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MRCOOL DIY® 5th Gen E Star 18,000 BTU Single Zone Ceiling Cassette Mini Split Complete System 230V with 25 ft. DIY Quick Connect Line Set and DIYPRO Cable

5.0 3 reviews
Model: DIY-18-HP-CM-230D25-OMore from MRCOOL
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$3,418.00
$3,418.00 $3,900.00
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Includes a 25 ft. line set. Need a longer one? Add a longer line set →

In Stock · Delivers Nov 23-27 (Est.)
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MRCOOL DIY® 5th Gen E Star 18,000 BTU Single Zone Ceiling Cassette Mini Split Complete System 230V with 25 ft. DIY Quick Connect Line Set and DIYPRO Cable

$3,418.00
$3,418.00 $3,900.00

Free shipping
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Product Overview

  • Zones: 1

  • Covers 750 sq ft.

  • DIY Installation

  • Voltage: 208-230V

  • ENERGY STAR Certified

What size mini split do I need?

Takes about 10 seconds.

sq ft

We recommend

9,000BTU

6K9K12K18K24K36K
Shop MRCOOL DIY mini splits Or build your own system
See the BTU coverage guide
6,000 BTU100-150 sq ft
9,000 BTU151-350 sq ft
12,000 BTU351-500 sq ft
18,000 BTU501-750 sq ft
24,000 BTU751-1,000 sq ft
36,000 BTU1,001-1,500 sq ft

This is an estimate. Insulation, windows and the number of appliances in the room can change what you need. For assistance, contact our Product Experts.

DESCRIPTION

Upgrade your space with the 5th Gen MRCOOL® DIY® 18K BTU Single Zone Mini-Split and the OuttaSight® 18K BTU One-Way Ceiling Cassette – two innovative climate control solutions designed for year-round heating and cooling in rooms up to 750 sq. ft. Both systems are built for effortless DIY installation, delivering professional-grade performance without the cost of professional setup. With energy-efficient operation, eco-friendly refrigerant, and multiple smart control options, MRCOOL® gives you comfort, convenience, and peace of mind backed by industry-leading warranties.

  • America’s #1 DIY Mini Split: Trusted nationwide for reliable, hassle-free installation and top-tier performance.
  • DIY® QuickConnect® Line Set: Pre-charged with eco-friendly R-454B refrigerant for a quick, vacuum-free setup.
  • Eco-Friendly Refrigerant: R-454B offers lower Global Warming Potential (GWP) than R-410A, reducing environmental impact.
  • DIYPRO® Cable: Built to withstand outdoor conditions and wildlife without the need for electrical conduit.
  • Wireless Control Options: Adjust settings with the remote, SmartHVAC app, or voice control via Alexa and Google Assistant.
  • Follow Me Function: Delivers consistent comfort by adjusting airflow based on the remote’s location.
  • Dry Mode: Reduces excess humidity to improve indoor air quality and overall comfort.
  • Gold Fin® Condenser: Corrosion-resistant design ideal for coastal and long-term durability.
  • Compact Ceiling Cassette: Flush-mounted design fits between 16” joists, perfect for new builds or retrofits.
  • Flexible Application: Eliminates the need for ductwork or wall space, offering more installation options.
  • Advanced Filtration: Enhances indoor air quality with easy filter access for maintenance.
  • Quiet Operation: Runs efficiently without disruptive noise for a peaceful environment.
  • Warranty Protection: Includes a 7-year compressor warranty, and 5-year parts warranty.
  • Certified Excellence: Intertek listed 5031495 for guaranteed reliability and safety.

