that come into play throughout the book. Secrets and betrayal to be seen. I did adore Wolf and Huntyr’s relationship. It was a classic slow burn trope. They didn’t hit it off fast, but in time their feelings grew. I loved their banter, so sexy. Wolf is your next book boyfriend; Huntyr is your next vampire assassin independent bad-a*s female. Themes include loyalty, trust, self-discovery, a true slow burn romance. Side note: book ends on a angsty cliffhanger!
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Emily, thank you for writing this awesome novel and I cannot wait to devour Book 2, Blood So Brutal! 😍
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Happy reading, my lovelies! xo
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Reviewed in the United States on January 21, 2024
★★★★★ 4
“My heart bows to you and you only, Huntress.”
Format: Kindle
3.5 🌟
This book popped up in my KU recommended reading suggestions and the synopsis sounded like what I was in the mood for. I'm so glad I took a chance on it. I went into this knowing absolutely nothing about it and ended up really liking it. I love when this happens.
The main characters are likeable and I easily found myself rooting for them. There is a mystery element to each of their backstories that I enjoyed watching unfold and can't wait to get more of. Wolf, in particular, has me fixated. Love him.
I found this to be an entertaining, addictive read with a plot that moves along at a good pace. It reads so easily I found myself very reluctant to put it down. Lots of twists and turns and the angst is there. A good set up for the next book to come, for sure.
My issues with this book....the dialogue feels a bit juvenile at times and there is a repetitive over use of a particular word phrasing that I found myself giving the ole eye-roll to. There are, without a doubt, some pretty cliche moments that gave me a bit of the cringe. I think this could've certainly 100% benefited from more depth regarding the world building. Perhaps the world building was sacrificed to keep the pacing quick? Just a guess. Also, the lack of consistency of character for the FMC was really evident and so she feels quite illogical at times.
Overall, this was a fun and enjoyable read that hit the spot well enough for me. That ending certainly has me impatiently pining for book 2!
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Reviewed in the United States on June 18, 2024
★★★★★ 3
Interesting take on the genre
Format: Kindle
True rating: 3.25 ⭐️
I enjoyed the fresh take on the genre. The best way I could describe the setting and world is an apocalyptic dystopian version of Farie where vampires, fae, and angles struggle to survive in what is left of the world. It was definitely interesting throwing the academy/hunger games aspect into this world as well.
Even though I guessed the final reveal early on in the book, I kept hoping I was wrong, and it would take a surprising turn. While the "plot twists" were a bit predictable to me, I still enjoyed the ride this book took me on.
Another downfall for me was the plot holes in the world building... I.E. if society has fallen and the world is in the aftermath of war, how are there trains running around the world? Just to take young adults to the trials to get into the golden city? How is the train maintained, the tracks clear, etc?
However, I did enjoy the FMC & MMC and thought they were fleshed out nicely. I also enjoyed the side characters but wish some were developed more like Ashalin (sp?). I do find myself rooting for the MCs to succeed and find happiness together, which is obviously an important aspect for romantasy.
Overall, was this an earth-shattering, mind-bending, terrific piece of literature? No. But was it the worst thing I've read this year? Also, no. This book has, to me, the bones of a great read & just needs a bit more to push it from an alright book to a great book.
Overall ratings:
Plot- 3.5⭐️
World building 3⭐️
Spice 2.5 🌶🌶
Main characters 4 ⭐️
Supporting characters 3.5⭐️
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Reviewed in the United States on May 12, 2024
★★★★★ 5
great book
Format: Kindle
I am really excited to meet the author at the book retreat this month. I really enjoyed this world that she built and most of the female main character Huntress is so awesome. She goes through a lot in this book and the ending; wow! I wouldn't have even guessed. I highly recommend everyone to read this book.
I have been so lucky this year that almost all the books I have read have been, so far, 5 out 5 stars.
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Reviewed in the United States on June 2, 2026