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Description
MRCOOL DIY Mini Split - 21,000 BTU 2 Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump with Install Kit Select LIne Set LengthMRCOOL DIY 4th Gen 18K BTU Dual Zone Ceiling Cassette Mini Split System (9K + 12K) The MRCOOL DIY 4th Gen Dual Zone Mini Split System is a cutting edge HVAC solution that combines energy efficiency, sleek design, and DIY friendly installation. This system includes everything you need to heat and cool two separate spaces with ease. Featuring both a 9K BTU ceiling cassette and a 12K BTU ceiling cassette, this system provides tailored comfort for areas
MRCOOL DIY 4th Gen 18K BTU Dual Zone Ceiling Cassette Mini Split System (9K + 12K)
The MRCOOL DIY 4th Gen Dual Zone Mini Split System is a cutting-edge HVAC solution that combines energy efficiency, sleek design, and DIY-friendly installation. This system includes everything you need to heat and cool two separate spaces with ease. Featuring both a 9K BTU ceiling cassette and a 12K BTU ceiling cassette, this system provides tailored comfort for areas up to 375 sq. ft. and 500 sq. ft., respectively. The 21 SEER efficiency rating ensures cost-effective operation while delivering powerful heating and cooling performance.
What’s Included
-
MRCOOL DIY 18K BTU 2-Zone Condenser:
- High-performance heating and cooling with up to a 21 SEER efficiency rating.
- Operates reliably in extreme temperatures, heating as low as -13°F and cooling up to 122°F.
- Backed by a 7-year compressor replacement warranty and a 5-year parts warranty for peace of mind.
-
Ceiling Cassette Air Handlers:
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9K BTU Air Handler:
- Covers up to 375 sq. ft..
- Features multiple operating modes: Cool, Heat, Auto, Dry, and Sleep.
-
12K BTU Air Handler:
- Covers up to 500 sq. ft..
- Includes versatile modes for personalized comfort.
- Both air handlers offer low-profile installation and a discreet design.
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9K BTU Air Handler:
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Pre-Charged Line Sets (16, 25, 35, or 50 ft.):
- Pre-filled with R-410A refrigerant for a DIY-friendly installation.
- Quick Connect fittings make setup fast, easy, and secure.
System Highlights
1. Energy Efficiency
- 21 SEER Efficiency Rating: Optimized for energy savings without sacrificing performance.
- Eco-Friendly Refrigerant: Uses R-410A, a non-ozone-depleting refrigerant, for sustainable operation.
2. DIY Installation
- No HVAC Technician Required: Pre-charged line sets and easy instructions make setup straightforward for homeowners.
- Cost-Effective: Save thousands on installation while enjoying professional-grade performance.
3. Advanced Ceiling Cassette Design
- Sleek and Discreet: The ceiling-mounted air handlers blend seamlessly into any room, conserving wall space and enhancing aesthetics.
- Easy Maintenance: With the Elevation Function, the filter panel lowers for quick and effortless cleaning.
- Quiet Operation: Enjoy whisper-quiet performance, ideal for bedrooms, living rooms, or offices.
4. Reliable Year-Round Comfort
- Extreme Temperature Operation: Capable of heating in temperatures as low as -13°F, ensuring dependable performance in harsh climates.
- Wide Coverage: Heat and cool two separate rooms with tailored comfort for each space.
Specifications
Condenser
- Cooling Capacity: 18,000 BTU
- Heating Capacity: 18,000 BTU
- Efficiency Ratings: SEER: 21, EER: 12.5
- Operating Temperatures: Heating: -13°F to 75.2°F | Cooling: 5°F to 122°F
- Warranty: 7-year compressor replacement, 5-year parts
- Dimensions: 35.04"W x 13.46"D x 26.50"H
Ceiling Cassette Air Handlers
-
9K BTU Air Handler:
- Coverage: Up to 375 sq. ft.
- Modes: Cool, Heat, Auto, Dry, Sleep
- Dimensions: 50.31"W x 13.19"D x 8.98"H
-
12K BTU Air Handler:
- Coverage: Up to 500 sq. ft.
- Modes: Cool, Heat, Auto, Dry, Sleep
- Dimensions: 50.31"W x 13.19"D x 8.98"H
Pre-Charged Line Sets
- Lengths Available: 16, 25, 35, or 50 feet
- Pre-Charged Refrigerant: R-410A
- DIY Installation: Quick Connect fittings for secure, leak-proof connections
Benefits of the MRCOOL DIY Ceiling Cassette System
- Customizable Comfort: Heat or cool two rooms independently with dual air handlers.
