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MRCOOL 18,000 BTU DIY Select Series 17.3 SEER2 Single Zone Black Wall Mounted Mini Split Heat Pump System with 11.5 ft. Line Set – R454B | 230V

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Model

DIYS-18-HP-B-230A11-O

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236291

Was $1,300.00
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Customize MRCOOL 18,000 BTU DIY Select Series 17.3 SEER2 Single Zone Black Wall Mounted Mini Split Heat Pump System with 11.5 ft. Line Set – R454B | 230V
18,000 BTU MRCOOL Single Zone Condenser - R454B
18,000 BTU MRCOOL Single Zone Condenser - R454B   + $1,207.14
16ft 1/4 x 1/2 Line Set for DIY 18K Indoor - R454B
21" Wall Mount Bracket
Cielo Breez Max Mini Split Thermostat with WiFi

Energy-Efficient Ductless Mini Split for Easy Installation and Year-Round Comfort

Enhance your home's comfort with the MRCOOL DIY Select Series Mini Split with an 11.5 ft. Quick Connect Line Set. Designed to heat and cool spaces up to approximately 1,000 sq. ft., this 18,000 BTU ductless system provides dependable performance while offering a simpler installation process than traditional HVAC systems.

Perfect for living rooms, primary bedrooms, home offices, finished basements, apartments, and other larger living areas, the Select Series pairs advanced inverter technology with DIY-friendly installation to deliver efficient, consistent comfort throughout the year.

Why Choose the Select Series

  • Simple DIY Installation: The included Quick Connect® pre-charged line set is designed to simplify installation without the need for vacuum pumps, refrigerant charging, or specialized HVAC tools.
  • Heating and Cooling All Year: The 18,000 BTU heat pump efficiently heats and cools rooms up to approximately 1,000 sq. ft., providing reliable comfort through every season.
  • Efficient Inverter Technology: With a 17.5 SEER2 rating, the inverter-driven compressor automatically adjusts performance to help reduce energy consumption while maintaining a consistent indoor temperature.
  • Low-Noise Operation: Designed to operate quietly, making it an excellent choice for living spaces where reduced sound levels help create a more comfortable environment.

11.5 ft. Quick Connect Line Set Included

The included 11.5 ft. Quick Connect pre-charged line set comes ready for installation, eliminating the need for refrigerant charging, vacuuming, or specialized HVAC equipment. This convenient design helps save time and makes DIY installation more manageable.

Smart Wi-Fi Control

Built-in Wi-Fi allows you to control your mini split from virtually anywhere using the SmartHVAC app on your compatible smartphone or tablet. Adjust temperatures, change operating modes, set schedules, and manage your home's comfort whether you're at home or on the go.

Dependable Cold-Weather Heating

Built to provide year-round performance, this heat pump delivers reliable heating in outdoor temperatures as low as -13°F. Advanced inverter technology continuously adjusts system output to help maintain a comfortable indoor climate during colder weather.

What’s Included

  • MRCOOL DIY Select 18,000 BTU Ductless Mini Split Outdoor Condenser (DIYS-18-HP-C-230A11-O)
  • MRCOOL DIY Select 18,000 BTU Ductless Mini Split Indoor Air Handler (DIYS-18-HP-B-WMAH-230A13-O)
  • 11.5 ft. Pre-Charged Quick Connect Line Set
  • 13-Foot Communication Cable
  • Drain Hose
  • Air Filter
  • Wireless remote control
  • Owner's Manual, Guides, and Other Documents

Recommended Accessories

  • 21" Wall Mount Bracket for Mini Split Systems
  • Wall Mounted Thermostat
  • Installation kit
  • • 3/4" x 6' Electrical Whip – SKU: 84138 • 60A Non-Fused Disconnect – SKU: 83335 • Surge Protector – SKU: ICM517 • CPS Charging Adapter – SKU: 87-AD87 • Telescoping Wall Sleeve – SKU: NFP-75
  • Additional line set options with a coupler
  • • Coupler- DIYCOUPLER-1412K75C • 16 ft - DIY16-1412-O • 25 ft - DIY25-1412-O • 35 ft - DIY35-1412C-O • 50 ft - DIY50-1412C-O

Warranty

MRCOOL offers a limited warranty of 10-Year Compressor / 7-Year Parts Warranty* when installed according to manufacturer guidelines.


