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MRCOOL DIY 5th Gen 18K BTU Single Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump with 25 ft. Install Kit, DIY-18-HP-CASS-230D25-O

DIY-18-HP-CASS-230D25-O

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What's Included

18K BTU Condenser

Quantity: 1

18K BTU Ceiling Cassette

Quantity: 1

25ft. Pre-Charged Line Set

Quantity: 1

Remote Control

Quantity: 1

The MRCOOL 5th Generation DIY Mini Split System offers an 18K BTU Single Zone Condenser, an 18K BTU Ceiling Cassette Air Handler, a 25-foot Pre-Charged Lineset, and a Remote Control. The standout feature? You can handle the installation on your own with ease.

Package Includes:

  • MRCOOL DIY 5th Gen 18K BTU Heat Pump Condenser (Model: DIY-18-HP-C-230D25-O): Boasting an impressive 22.5 SEER rating, this unit comes with a 25-foot line set.
  • MRCOOL DIY Series 18K BTU Ceiling Cassette (Model: DIYCASSETTE18HP-230D25-O): Designed for optimal air distribution and low-profile installation.

Condenser (18K BTU, Qty: 1):

  • Energy Efficiency: This single-zone condenser, when paired with compatible MRCOOL air handlers, achieves an outstanding 22.5 SEER2 rating, optimizing energy savings.
  • Reliable Performance: Delivers consistent heating even in extreme conditions, functioning efficiently at temperatures as low as -22°F.
  • Lifetime Warranty: The only condenser in its class to offer a limited lifetime compressor warranty when registered with the MRCOOL Care Program, providing long-term peace of mind.

Air Handler (18K BTU, Qty: 1):

  • Extended Coverage: Effectively manages areas up to 800 square feet.
  • Operational Flexibility: Offers multiple modes, including COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP, ensuring year-round comfort.
  • Sleek Installation: Its low-profile design allows for discreet installation, blending seamlessly into any room.
  • Hassle-Free Setup: Designed for easy installation between joists with 16" centers, including pre-manufactured I-joists.
  • Accessible Maintenance: The Elevation function on the remote or smart controller lowers the filter panel, enabling simple access for air filter maintenance.

Line Set (25 ft., Qty: 1):

  • Pre-Charged: The copper line set comes pre-charged with R-410A refrigerant, simplifying the installation process.
  • DIY Installation: No need for a certified technician, allowing you to save on installation costs while ensuring a professional result.

This system is engineered for energy efficiency, versatility, and ease of installation—perfect for the DIY enthusiast seeking professional-grade performance.

Accessories

System Details

Coverage Area Guide

6,000 BTU

100 - 150 square feet

9,000 BTU

151 - 350 square feet

12,000 BTU

351 - 500 square feet

18,000 BTU

501 - 750 square feet

24,000 BTU

751 - 1,000 square feet

36,000 BTU

1,001 - 1,500 square feet
Note: BTU requirements may vary based on factors like insulation, ceiling height, sun exposure, appliances, and occupancy. Contact our team for personalized assistance.

Frequently Asked Questions

The 5th Generation MRCOOL DIY Mini Splits bring a host of cutting-edge advancements over their 4th Gen predecessor, prioritizing energy efficiency, innovative technology, and environmental sustainability.

Discover what’s new in the 5th Gen:

  • Eco-Conscious R-454B Refrigerant: A new refrigerant with a reduced global warming potential (GWP), aligning with the latest HVAC industry standards.
  • Superior Energy Savings: Elevated SEER2 ratings for enhanced efficiency and optimized performance for lower energy costs.
  • Improved Durability and Performance: Upgraded internal components for a more reliable and effective heating and cooling system.

The DIY E Star and DIY Easy Pro are the two lines of do-it-yourself mini splits MRCOOL offers, each with its own list of benefits:

DIY E Star Series

  • Efficiency: Up to 23.6 SEER2, 11.5 HSPF2-4
  • Coverage: Up to 1,550 sq. ft.
  • Sizes & Price: 9K ($2,329), 12K ($2,359), 18K ($2,909), 24K ($3,329), 36K ($3,769)
  • Features: Energy Star certified (9K-24K), 25 ft. line set, R-454B refrigerant
  • Warranty: 5-yr parts, 7-yr compressor
  • Best for: Larger spaces, energy savings, rebates

EasyPro Series

  • Efficiency: Up to 20.2 SEER2, 9.3 HSPF2-4
  • Coverage: Up to 1,050 sq. ft.
  • Sizes & Price: 9K ($1,569), 12K ($1,649), 18K ($1,827), 24K ($2,149)
  • Features: 16 ft. line set, R-454B refrigerant, no Energy Star
  • Warranty: 2-yr parts, 1-yr compressor
  • Best for: Smaller spaces, budget installs

The MRCOOL DIY systems are designed with the homeowner's convenience in mind. You can easily set up the indoor and outdoor units without any specialized HVAC tools by using the pre-charged Quick Connect lines. For safety and compliance with local codes, a licensed electrician must handle the electrical installation.

Yes! All MRCOOL mini splits are heat pump systems that offer both heating and cooling.

The MRCOOL 5th Generation single zone mini split systems will deliver dependable heating performance in temperatures as low as -22°F.

As a general guideline, plan for 20 BTU per square foot of space. Here’s a quick reference:

  • 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

Do keep in mind that factors like insulation quality, ceiling height, sun exposure, heat from appliances, and occupancy may affect performance. For personalized guidance, reach out to our team.

Yes! The MRCOOL 5th Gen mini split systems can be controlled remotely via the MRCOOL Smart HVAC App and can also be paired with Google Assistant and Amazon Alexa.

The MRCOOL 5th Generation DIY E Star Mini-Split systems come with MRCOOL's longest mini split warranty protection:

  • 7-Year Compressor Replacement Warranty: If the compressor fails within seven years, MRCOOL will supply a replacement.
  • 5-Year Parts Warranty: All system components are covered for five years from the purchase date.

The MRCOOL 5th Generation DIY Easy Pro Mini Split systems, on the other hand, come with a shorter warranty:

  • 2-Year Compressor Replacement Warranty: If the compressor fails within two years, MRCOOL will supply a replacement.
  • 1-Year Parts Warranty: All system components are covered for one years from the purchase date.

Our Mission

Our Teams Focus

At MRCOOL HVAC Supply, we strive to deliver the highest quality residential and commercial HVAC systems. Our mission is to provide an exceptional customer experience by helping you find the perfect system to meet your needs while saving money. With units designed for easy installation and minimal reliance on licensed technicians, MRCOOL's products offer unparalleled convenience. Even for systems requiring professional installation, MRCOOL’s user-friendly designs ensure you can enjoy a climate-controlled environment quickly and efficiently.

At MRCOOL HVAC Supply, we strive to deliver the highest quality residential and commercial HVAC systems. Our mission is to provide an exceptional customer experience by helping you find the perfect system to meet your needs while saving money. With units designed for easy installation and minimal reliance on licensed technicians, MRCOOL offers unparalleled convenience. Even for systems requiring professional installation, MRCOOL’s user-friendly design ensures you can enjoy a climate-controlled environment quickly and efficiently.

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