SKU: 65958175590

MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 24 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes

Sale price$2849.85 Regular price$3166.50
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Description

MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 24 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling CassettesUpgrade your comfort with the MRCOOL DIY 5th Gen Multi Zone 18,000 BTU 3 Zone Ductless Mini Split System with Ceiling Cassettesthe 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 MRCOOLs DIY installation technology, allowing

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:

  • 18,000 BTU condenser supports up to 3 zones

  • Pairs with 6K–12K BTU ceiling cassette air handlers

  • True DIY® installation with quick-connect lines

  • Ultra-slim ceiling cassette design for flush mounting

  • SEER2 rating up to 22.3 for high energy efficiency

  • Individual zone control via smartphone or voice

  • Whisper-quiet operation and automatic swing functionality

  • Gold Fin® corrosion-resistant technology


What’s Included:

  • (1) 18K BTU 5th Gen Multi-Zone DIY Condenser

  • (3) Ceiling Cassette Air Handlers (size varies by configuration)

  • (3) Remotes

  • Full Installation accessories

DIY OUTTASIGHT BROCHURE

MULTIZONE BROCHURE

INSTALL MANUAL

REMOTE MANUAL

WARRANTY DOC

ACCESSORY MANUAL

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®.
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
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: 65958175590

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Carol PA
Chelsea, US
★★★★★ 5
protection plan is easy.
The protection plan worked on my coffee pot. It was just over 14 months and started to leak. I first called amazon and they sent me a link to the protection plan. It was very easy to use. I received a Amazon gift card instead of a replacement. The price of the coffee pot had increased so you will receive the lower option. I did receive the total cost of the pot at the time I purchased it.
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Reviewed in the United States on January 18, 2026
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Betty
Fort Morgan, US
★★★★★ 5
Great price & works fast.
Compact and fast - I love it! Could not beat the price and it's faster than my Food Saver!
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Reviewed in the United States on April 17, 2026
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Patty
Natrona Heights, US
★★★★★ 5
Protection Plan
The process was easy and flawless
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Reviewed in the United States on June 1, 2026
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E. K. E.
Lake Worth, US
★★★★★ 5
It is worth purchasing a Protection Plan on an unfamiliar item
Bought a 3-year protection plan for a nut milk maker machine for $5.99. It was a fairly new kitchen item in our household and we were not familiar with the brand. So, I bought the plan for a piece (peace) of mind. The machine worked nicely for about 18-20 months with daily use until it tripped the circuit outlet. My initial chat with Asurion did not go as I expected due to discrepancy on their end as they see a protection plan for the nut milk maker as a sporting goods valued between $100-$199, not as a kitchen item valued between $30-$39.99. ( I had bought 3 different protection plan on th same day for multiple items purchased on Prime Days). They were looking at a different plan and I was unable to get them to "scroll over" to the appropriate protection plan. I tried again on a different day during the first hour of their contact hours and had a cheerful Asurion agent who was able to find the appropriate kitchen item protection plan. It was a simple and thorough conversation and transaction. I was refunded within hours after I packed up and dropped off the damaged item out to UPS. Moral of the story: Asurion Protection Plan is worth it and contact them at the start of their first day shift, not at the end of their evening shift.
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Reviewed in the United States on May 24, 2026
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Brian
Lake Worth, US
★★★★★ 5
Warranty Plan
Hop I won’t have to use the warranty but it was reasonably priced.
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Reviewed in the United States on April 21, 2026

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