See Why the MRCOOL DIY Select Series Is a Top DIY Mini Split

See why the MRCOOL DIY Select Series has become one of the most popular budget-friendly mini split systems on the market. In this video, you'll learn how the DIY Select combines energy-efficient inverter technology, pre-charged Quick Connect line sets, and simple homeowner-friendly installation to deliver reliable heating and cooling without the cost of traditional HVAC installation. Discover the key features, benefits, and smart comfort controls that make the MRCOOL Select Series an excellent solution for bedrooms, garages, workshops, additions, and other single-room applications.

18,000 BTU MRCOOL Single Zone Condenser - R454B

Deliver Powerful Heating and Cooling With an Easy-To-Install Outdoor Condenser Unit

Upgrade your comfort with the MRCOOL DIY 18,000 BTU Select Single Zone Mini Split Heat Pump Condenser —the outdoor unit is designed for year-round heating and cooling in spaces up to 1,000 square feet. Built for homeowners who want flexibility, performance, and easier installation, this condenser combines efficient performance with DIY convenience. Pairs effortlessly with compatible MRCOOL DIY Select indoor air handler(DIYS-18-HP-WMAH-230A13-O)

Key Features

  • Designed for DIY Installation — Comes with MRCOOL’s 11.5 ft pre-charged Quick Connect line set system to help simplify setup and reduce installation barriers.
  • Efficient Year-Round Comfort — Delivers dependable heating and cooling performance for living rooms, primary bedrooms, finished basements, and other larger living areas.
  • Quiet Outdoor Performance — Made for reliable comfort with low-noise operation that helps maintain a more enjoyable home environment.

Warranty

MRCOOL offers a limited warranty of 2-Year Compressor / 1-Year Parts Warranty* when installed according to manufacturer guidelines.

16ft 1/4 x 1/2 Line Set for DIY 18K Indoor - R454B

DIY16-1412-O 16ft 1/4 x 1/2 Lineset for DIY 18K Indoor - R454B

The MRCOOL DIY16-1412-O is a 16-foot pre-charged lineset designed for MRCOOL® DIY 18K indoor units using R-454B refrigerant. This lineset offers an easy-to-install, reliable solution that eliminates the need for vacuum pumps or refrigerant charging.

Featuring Quick Connect fittings, it allows for quick, tool-free connections between indoor and outdoor units. The durable insulation and corrosion-resistant copper tubing provide excellent thermal performance and long-lasting durability.

Key Features:

  • Length: 16 feet of pre-charged copper tubing
  • Line Sizes: 1/4 inch liquid line and 1/2 inch suction line
  • Refrigerant: Pre-charged with eco-friendly R-454B refrigerant
  • Compatibility: Compatible with MRCOOL DIY 18K indoor units
  • Connection Type: Quick Connect fittings for tool-free installation
  • Insulation: High-quality insulation to prevent condensation and improve energy efficiency
  • Durability: Built with corrosion-resistant materials for extended service life

This lineset is an ideal choice for extending or replacing refrigerant lines in MRCOOL® DIY mini-split systems, providing an efficient and hassle-free installation.

21" Wall Mount Bracket

This wall mount bracket is perfect for outdoor mini split condensers. The length of the the wall bracket arms are 21" long. The condensing unit is mounted onto the L-shaped brackets and fastened using the bolts and anti-vibration washers provided.

Features:

  • 21" Arm Length
  • Weight capacity of 220 lbs per arm
  • Bolts and anti-vibration washers included

No Return Policy

All sales of this product are final and are non-refundable.

Cielo Breez Max Mini Split Thermostat with WiFi

Introducing Cielo Breez Max, the ultimate smart thermostat for your mini-splits, designed to elevate your comfort with intelligent climate control. Transform your air conditioner into a smart powerhouse and manage your cooling or heating from anywhere using your phone. This award-winning device, available in black and white, prevents overheating or overcooling with AI-powered Comfy Max, while seamlessly detecting any mini-split brand for hassle-free setup.


Features:

  • Energy Savings
  • WiFi Connectivity
  • Weekly Schedule
  • Geofencing
  • Temperature Range Lock
  • Real-Time Notifications
  • HVAC Zoning

Weekly Schedule lets you set on and off periods throughout the week based on your needs.

Geofencing uses your smartphone's location to trigger actions in your system, such as turning the air conditioner on or off based on your proximity to home.

Temperature Range Lock ensures your air conditioner operates within a set temperature range for optimal comfort and efficiency.

Real-Time Notifications keep you informed with important updates, helping you manage your air conditioner better.

HVAC Zoning allows you to create customized temperature control zones by grouping multiple mini-split units.

