MRCOOL DIY 5th Gen E Star 18K BTU Single Zone Mini Split Complete System with 25ft. Line Set 230V, DIY-18-HP-WM-230D25-O
$2,909.00
MRCOOL® 18k DIY 5th Generation Mini-split Air Handler & Condenser 230v
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Introducing the 5th Generation MRCOOL DIY 18K BTU Single Zone Mini-Split Air Handler, engineered to provide efficient heating and cooling for areas ranging from 500 to 750 square feet. Designed for effortless installation, this system includes a 25-foot QuickConnect line set and DIYPRO cable, eliminating the need for specialized tools or professional assistance. Advanced climate control features allow for easy customization using the wireless remote, SmartHVAC app, or voice commands. Built for energy efficiency and long-term performance, this unit is backed by an industry-leading warranty.
- Straightforward DIY Installation:Â No specialized tools or prior experience required for a seamless setup.
- QuickConnect Line Set:Â Pre-charged with R-454B refrigerant, enabling a vacuum-free installation process.
- Eco-Friendly Refrigerant:Â Uses R-454B refrigerant, which has a lower Global Warming Potential (GWP) compared to R-410A, minimizing environmental impact while maximizing efficiency.
- Durable DIYPRO Cable:Â Eliminates the need for traditional electrical conduit, providing enhanced protection against outdoor conditions and wildlife interference.
- Multiple Control Options:Â Adjust temperature and settings effortlessly with the included remote, SmartHVAC app (compatible with Apple and Android), or voice commands via Amazon Alexa and Google Assistant.
- Follow Me Function: Maintains consistent comfort by adjusting airflow based on the remote’s location.
- Dry Mode:Â Reduces excess humidity to improve indoor air quality and create a more comfortable environment.
- Corrosion-Resistant Design:Â Gold Fin condenser enhances durability, making it ideal for coastal areas.
- Comprehensive Warranty Coverage:Â Includes a limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty for added peace of mind.
- Certified Quality:Â Intertek-listed (5031495) to meet high safety and performance standards.
This unit is an excellent choice for homeowners seeking a reliable, energy-efficient climate control solution with a simple installation process and advanced comfort features.
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Product Overview
   DIY Installation    Â
  Wall Mounted                      Â
   Number of Zones: 1
  Voltage: 208 to 230 Â
  Outdoor Operating Temp (Cool): -13°F to 122°F   Â
  Outdoor Operating Temp (Heat): -13°F to 75.2°F
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What's Included
Air Handler

Condenser

Line Set

Wall Sleeve

Communication Wire

Remote Control

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Specifications and 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 – 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 20 A Min Circuit Ampacity 18 A 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 ReplacementNotes:
• If the original owner does not register the unit, warranty defaults to standard 5 year parts / 7 year compressor.
• The original, registered owner must be enrolled in the MrCool Care Program every year to qualify for the 7 year full unit replacement for compressor failure and lifetime compressor replacement. -
Coverage Area
Please refer to the coverage chart below to determine the required BTUs for cooling or heating your desired area:
- Square Feet: 180-375 | BTU: 9K (SKU: 12345)
- Square Feet: 376-500 | BTU: 12K (SKU: 12346)
- Square Feet: 501-750 | BTU: 18K (SKU: 12347)
- Square Feet: 751-1,000 | BTU: 24K (SKU: 12348)
- Square Feet: 1,001-1,500 | BTU: 36K (SKU: 12349)
Please note that additional factors such as insulation, ceiling height, and the number of appliances in the room may affect performance. For further assistance, please contact our Sales Team.
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Handling Line Sets
When installing your MRCOOL system, handle refrigerant lines carefully to ensure optimal performance and prevent damage.
Bending the Copper Lines: Maintain a minimum 4-inch bend radius and use smooth curves instead of sharp angles to protect the lines and ensure proper refrigerant flow.
Avoid Repeated Bending: Bending copper lines more than three times can harden and weaken them, increasing the risk of breakage. Handle with care and minimize adjustments.
For best results, use gradual bends and consult a licensed professional or our support team if needed.



















