Upgrade your comfort with the MRCOOL DIY 5th Gen Multi-Zone 18,000 BTU 3-Zone Ductless Mini-Split System with Ceiling Cassettes—the ultimate solution for discreet, efficient, and customizable climate control. Designed for spaces that demand both performance and aesthetics, this system supports up to three ceiling cassette air handlers in any combination of 6K, 9K, or 12K BTUs.
This system features MRCOOL’s DIY® installation technology, allowing homeowners to handle setup without special tools, training, or professional labor. The low-profile ceiling cassettes blend seamlessly into your ceiling, maximizing wall space while delivering powerful airflow throughout the room.
Each zone operates independently and can be controlled remotely via the MRCOOL SmartHVAC app, or by voice with Amazon Alexa and Google Assistant. Whether you're heating or cooling, this system provides quiet, even comfort all year long.
Key Features:
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18,000 BTU condenser supports up to 3 zones
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Pairs with 6K–12K BTU ceiling cassette air handlers
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True DIY® installation with quick-connect lines
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Ultra-slim ceiling cassette design for flush mounting
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SEER2 rating up to 22.3 for high energy efficiency
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Individual zone control via smartphone or voice
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Whisper-quiet operation and automatic swing functionality
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Gold Fin® corrosion-resistant technology
What’s Included:
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(1) 18K BTU 5th Gen Multi-Zone DIY Condenser
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(3) Ceiling Cassette Air Handlers (size varies by configuration)
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(3) Remotes
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Full Installation accessories
| BRAND NAME | MRCOOL |
| SERIES |
DIY 5th gen Multi-Zone Mini-splits
|
| MODEL |
DIY-MULTI3-18HP230D-O
|
| GTIN | 840255587617 |
| UPC | 840255587617 |
| SHORT DESCRIPTION |
MRCOOL® 18k DIY 5th Generation 3 Zone Multi-Zone Mini-Split Condenser 230v
|
| LONG DESCRIPTION |
We are thrilled to announce our new 5th Generation MRCOOL® DIY® 18k BTU Multi-Zone Ductless Mini Split Condenser, which is the best and most convenient way to get comfortable. You won’t need the services of an HVAC professional to install this unit, because it’s do-it-yourself! Achieving a SEER2 rating of 23.9 and an HSPF2-4 rating of 10, you can rest easy knowing this unit will help you save money as you chill. This condenser can also support up to three air handlers, meaning it can heat and cool three rooms that are a combined 750 square feet in size, making it a perfect option if you have spare bedrooms in need of heating and cooling. What makes this system different is our patented pre-charged Quick Connect® line sets filled with R-454B, an incredibly efficient and eco-friendly refrigerant. This switch from the previous refrigerant makes the system even more efficient and sustainable than before. The design of these innovative line sets allow you to install the system yourself, saving you time and money. These line sets are sold separately. This condenser is more than just a heating and cooling unit. When operating as a system, you will be able to experience total customization with the unit’s wealth of features. For example, you can integrate your system with Amazon Alexa or Google Home through the Smart HVAC app, allowing you to control your system with your voice and monitor its operation with the touch of a button. You can also set schedules, temperature ranges, and mode of operation through the app. The power of comfort is in your hands with this system. In the unlikely event that something happens to the system, we’ve got you covered. The DIY® series comes with one of the best warranties in the industry - a 7 year compressor warranty, a 5 year parts warranty, and a Limited Lifetime Replacement warranty with enrollment in the MRCOOL® Care Program. Give yourself the best comfort with the DIY®.
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| FEATURE LIST |
Intertek listed 5031495
Easy DIY installation Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit. Keep the included remote close by, and MRCOOL DIY®'s Follow Me® function will track the air temperature around you to ensure maximum comfort. The MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box. |
| SEER2 | 23.9 |
| EER2 | 13 |
| HSPF2-4 | 10 |
| HSPF2-5 | 7.8 |
| TONNAGE | 1.5 |
| COOLING CAPACITY (BTU) | 18000 |
| HEATING CAPACITY (BTU) | 18000 |
| VOLTAGE (V) | 208/230 |
| PHASE | 1 |
| CYCLE | 60 |
| MAX FUSE BREAKER (A) | 20 |
| MIN CIRCUIT AMPACITY (A) | 16 |
| COLOR | White |
| ZONE CAPACITY | 3 |
| REFRIGERANT TYPE | R-454B |
| REFRIGERANT VOLUME (OZ) | 61.73 |
| DECIBEL RATING (DBA) | 60 |
| INVERTER | DC |
| LINE SET LENGTH | 25 |
| MAX LINESET LENGTH (FT) | 172.2 |
| LIQUID LINE SIZE | 1/4 |
| SUCTION LINE SIZE | 3/8 |
| COMPRESSOR MOTOR TYPE | Rotary |
| AUXILIARY HEATER INCLUDED | No |
| AUXILIARY HEATER AVAILABLE | No |
| FAN ONLY OPTION | Yes |
| QUIET MODE | Yes |
| AUTO COOL | Yes |
| WIFI COMPATIBILITY | Yes |
| APP COMPATIBILITY | Yes |
| WORKS WITH IOS | Yes |
| WORKS WITH ANDROID | Yes |
| UL LISTED | Yes |
| ETL LISTED | Yes |
| ENERGY STAR CERTIFIED | Yes |
| AHRI CERTIFIED | Yes |
| REGISTERED WARRANTY |
Extended Limited Lifetime*
|
| BASE PARTS WARRANTY | 5 |
| BASE COMPRESSOR WARRANTY | 7 |
| HAS BATTERIES | Yes |
| CONTAINS ELECTRONICS | Yes |
| CONTAINS CHEMICALS | Yes |
| CONTAINS AEROSOL | Yes |
| CONTAINS COMPRESSED GAS | Yes |
| PROPOSITION 65 WARNING | Yes |
| NET DEPTH (IN) | 13.46 |
| NET HEIGHT (IN) | 26.5 |
| NET WIDTH (IN) | 35.04 |
| NET WEIGHT (LBS) | 101.63 |
| GROSS DEPTH (IN) | 17.24 |
| GROSS HEIGHT (IN) | 29.53 |
| GROSS WIDTH (IN) | 40.55 |
| GROSS WEIGHT (LBS) | 109.57 |
