DIY-MULTI2-18HP230C MrCool DIY 4th Gen 2-Zone Mini Split Condenser, 21 SEER Rating

Regular price $1,372.00 USD
Regular price Sale price $1,372.00 USD
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Shipping calculated at checkout.

Benefits & Features

✅ Up to 21 SEER: Maximize energy efficiency for optimal performance.
✅ DIY-Friendly Installation: Seamlessly install with MrCool’s Quick Connect Line Sets, designed for hassle-free DIY projects.
✅ Energy-Efficient DC Inverter: Achieve cost-effective operation without compromising performance.
✅ 7-Year Compressor Warranty: Experience lasting reliability with the assurance of a standard 7-year compressor warranty.
✅ App & Wifi Compatibility (iOS/Android): Enjoy convenient control at your fingertips with compatibility on both iOS and Android devices.


Item Dimensions: 35.04" (W) x 13.46" (D) x 26.50" (H)
Item Weight: 100.53 lbs
Item Color: White
Zone Capacity: Up to 2
Liquid Line Size: 1/4"
Suction Line Size: 1/2"
Refrigerant Volume: 65.26 oz
Line Set Length: 123 ft
Air Flow Capacity: 1,764.71 CFM
Cooling Capacity: 18,000 BTU
Heating Capacity: 19,000 BTU
SEER: 21
EER: 12.5
HSPF-4: 10.6
HSPF-5: 8.6
Phase: 1
Cycle: 60
Voltage: 208-230
Circuit Ampacity: 18A
Fuse Breaker (Max): 25A
Decibel Rating: 59 dBA
Minimum Ambient Cool: 5—122°F
Minimum Ambient Heat: -13—75.2°F
Compressor Motor Type: Twin-Rotary
Condenser Fan Motor: 750/600/500 RPM
Prop 65 Warning: YES

Crafted with precision, the 4th Generation MRCOOL® DIY 18K BTU 2-Zone Ductless Heat Pump Condenser sets the standard for cutting-edge heat pump technology. Made for efficiency and designed for DIY enthusiasts, this condenser boasts a remarkable 21 SEER efficiency rating. With the capability to heat even at -13°F, it ensures year-round comfort for your space. Boldly featuring MrCool’s patented Pre-Charged Quick Connect Line Sets, this condenser offers a quick and wrench-only installation by homeowners.

Line Sizes:

  • 1/4” , 1/2”
  • 3/8” , 5/8”


  • 24K Air Handler Adapter — (3/8", 5/8" Line Size)

Matchup this up with our MrCool DIY 4th Gen Multi-Zone Air Handlers: (9K up to 36K BTU/H cooling & heating capacity)

*Note: If all indoor units (air handlers) run simultaneously, their combined BTU output will not exceed the BTU rating of the outdoor unit (condenser).

Warning: This product can expose you to chemicals including Lead and lead compounds, which are known to the State of California to cause cancer or birth defects or other reproductive harm:


Install Manual,
Service Manual,
Remote Manual,
AHRI Certification,
Specification Sheet,
Multi-Zone Match Ups,

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Frequently Asked Questions about the DIY-MULTI2-18HP230C MrCool DIY 4th Gen 2-Zone Mini Split Condenser, 21 SEER Rating

What is a mini-split condenser?

A mini-split condenser is a key component in a ductless HVAC system, responsible for transferring heat between the indoor and outdoor units.

How does a mini-split condenser work?

The condenser compresses and circulates refrigerant, facilitating the transfer of heat or cooling between the indoor and outdoor units.

What is the purpose of the condenser in a mini-split system?

The condenser releases heat absorbed from the indoor air to the outside environment during the cooling process and vice versa for heating.

Are mini-split condensers energy-efficient?

Yes, mini-split condensers are known for their energy efficiency, often boasting high SEER (Seasonal Energy Efficiency Ratio) ratings.

Can I install a mini-split condenser on my own?

While some may opt for DIY installation, it's recommended to have a professional HVAC technician install the mini-split condenser for optimal performance.