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MRCOOL’s 4th Generation DIY 18K Mini Split Heat Pump is the latest innovation in the only ductless mini-split system on the market intentionally engineered for simple, DIY installation. It’s the perfect solution for garages, workshops, sunrooms, RVs, trailers, or any space that lacks ductwork.

Available MRCOOL DIY Single Zone Mini Split Sizes:

  • 12,000 BTU – Covers up to 550 sq. ft.

  • 18,000 BTU – Covers up to 800 sq. ft.

  • 24,000 BTU – Covers up to 1,100 sq. ft.

  • 36,000 BTU – Covers up to 1,500 sq. ft.

The 4th Gen 18K DIY model offers improved efficiency, enhanced performance, and a streamlined installation process. It’s specifically designed so that anyone can install it in just a few hours—no special tools or training required. You’ll save significantly on installation costs and may also qualify for rebates through its ENERGY STAR® certification.

This 18,000 BTU system is ideal for spaces around 800 square feet, making it one of the most affordable and effective heating and cooling options on the market today. It comes with MRCOOL’s latest SmartHVAC Wi-Fi module, which allows for easy setup and full integration with Amazon Alexa, Google Assistant, and mobile devices on iOS or Android platforms.

What's Included with the MRCOOL DIY 18K 22 SEER 230V System:

  • 25 ft. pre-charged line sets with control wire for quick and easy installation

  • Remote control for simple operation

  • SmartHVAC Wi-Fi control module compatible with Apple, Android, Alexa, and Google Assistant

  • ENERGY STAR® certified for energy savings and rebate eligibility

  • 7-year compressor warranty and 5-year parts warranty

  • DC inverter and variable-speed compressor for reduced energy consumption

  • Refrigerant leak detection for system protection and long-term efficiency

  • Gold Fin condenser for corrosion resistance—ideal for coastal or humid environments

If you're looking for dependable, energy-efficient climate control without paying for professional installation, the MRCOOL DIY 18K is a smart, user-friendly solution built to deliver comfort and savings.

 

BRAND NAME MRCOOL
SERIES
DIY 4th Gen E STAR
MODEL
DIY-18-HP-WM-230C25
GTIN 00810035935167
UPC 810035935167
UNIT TYPE Mini Split
SHORT DESCRIPTION
MrCool E Star DIY 4th Gen 18k BTU Ductless Mini-Split Heat Pump Complete System 208-230V/60Hz
BULLET 1
Up to 22 SEER
BULLET 2
Gold Fin® condenser: corrosion-resistant coastal living - don't worry, our condenser is built to resist long term corrosion
BULLET 3
Variable-speed DC inverter compressor technology cuts operating costs
BULLET 4
R-410A environmentally friendly refrigerant
BULLET 5
Standard 7-year compressor/5-year parts warranty; register for limited lifetime compressor warranty
SEER 22
EER 12.5
HSPF
hspf4/hspf5 : 11.5/9
CFM
465.29/361.76/304.12
TONNAGE 1.5
COOLING CAPACITY 18000 BTU
HEATING CAPACITY 18000 BTU
VOLTAGE 208-230 V
PHASE 1
CYCLE 60 Hz
MAX FUSE BREAKER 30 A
MIN CIRCUIT AMPACITY 18 A
COLOR White
COLOR FAMILY White
RATED LOAD 0.25 A
MAX COVERAGE AREA Up to 750 sqft
ZONE CAPACITY 1
REFRIGERANT TYPE R-410A
REFRIGERANT VOLUME 56.44 oz
DECIBEL RATING 44.5/37/31
DECIBEL RATING LOW 31 dBA
DECIBEL RATING HIGH 44.5 dBA
OSCILLATION 4-W
INVERTER Yes
MIN AMBIENT COOL -13F - 122F
MIN AMBIENT HEAT -13F - 75F
LINE SET LENGTH 25ft
MAX LINESET LENGTH 98.42 ft
LIQUID LINE SIZE 1/4 in
SUCTION LINE SIZE 1/2 in
COMPRESSOR MOTOR TYPE Rotary
CONDENSER FAN MOTOR RPM 810/720
BLOWER MOTOR RPM 1120/950/700
AUXILIARY HEATER INCLUDED No
AUXILIARY HEATER AVAILABLE No
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
UL LISTED Yes
ENERGY STAR CERTIFIED Yes
AHRI CERTIFIED Yes
REGISTERED WARRANTY
Limited Lifetime Compressor
BASE WARRANTY
5-year Parts/7-year Compressor
BASE PARTS WARRANTY 5-year Parts
REGISTERED COMPRESSOR WARRANTY
Limited Lifetime Compressor
BASE COMPRESSOR WARRANTY
7-year Compressor
HAS BATTERIES Yes
CONTAINS ELECTRONICS Yes
CONTAINS CHEMICALS Yes
CONTAINS AEROSOL Yes
CONTAINS COMPRESSED GAS Yes
PROPOSITION 65 WARNING Yes
RESTRICTED STATES GU;PR;VI
BASE PARTS WARRANTY None
REGISTERED COMPRESSOR WARRANTY 7-year
BASE COMPRESSOR WARRANTY None
REGISTERED REMOTE WARRANTY 1-year
BASE REMOTE WARRANTY None
REGISTERED LABOR WARRANTY None
BASE LABOR WARRANTY None
HAS BATTERIES Yes
CONTAINS ELECTRONICS Yes
CONTAINS CHEMICALS Yes
CONTAINS AEROSOL Yes
CONTAINS COMPRESSED GAS Yes
PROPOSITION 65 WARNING No
RESTRICTED STATES GU, PR, VI
CONDENSER DEPTH 14.29 in
CONDENSER HEIGHT 27.64 in
CONDENSER WIDTH 33.27 in
CONDENSER WEIGHT 98.77
AIR HANDLER DEPTH 8.90 in
AIR HANDLER HEIGHT 13.19 in
AIR HANDLER WIDTH 42.52 in
AIR HANDLER WEIGHT 30.20 lbs
FREIGHT CLASS 250

