The MRCOOL DIY 4th Gen 18K BTU Ductless Mini-Split Heat Pump System is a powerful, energy-efficient, and truly DIY-friendly solution for heating and cooling spaces up to 750 sq. ft. This system includes a pre-charged 25 ft. line set, eliminating the need for special tools or professional installation.

With a high-efficiency 22 SEER rating and Energy Star certification, this unit delivers year-round comfort while reducing energy costs. Whether you're upgrading your home, adding climate control to a new space, or replacing an outdated system, the MRCOOL DIY Mini-Split is the perfect choice for homeowners seeking convenience and performance.

✔ Key Features

✔ Easy DIY Installation

Pre-charged 25 Ft. Line Set – No vacuuming or special tools required.
User-Friendly Design – Install it yourself with basic tools and clear step-by-step instructions.
Significant Cost Savings – No need to hire an HVAC professional.

✔ Versatile Operating Modes

This system adapts to your needs with multiple comfort modes:

AUTO – Automatically switches between heating and cooling as needed.
HEAT – Provides efficient warmth during cold months.
COOL – Powerful cooling keeps your space comfortable all summer.
FAN-ONLY – Circulates air without heating or cooling.
DRY (Dehumidification) – Removes excess moisture for improved indoor air quality.
SLEEP – Adjusts temperature settings for maximum nighttime comfort and energy efficiency.

✔ Advanced Comfort Features

Follow Me Function – The temperature sensor in the remote ensures the system adjusts cooling and heating based on where you are in the room.
Smartphone Integration – Control your system from anywhere using the Smart HVAC app for iOS & Android.

✔ Extended Line Set Options

The system includes a standard 25 ft. pre-charged line set, but if your installation requires a longer reach, MRCOOL offers extended line set options. Each extended set includes:

Pre-charged refrigerant lines
Necessary control cables
DIY couplers for easy connection

These flexible installation options make it easy to customize your setup to fit your space.

✔ Warranty & Long-Term Reliability

MRCOOL offers an industry-leading warranty, giving you confidence in your purchase:

✔ Limited Lifetime Compressor Warranty (with registration)
✔ 7-Year Compressor Coverage
✔ 5-Year Parts Warranty

This comprehensive coverage ensures long-term system reliability, providing you with peace of mind.

Why Choose MRCOOL DIY?

True DIY Installation – Save thousands on labor costs.
Pre-Charged Quick Connect Line Set – No refrigerant handling required.
Energy Star Certified – Designed for maximum efficiency and cost savings.
Industry-Leading Warranty – Protects your investment for years to come.
USA’s Most Trusted Independent MRCOOL Dealer – MRCOOL DIY Direct provides expert support and fast nationwide shipping.

Order Your MRCOOL DIY 4th Gen Mini-Split Today!

Upgrade your home with a DIY-friendly, high-efficiency heating and cooling system that delivers unmatched performance and comfort. Shop now at MRCOOL DIY Direct – the #1 trusted source for MRCOOL products!

Specifications & Dimensions

General
Warranty	5-Year Replacement 7-Year Compressor	Series Name	DIY 4th gen Energy Star
Color	White	Type	DIY system

Dimensions
Air Handler Depth (Inches)	8.9	Height (Inches)	26.5
Air Handler Height (Inches)	13.19	Line-set Connection Size	1/4-in x 1/2-in
Air Handler Width (Inches)	42.52	Line-set Length	25-ft
Compressor Depth (Inches)	13.46	Maximum Coverage Area (Sq. Feet)	800
Compressor Height (Inches)	26.5	Weight (lbs.)	94.36
Compressor Width (Inches)	35.04	Width (Inches)	35.04
Cord Length (Feet)	25.0	Zone Capacity	Single
Depth (Inches)	13.46

18k BTU Mini Split Systems

MRCOOL DIY 4th Gen 18K BTU Ductless Mini-Split Heat Pump, 1.5 Ton, 22 SEER, w/ Wall Mount Air Handler & 25 Ft. Line Set (DIY-18-HP-WM-230C25)

MRCOOL DIY 5th Gen Easy Pro 18K BTU Single Zone Mini Split Complete System 230V with 16 ft. DIY Quick Connect Line Set and DIYPRO Cable (R-454B), EZPRO-18-HP-23016D-O