- Sleek, Low-Profile Design: Ceiling cassettes provide a clean, unobtrusive solution for heating and cooling.
- Easy DIY Installation: Save time and money with pre-charged line sets and simple setup.
- Energy Efficiency: Lower your utility bills with an industry-leading SEER rating.
- Durable and Reliable: Operates in extreme temperatures with robust warranties for long-term peace of mind.
Perfect Applications
- Homes: Ideal for bedrooms, living rooms, home offices, or bonus rooms.
- Offices: Maintain efficient climate control in workspaces.
- Renovations: Flexible and efficient for retrofitting older spaces without ductwork.
Order Now
The MRCOOL DIY 4th Gen 18K BTU Dual Zone Ceiling Cassette Mini Split System offers a unique blend of energy efficiency, modern design, and unparalleled convenience. Perfect for homeowners and DIY enthusiasts, this system is your solution for reliable heating and cooling in two separate spaces.
Order today from MRCOOL DIY Direct and start enjoying personalized comfort in every room!
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 24 reviews
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Product Reviews
★★★★★ 4
Reputable, reasonably priced fuel additive to clean valves, with handy dispenser. Not all comes out.
Size: 300 Milliliter, Size: 300 Milliliter
Honest review of Liqui Moly 2007 Jectron Gasoline Fuel Injection Cleaner - 300 ml , blue @ $8.68 at time of order.
I recently acquired a 2002 Ford Taurus with the 3.0L V6 and DOHC. It only had about 131,000 miles on it, but I noticed it seemed like there would be some intermittent misses in the firing. Other than oil changes, I do not believe that this vehicle was mechanically well maintained. After some research and reading reviews of products, I opted to try some injection cleaner as one step in a treatment regimen. I will endeavor to update this review with results after giving it time to work.
Likes:
Amazon Prime shipping, returns and refunds within 30 days of receipt.
Reputable product.
The price point seemed reasonable, especially if it works as advertised (10.1 ounces, single treatment can).
Comes with dispensing attachment for easier pouring.
Dislikes:
The design of the can and pouring mechanism left a small amount of product inside the can of valve cleaner. Even completely inverting the can it wouldn’t come out. Granted, it wasn’t a whole lot, but I paid for all of it, not for some left in the can that wouldn’t even shake out. Sorry if this sounds nitpicky, but it is also a problem for disposal afterwards as it has to sit out and evaporate or put it in the trash with flammable liquid inside.
Meh:
I have put several miles on since adding this to just over a quarter tank of fuel and have not noticed any improvements. I realize it might take a while longer perhaps.
Hopefully this honest review helps someone decide about this product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 6, 2023
★★★★★ 5
Helped smooth engine idle and acceleration
Size: 300 Milliliter
Bought a new to me bmw and this stuff made it run smoother definitely helped clean things up internally car has a smoother throttle response and sounds smoother at idle will definitely be using as recommended to keep injectors and internals cleaner
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 9, 2026
★★★★★ 5
This is the product you want
Size: 300 Milliliter
'08 Honda Fit 270k
This product works! Felt almost immediately, acceleration opened up.
Excellent.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 5, 2026
★★★★★ 5
This stuff really works fast and improves mpg like you won’t believe
Size: 300 Milliliter
I’ve tried many other types of fuel injector cleaners but this brand is amazing. I ran my truck down to less than a quarter of a tank of gas and poured it into the tank. I then drove 30 miles to an appointment and spent an hour in the appointment on the way home I noticed my mpg had gone up significantly. My truck tells me how many miles per gallon. I’m getting as I drive. I had gotten a code and I replaced the mass air filter and found a slight crack in an air hose, which I replaced that help with my code a little bit, but cleaning the fuel injectors with this product made such a significant difference. I just simply had a hard time believing it, but it’s true.
I’m done with all those other brands of fuel injector cleaners which never really seemed to help much if you really want an amazing experience give this product to try.
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Reviewed in the United States on August 4, 2025
★★★★★ 5
Direct fit
Style: Standard Air Filter
Good price and direct fit, good quality, compatible with factory filter, easy install for DIY service.
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Reviewed in the United States on May 24, 2026