 

Brochure for the DIY 4th Gen 18K Single Zone Mini Split

Install Manual for the DIY 4th Gen 18K Single Zone Mini Split

MRCOOL

MRCOOL | DIY 18K 18,000 BTU 22 SEER 4th Gen Ductless Mini Split Air Conditioner and Heat Pump 230V | DIY-18-HP-WM-230C25

SKU DIY-18-HP-WM-230C25
$2,956.00
$2,156.00

MRCOOL’s 4th Generation DIY 18K Mini Split Heat Pump is the latest innovation in the only ductless mini-split system on the market intentionally engineered for simple, DIY installation. It’s the perfect solution for garages, workshops, sunrooms, RVs, trailers, or any space that lacks ductwork.

Available MRCOOL DIY Single Zone Mini Split Sizes:

  • 12,000 BTU – Covers up to 550 sq. ft.

  • 18,000 BTU – Covers up to 800 sq. ft.

  • 24,000 BTU – Covers up to 1,100 sq. ft.

  • 36,000 BTU – Covers up to 1,500 sq. ft.

The 4th Gen 18K DIY model offers improved efficiency, enhanced performance, and a streamlined installation process. It’s specifically designed so that anyone can install it in just a few hours—no special tools or training required. You’ll save significantly on installation costs and may also qualify for rebates through its ENERGY STAR® certification.

This 18,000 BTU system is ideal for spaces around 800 square feet, making it one of the most affordable and effective heating and cooling options on the market today. It comes with MRCOOL’s latest SmartHVAC Wi-Fi module, which allows for easy setup and full integration with Amazon Alexa, Google Assistant, and mobile devices on iOS or Android platforms.

What's Included with the MRCOOL DIY 18K 22 SEER 230V System:

  • 25 ft. pre-charged line sets with control wire for quick and easy installation

  • Remote control for simple operation

  • SmartHVAC Wi-Fi control module compatible with Apple, Android, Alexa, and Google Assistant

  • ENERGY STAR® certified for energy savings and rebate eligibility

  • 7-year compressor warranty and 5-year parts warranty

  • DC inverter and variable-speed compressor for reduced energy consumption

  • Refrigerant leak detection for system protection and long-term efficiency

  • Gold Fin condenser for corrosion resistance—ideal for coastal or humid environments

If you're looking for dependable, energy-efficient climate control without paying for professional installation, the MRCOOL DIY 18K is a smart, user-friendly solution built to deliver comfort and savings.

