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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

Model: DIY-18-HP-CM-230D25-O
$3,418.00
$3,418.00 $3,900.00
-12%
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This item is in stock! Estimated Arrival: Sep 18 to Sep 24

Air conditioning unit with indoor and outdoor components, hoses, and connectors on a white background.
$3,418.00
$3,418.00 $3,900.00

What's Included

  • MRCOOL DIY® 5th Gen E Star 18,000 BTU Single Zone Mini Split Condenser 230V with 25 ft. DIY Quick Connect Line Set, DIY-18-HP-C-230D25-O

    18K BTU Condenser

    Quantity: 1
  • MRCOOL DIY® 5th Gen 18,000 BTU Multi-Zone Mini Split Ceiling Cassette Air Handler 230V, DIYCASSETTE18HP-230C25-O

    18K BTU Air Handler

    Quantity: 1
  • MRCOOL DIY® 5th Gen 25 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set - R454B (for 18K Indoor Units)

    25 ft. 1/4 x 1/2 Line Set

    Quantity: 1
  • MRCOOL® Remote Control for MRCOOL DIY Ductless Systems - 4th Generation

    Remote Control

    Quantity: 1

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System Details

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 limited lifetime warranty, 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
  • EER2: 13.7
  • SEER2: 22.5
  • Heating Capacity: 18,000 BTU
  • 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 // Extended Limited Lifetime Replacement // *If the original owner does not register the unit, the warranty defaults to the standard 5 year parts, 7 year compressor warranty // **The original, registered owner must be enrolled in the MrCool Care Program every year in order to qualify for the 7 year full unit replacement for compressor failure and lifetime compressor replacement.

INSTALLATION & GUIDES

Product Brochure
Installation Manual
Remote Control Manual
Warranty Document
AHRI Certificate
Energy Guide

SHIPPING POLICY

Free Curbside Delivery
MRCOOL orders include free curbside delivery via FedEx Ground, FedEx Freight, or the most trusted carrier available. 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 35% restocking fee will be applied to all approved returns.

Non-Returnable Items
Accessories including lineguards, wall mounts, linesets, couplers, and similar items are not eligible for return.

See our full Return Policy here.

Frequently Asked Questions

What's the difference between the 5th Gen and 4th Gen?

The 5th Gen MRCOOL DIY® Mini Split offers several key upgrades over the 4th Gen, focusing on efficiency, advanced technology, and eco-friendliness.

Here’s what’s new with the 5th Gen:

  • Next-Gen R-454B Refrigerant: A more environmentally friendly refrigerant with lower global warming potential (GWP), compliant with the latest HVAC regulations.
  • Higher Energy Efficiency: Improved SEER2 ratings for greater energy savings and optimized performance.
  • Enhanced System Reliability: Upgraded components for better heating and cooling performance.

For a full breakdown, check out our blog.

Can I install it myself, or do I need a professional?

The MRCOOL DIY system is designed for homeowners and doesn’t require HVAC tools. You can install the indoor and outdoor units yourself using the pre-charged Quick Connect® lines. However, a licensed electrician is required for the electrical hookup to ensure safety and code compliance.

Does it work in cold weather?

Yes. MRCOOL 5th Gen systems feature low-ambient heating and can provide reliable heat even when outdoor temperatures drop to around 5°F.

How do I know what BTU size I need for my rooms?

A general rule of thumb is 20 BTU per square foot of space. Here's a rough guide:

  • 6,000 BTU = 100 - 150 sq ft
  • 9,000 BTU = 150 - 350 sq ft
  • 12,000 BTU = 351- 500 sq ft
  • 18,000 BTU = 501 – 750 sq ft
  • 24,000 BTU = 751 – 1,000 sq ft
  • 36,000 BTU = 1,001 - 1,500 sq ft

Some additional factors may impact performance such as insulation, ceiling height, sun exposure and the number of appliances in the room. For assistance, contact our Product Experts.

Does it heat as well as cool?

Yes. All 5th Gen models are heat pumps, providing both heating and cooling for year-round comfort.

Is it Wi-Fi compatible?

Yes. The MRCOOL SmartHVAC app allows smartphone control and works with Amazon Alexa and Google Assistant.

What is the warranty?

The MRCOOL 5th Generation DIY Mini-Split systems offer the following warranty coverage:

  • 7-Year Compressor Replacement Warranty: This warranty ensures that if the compressor fails within the first seven years, MRCOOL will provide a replacement.
  • 5-Year Parts Warranty: This warranty covers all parts of the system for five years from the date of purchase.

View Warranty Document here.

BTU Coverage Guide

6,000 BTU
100-150 sq ft
9,000 BTU
151-350 sq ft
12,000 BTU
351-500 sq ft
18,000 BTU
501-750 sq ft
24,000 BTU
751-1,000 sq ft
36,000 BTU
1,001-1,500 sq ft

Some additional factors may impact performance such as insulation, ceiling height, sun exposure and the number of appliances in the room. For assistance, contact our Product Experts.

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