The Cielo Breez Max offers innovative features and extraordinary performance, making it a perfect fit for any room air conditioner. Enjoy maximum energy savings and simplified home comfort with this advanced smart thermostat.

25ft 1/4 x 3/8 Line Set for DIY 6K, 9K & 12K Indoor - R454B 

DIY25-1438-O 25ft 1/4 x 3/8 Lineset for DIY 6K, 9K & 12K Indoor - R454B

The MRCOOL DIY25-1438-O is a 25-foot pre-charged line set engineered for easy installation with MRCOOL DIY 6K, 9K, and 12K indoor units that utilize R-454B refrigerant. This lineset offers an efficient, mess-free solution for both homeowners and professionals who want a clean and secure HVAC connection without the need for vacuum pumps or refrigerant handling.

Equipped with Quick Connect fittings, this lineset simplifies the installation process by providing a tight, reliable seal—eliminating the need for special tools. The pre-charged refrigerant lines and durable insulation deliver excellent performance and energy efficiency in a wide range of settings.

Key Features:

  • Length: 25 feet of pre-charged copper tubing
  • Line Sizes: 1/4 inch liquid line and 3/8 inch suction line
  • Refrigerant: Pre-charged with eco-friendly R-454B refrigerant
  • Compatibility: Works with MRCOOL DIY 6K, 9K, and 12K indoor units
  • Connection Type: Quick Connect fittings for tool-free installation
  • Insulation: High-quality insulation for optimized thermal performance and protection
  • Construction: Built with corrosion-resistant materials for long-term durability

Perfect for extending the installation distance or replacing an existing lineset, the DIY25-1438-O provides a flexible and user-friendly option for MRCOOL® mini-split systems. Its DIY design ensures users can achieve a professional-grade setup with minimal effort and maximum confidence.

Equipment Pad and Risers Kit

E Lite Condenser Pad and Risers

E Lite Condenser Pad

E Lite Condenser Pad is designed to provide solid support for air conditioning condensers. It's made from sturdy polypropylene, striking a balance between lightness and stability. Its robust design ensures a level ground without the need for extra components.

Key Features:

  • Reliable Support: Abundance of ridges for stable ground support.
  • Durable and Lightweight: Tough yet not excessively heavy, thanks to polypropylene construction.
  • Anti-Slip: The surface prevents slipping, and rounded edges enhance safety.
  • Simple Appearance: Gray color with size labels.
  • Versatile Use: Suitable for condensers, pipes, ducts, cables, and more.

E Lite Risers

E Lite Risers complement the Condenser Pad, allowing you to adjust your setup as needed. They are constructed from weather-resistant PVC for outdoor use.

Key Features:

  • Weather Resistance: Made from tough PVC for long-lasting performance.
  • Secure Setup: The track securely holds bolts in place.
  • Bolts Included: Each set comes with two bolts.
  • Strong Support: Capable of handling loads of up to 397 pounds.

E Lite Condenser Pad and Risers offer reliable support without any complications. They are built to last and deliver efficient performance. Consider E Lite for your support needs – it's a practical solution for your projects.

No Return Policy

All sales of this product are final and are non-refundable.

50ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor w/ DIY Pro Cable - R454B

DIY50-1412C-O 50ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor with DIY Pro Cable - R454B

The MRCOOL® DIY50-1412C-O is a 50-foot pre-charged lineset featuring an integrated DIY Pro Cable, designed for MRCOOL® DIY 9K, 12K, and 18K indoor units using R-454B refrigerant. This comprehensive lineset simplifies installation by combining refrigerant lines and power wiring into a single, easy-to-install assembly.

Equipped with patented Quick Connect® fittings, it allows for a secure, tool-free connection between indoor and outdoor units. The integrated DIY Pro Cable streamlines wiring, enhancing installation efficiency and safety. High-quality insulation and corrosion-resistant materials ensure long-lasting durability and optimal energy performance.

Key Features:

  • Length: 50 feet of pre-charged copper tubing
  • Line Sizes: 1/4 inch liquid line and 1/2 inch suction line
  • Refrigerant: Pre-charged with eco-friendly R-454B refrigerant
  • Compatibility: Compatible with MRCOOL® DIY 9K, 12K, and 18K indoor units
  • Connection Type: Quick Connect® fittings for easy, tool-free installation
  • Pro Cable: Integrated DIY Pro Cable for simplified wiring and enhanced safety
  • Insulation: High-quality insulation to improve energy efficiency and prevent condensation
  • Durability: Built with corrosion-resistant materials for extended service life

This 50-foot lineset with integrated DIY Pro Cable is ideal for longer installations, providing a reliable and convenient solution for MRCOOL® DIY mini-split systems.

