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MRCOOL DIY® 5th Gen Hyper Heat 18,000 BTU Single Zone Ceiling Cassette Mini Split System 230V, DIYHH-18-HP-CM-230D25

Model: DIYHH-18-HP-CM-230D25More from MRCOOL
$3,682.00
$3,682.00 $4,998.00
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Mount type: Ceiling

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 Hyper Heat 18,000 BTU Single Zone Ceiling Cassette Mini Split System 230V, DIYHH-18-HP-CM-230D25

$3,682.00
$3,682.00 $4,998.00

Free shipping
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Product Overview

  • DIY Installation

  • Voltage: 208-230V

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

Experience next-generation comfort with the MRCOOL® DIY® 18K BTU 208/230V Hyper Heat Single Zone Mini Split System, complete with the low-profile OuttaSight® Ceiling Cassette for a fully integrated, discreet climate solution. This high-performance system is designed for spaces up to 800 sq. ft., delivering reliable heating down to -22°F and efficient cooling up to 122°F for year-round comfort. The 25-foot DIY QuickConnect® line set arrives pre-charged with eco-friendly R-454B refrigerant, eliminating the need for vacuum pumps or HVAC tools, while the DIYPRO® armored cable ensures long-term protection. The ceiling cassette installs flush within the ceiling for a seamless look and optimized airflow without occupying wall space. With smartphone app control, voice assistant compatibility, and MRCOOL’s industry-leading warranty protection, luxury comfort has never been more accessible for DIY homeowners.

  • Complete Ceiling Cassette System: Includes the 18K Hyper Heat outdoor condenser paired with the OuttaSight® Ceiling Cassette for a space-saving, flush-mounted air delivery solution.
  • Low-Profile Cassette Design: Installs discreetly within the ceiling, preserving room aesthetics while delivering even air distribution and exceptional comfort.
  • Hyper Heat Performance: Provides strong heating capability down to -22°F and steady cooling up to 122°F for dependable comfort in any climate.
  • DIY® Installation: The patented No-Vac® QuickConnect® line set comes pre-filled with R-454B refrigerant, enabling homeowner installation without special tools or gauges.
  • Room Size Coverage: Ideal for efficiently conditioning spaces between 500–800 sq. ft., including open-concept areas, basements, living rooms, and large bedrooms.
  • 360° Airflow Delivery: The ceiling cassette distributes air evenly throughout the room, reducing hot and cold spots and improving overall comfort.
  • Quiet, Efficient Operation: Designed for minimal noise with enhanced airflow engineering to maintain comfort without disrupting the environment.
  • Gold Fin® Protection: Corrosion-resistant outdoor condenser coating provides durability for both coastal and inland installations.
  • DIYPRO® Armored Cable: Protects crucial wiring from weather, pests, and exterior wear for long-term reliability.
  • Smart Control Compatibility: Adjust comfort using the included remote, the SmartHVAC app, or voice commands through Amazon Alexa and Google Assistant.
  • Energy-Saving Features: Includes Auto Mode, Sleep Mode, Turbo, Programmable Timer, and Follow Me® technology for personalized comfort with optimized energy use.
  • Auto Restart: Automatically resumes operation after a power interruption to maintain continuous comfort.
  • Premium Warranty Coverage: Includes a 7-year compressor and 5-year parts warranty

SPECIFICATIONS & DIMENSIONS

  • DIMENSIONS
  • Condenser Dimensions: 35.04" W x 13.46" D x 26.5" H
  • Condenser Weight: 99.87 lbs
  • Air Handler Dimensions: 50.31" W x 13.19" D x 8.98" H
  • Air Handler Weight: 45 lbs
  • CAPACITY & PEFORMANCE
  • Maximum Zones: 1
  • Cooling Capacity: 18,000 BTU
  • SEER2: 21.2
  • EER2: 12.5
  • Heating Capacity: 18,000 BTU
  • HSPF2-4: 11
  • HSPF2-5: 8.5
  • Outdoor Noise Level: 58 dB(A)
  • Outdoor Operating Temperature: Cooling: -5°F to 122°F//Heating: -22°F to 75°F
  • ELECTRICAL REQUIREMENTS
  • Voltage: 208-230V
  • Phase: 1
  • Cycle: 60 Hz
  • Max Fuse Breaker: 25A
  • Min Circuit Ampacity: 19A
  • REFRIGERANT & PIPING
  • Refrigerant Type: R-454B
  • Refrigerant Volume: 52.21 oz
  • Liquid Line Size: 1/4"
  • Suction Line Size: 1/2"
  • Max Line Set Length: 75 ft.
  • FEATURES
  • Coverage Area: 500 to 800 sq. ft.
  • Inverter: Yes
  • Compressor Motor Type: Rotary
  • Auto Mode: Yes
  • Wifi Compatibility: Yes
  • App Compatibility: Yes
  • Works with IOS: Yes
  • Works with Android: Yes
  • CERTIFICATIONS & WARRANTY
  • Certifications: Energy Star Certified, UL Listed, CSA Certified, ETL Certified, AHRI Certified
  • Warranty: 7 Years Compressor // 5 Years Parts

INSTALLATION & GUIDES

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Brochure PDF
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Installation Manual PDF
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Performance Specifications PDF
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Warranty PDF
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AHRI Certification PDF
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Energy Guide Certification 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.

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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
J
Jim

Can I install a ceiling cassette (horizontally) in a wall?

Premium Home Source

Hi, thank you for getting in touch. No, the ceiling cassette must be installed horizontally in a ceiling and is not designed for vertical wall installation. For a wall installation, you would need a compatible wall-mounted air handler.

If you need more assistance, please contact our product experts at (800) 805-7102 or [email protected].