SPECIFICATIONS & DIMENSIONS

  • Dimensions & Weight
  • Condenser Dimensions: 35.04 W" x 13.46 D" x 26.50 H"
  • Air Handler Dimensions: 42.52 W" x 8.90 D" x 13.19 H"
  • Condenser Weight: 93.48 lbs / 42.4 kg
  • Air Handler Weight: 35.49 lbs / 16.1 kg
  • Capacity & Performance
  • Zone Capacity: 1
  • Cooling Capacity: 18,000 BTU
  • Outdoor Operating Temperature (Cooling): -13°F - 122°F
  • EER2: 13.7
  • SEER2: 22.5
  • Heating Capacity: 18,000 BTU
  • Outdoor Operating Temperature (Heating): -13°F - 75°F
  • HSPF2-4: 11.5
  • HSPF2-5: 8.5
  • Coverage Area: 500 to 750 sq ft.
  • Outdoor Noise Level: 58.5 dB(A)
  • Indoor Noise Level (Hi/Mi/Lo): 54.5/44.5/40.5/30.5/19.0 dB(A)
  • Electrical Requirements
  • Voltage: 208-230V
  • Phase: 1
  • Cycle: 60 Hz
  • Max Fuse Breaker: 20A
  • Min Circuit Ampacity: 18A
  • Refrigerant & Piping
  • Refrigerant Type: R-454B
  • Refrigerant Volume: 44.80 oz
  • Liquid Line Size: 1/4"
  • Suction Line Size: 1/2"
  • Max Line Set Length: 98.4 ft.
  • Features
  • Inverter: DC
  • Compressor Type: Rotary
  • Fan Only Option: Yes
  • Quiet Mode: Yes
  • Auto Cool: Yes
  • Wifi Compatibility: Yes
  • App Compatibility: Yes
  • Works with IOS: Yes
  • Works with Android: Yes
  • Remote Control Included: Yes
  • Certifications & Warranty
  • Certifications: UL Listed, ETL Listed, Energy Star Certified, AHRI Certified
  • Warranty: 7 Years Compressor//5 Years Parts

INSTALLATION & GUIDES

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Product Brochure PDF
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Quick Start Guide PDF
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Installation Manual PDF
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Service Manual PDF
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Remote Manual PDF
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Warranty PDF

SHIPPING POLICY

Free Curbside Delivery
MRCOOL orders include free curbside delivery via FedEx Ground, UPS, FedEx Freight, or the most effective and affordable option for your order. Please note that delivery is to the curbside only - be sure to arrange for assistance if needed, as the carrier will not bring items inside your home.

Tracking & Delivery Scheduling
In most cases, you will receive tracking details 3-5 business days after you place your order. When the tracking number is sent, please allow 1-2 business days for the tracking number to populate details.

See our full Shipping Policy here.

RETURN POLICY

MRCOOL returns must be requested within 30 days of your delivery date. We are unable to process returns submitted after this period. Products must be unused, uninstalled, and in their original packaging, including the box and pallet, to qualify for a return.

Restocking Fee
Please note, a 30% restocking fee will be applied to all approved returns.

Non-Returnable Items
Items that cannot be returned: Lineguards, wall mounts, linesets, couplers. Accessories are not returnable. This includes, but is not limited to, any add-ons, trim, parts and accessory items sold with or for the product.

See our full Return Policy here.

Compare single zone models

Pick your BTU size to see how the MRCOOL DIY models compare.

BTU

About MRCOOL

Industry's Only DIY Mini Split Ductless System!

Upgrade your home’s heating and cooling with the MRCOOL DIY Mini Split, designed for hassle-free installation and superior energy efficiency. With its innovative patented pre-charged line sets, you can enjoy year-round comfort without the need for professional help. Ideal for homeowners, the MRCOOL DIY series offers customizable climate control with a high SEER rating, ensuring you save on energy bills while maintaining optimal comfort. Key features include a variable-speed inverter compressor, wireless control through smart devices, and compatibility with Amazon Alexa and Google Assistant for seamless home automation. Available in various sizes, this system provides reliable and quiet operation, perfect for bedrooms, living rooms, or any space in your home. Backed by an industry-leading warranty, the MRCOOL DIY Mini Split is the perfect solution for homeowners seeking powerful performance, ease of use, and long-term savings.

See more about MRCOOL
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This product has no reviews of its own. The merchant grouped it with related products, so the reviews shown are from across that group.
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Graciella Rodriguez
Mr Cool cooling & heating

My son is enjoying the system I bought for his room. It is easy to operate and is working great.

Graciella Rodriguez review photo Graciella Rodriguez review photo
B
Brian Gehring
Amazing Product Awesome Customer Service!

I live in southern California and run an Airbnb out of my home. I was always concerned that my guest couldn’t control there own heat or A/C. So I decided to research my options. In so doing came across the Mr Cool split. After looking at other options all of which were way more expensive, I settled on the Mr Cool Mini split and decided to install in my self. The step by step instructions were easy to understand and well illustrated. After completing the project and starting the unit I was amazed how quiet and efficient the unit was! I would not hesitate to recommend this product to my friend ends and family.

Brian Gehring review photo Brian Gehring review photo
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Gayle Sabol
Efficient & Easy to Install

My husband and a friend installed this in 2 days. The friend is an experience contractor, but both said it went in fairly easy. We put it in our bedroom. It is quiet and very efficient. The unit was a little larger than I'd hoped, but it's doing the job, so I'm OK with it.