 

BRAND NAME MRCOOL
SERIES
DIY 4th Gen E STAR
MODEL
DIY-18-HP-WM-230C25
GTIN 00810035935167
UPC 810035935167
UNIT TYPE Mini Split
SHORT DESCRIPTION
MrCool E Star DIY 4th Gen 18k BTU Ductless Mini-Split Heat Pump Complete System 208-230V/60Hz
BULLET 1
Up to 22 SEER
BULLET 2
Gold Fin® condenser: corrosion-resistant coastal living - don't worry, our condenser is built to resist long term corrosion
BULLET 3
Variable-speed DC inverter compressor technology cuts operating costs
BULLET 4
R-410A environmentally friendly refrigerant
BULLET 5
Standard 7-year compressor/5-year parts warranty; register for limited lifetime compressor warranty
SEER 22
EER 12.5
HSPF
hspf4/hspf5 : 11.5/9
CFM
465.29/361.76/304.12
TONNAGE 1.5
COOLING CAPACITY 18000 BTU
HEATING CAPACITY 18000 BTU
VOLTAGE 208-230 V
PHASE 1
CYCLE 60 Hz
MAX FUSE BREAKER 30 A
MIN CIRCUIT AMPACITY 18 A
COLOR White
COLOR FAMILY White
RATED LOAD 0.25 A
MAX COVERAGE AREA Up to 750 sqft
ZONE CAPACITY 1
REFRIGERANT TYPE R-410A
REFRIGERANT VOLUME 56.44 oz
DECIBEL RATING 44.5/37/31
DECIBEL RATING LOW 31 dBA
DECIBEL RATING HIGH 44.5 dBA
OSCILLATION 4-W
INVERTER Yes
MIN AMBIENT COOL -13F - 122F
MIN AMBIENT HEAT -13F - 75F
LINE SET LENGTH 25ft
MAX LINESET LENGTH 98.42 ft
LIQUID LINE SIZE 1/4 in
SUCTION LINE SIZE 1/2 in
COMPRESSOR MOTOR TYPE Rotary
CONDENSER FAN MOTOR RPM 810/720
BLOWER MOTOR RPM 1120/950/700
AUXILIARY HEATER INCLUDED No
AUXILIARY HEATER AVAILABLE No
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
UL LISTED Yes
ENERGY STAR CERTIFIED Yes
AHRI CERTIFIED Yes
REGISTERED WARRANTY
Limited Lifetime Compressor
BASE WARRANTY
5-year Parts/7-year Compressor
BASE PARTS WARRANTY 5-year Parts
REGISTERED COMPRESSOR WARRANTY
Limited Lifetime Compressor
BASE COMPRESSOR WARRANTY
7-year Compressor
HAS BATTERIES Yes
CONTAINS ELECTRONICS Yes
CONTAINS CHEMICALS Yes
CONTAINS AEROSOL Yes
CONTAINS COMPRESSED GAS Yes
PROPOSITION 65 WARNING Yes
RESTRICTED STATES GU;PR;VI
BASE PARTS WARRANTY None
REGISTERED COMPRESSOR WARRANTY 7-year
BASE COMPRESSOR WARRANTY None
REGISTERED REMOTE WARRANTY 1-year
BASE REMOTE WARRANTY None
REGISTERED LABOR WARRANTY None
BASE LABOR WARRANTY None
HAS BATTERIES Yes
CONTAINS ELECTRONICS Yes
CONTAINS CHEMICALS Yes
CONTAINS AEROSOL Yes
CONTAINS COMPRESSED GAS Yes
PROPOSITION 65 WARNING No
RESTRICTED STATES GU, PR, VI
CONDENSER DEPTH 14.29 in
CONDENSER HEIGHT 27.64 in
CONDENSER WIDTH 33.27 in
CONDENSER WEIGHT 98.77
AIR HANDLER DEPTH 8.90 in
AIR HANDLER HEIGHT 13.19 in
AIR HANDLER WIDTH 42.52 in
AIR HANDLER WEIGHT 30.20 lbs
FREIGHT CLASS 250

 

Brochure for the DIY 4th Gen 18K Single Zone Mini Split

Install Manual for the DIY 4th Gen 18K Single Zone Mini Split
$2,956.00
$2,156.00

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