More Information
MRCOOL DIY 18,000 BTU Select Single Zone Mini Split Heat Pump Condenser – R454B | 230V
FeatureSpec
SKUDIYS-18-HP-C-230A11-O
Refrigerant Charge2.18 lbs (Pre-Charged for 11.5ft Line Set)
Weight (in lbs)82.23
AHRI Certificate Number218004486
Brand/ManufacturerMRCOOL
UPC840255595681
Cooling BTU17,000 BTU
Heating BTU18,000 BTU
Decibel Level (dBA)55 dBA
Energy StarYes
RefrigerantR454B
HSPF28.5
SEER2 (Efficiency)17.3
EER29
Liquid Line1/4"
Suction Line1/2"
Electrical208/230V | 1 Phase | 60Hz
Max Breaker Size20 Amps
Min. Breaker Size15 Amps
BTU/Tonnage18,000 BTU/1.5 Ton
Mini Split TypeWall Mounted
Min/Max Outdoor Temp for Heating-13°  - 75° F
Min/Max Outdoor Temp for Cooling-13° - 122° F
Zone CompatibilitySingle Zone
Height21.85"
Width30.12"
Depth11.93"
Warranty2-Year Compressor / 1-Year Parts Warranty* when installed according to manufacturer guidelines
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
MRCOOL DIY 18,000 BTU Select Single Zone Black Wall Mounted Mini Split Air Handler – R454B | 230V
FeatureSpec
SKUDIYS-18-HP-B-WMAH-230A13-O
Weight (in lbs)44.97
Brand/ManufacturerMRCOOL
UPC840255595667
ControllerIncluded
Cooling BTU17,000 BTU
Heating BTU18,000 BTU
Decibel Level (dBA)18.5 - 46.5 dBA
RefrigerantR454B
Liquid Line1/4"
Suction Line1/2"
Electrical208/230V | 1 Phase| 60Hz
BTU/Tonnage18,000 BTU/1.5 Ton
Mini Split TypeWall Mounted
Zone CompatibilitySingle Zone
Height12.64"
Width38.23"
Depth8.98"
Warranty1 Year Parts 2 Year Compressor
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
25ft 1/4 x 3/8 Line Set for DIY 6K, 9K & 12K Indoor - R454B 
FeatureSpec
SKUDIY25-1438-O
Weight (in lbs)10.4
Brand/ManufacturerMRCOOL
UPC605468000724
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 3/8
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
50ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor w/ DIY Pro Cable - R454B
FeatureSpec
SKUDIY50-1412C-O
Weight (in lbs)26.7
Brand/ManufacturerMRCOOL
UPC605468409282
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 1/2
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
35ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor w/ DIY Pro Cable - R454B
FeatureSpec
SKUDIY35-1412C-O
Weight (in lbs)18.3
Brand/ManufacturerMRCOOL
UPC605468447246
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 1/2
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
16ft 1/4 x 1/2 Line Set for DIY 18K Indoor - R454B
FeatureSpec
SKUDIY16-1412-O
Weight (in lbs)8.8
Brand/ManufacturerMRCOOL
UPC605468375099
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 1/2
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
21" Wall Mount Bracket for Mini Split Systems
FeatureSpec
SKU230-B2L
Weight (in lbs)9.2
Brand/ManufacturerOnline Supply
UPC0095247127436
Length40"
Height3"
Width6"
Safety InformationPROPOSITION 65 WARNING
E Lite Equipment Pad and Risers Kit 18" x 38" x 3"
FeatureSpec
SKU87762 / EL1838-3
Weight (in lbs)25
Brand/ManufacturerOnline Supply
UPCna
Height3"
Width18"
Depth38"
Safety InformationPROPOSITION 65 WARNING
Cielo Breez Max Mini Split Thermostat with WiFi
FeatureSpec
SKUBM101WA
Weight (in lbs)1
Brand/ManufacturerCielo
UPCna
ElectricalMicro USB with Standard Plug
Height4.25"
Width4.25"
Depth1"
Warranty1 Year Full Replacement
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
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Why Choose MRCOOL?

MRCOOL mini split systems combine innovative design with advanced manufacturing to deliver efficient, reliable comfort wherever you need it. Built with cutting-edge technology, these systems ensure optimal performance and flexibility for any space.

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