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Free Shipping on most orders over $175 | Sales Tax in NJ only
MRCOOL DIY Ductless Mini Split Air Conditioner - 5th Gen system showing both the indoor and outdoor units with connection pipes and accessories.

MRCOOL DIY 18K BTU 1 Zone Ductless Mini Split Air Conditioner - 5th Gen

by MrCool
Save $690.00 Save $690.00
$3,599.00
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$3,599.00
$2,909.00
$2,909.00 - $2,909.00
$2,909.00

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Energy Rebates & Bulk Pricing Available

SAVE BIG on your grow setup! Email or call us at (973) 206-7590. For rebates eligibility, click here.

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Get an additional 3% off when you pay by ACH, Money, or Zelle. Select your option at check out.

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Full Manufacturer’s Warranty

You buy it, we back it! Your purchase is fully covered with a manufacturer’s warranty. More details here.

Heat and cool up to 750 sq ft with R-454B efficiency, app + voice control, and zero-hassle DIY installation in hours.

Upgrade your home’s heating and cooling system with the 5th Gen MRCOOL DIY 18K BTU Single Zone Mini-Split Air Handler, designed for effortless DIY installation and year-round climate control in spaces ranging from 500 to 750 sq. ft. Engineered for efficiency, this system features advanced inverter technology, eco-friendly R-454B refrigerant, and smart home integration, ensuring superior comfort without the need for professional installation.

Coverage Area

Please refer to this coverage chart to determine how many BTUs are required for the area you would like to cool or heat.

  • Square Feet: 180-375 | BTU = 9K
  • Square Feet: 376-500 | BTU = 12K
  • Square Feet: 501-750 | BTU = 18K
  • Square Feet: 751-1,000 | BTU = 24K
  • Square Feet: 1,001-1,500 | BTU = 36K

Note about condenser sizes vs total of air handler capacity: The total capacity of the combined air handlers may exceed the capacity of the condenser in some configurations. While this provides more flexibility in your setup you will need to either shut off one of your air handlers (zones) or reduce the output of all zones.

Features

  • DIY Installation: Specifically designed for amateur installation. No special tools or training are required.
  • Smartphone App Control: Control via Apple or Android devices, using an internet connection.
  • Quick Connect: Patented lines for simple installation without specialized tools.
  • DIYPro Armored Cable: Includes future-proof cable, eliminating the need for electrical conduit.
  • Louver Position Memory: Air handler's horizontal louver resets to the same position after powering on.
  • Gold Fin Condenser: Corrosion-resistant condenser, ideal for coastal environments.
  • Digital Assistant Ready: Fully supports Google Assistant and Amazon Alexa out of the box.
  • Follow Me Function: Remote control tracks air temperature around you for optimal comfort.
  • Auto Restart: The system restarts automatically after a power outage.

What's Included?

  • MRCOOL DIY 5th Gen E Star 18K BTU Single Zone Mini Split Complete System
  • 25ft. Line Set 230V

Download Resources

Who should use this mini-split?

  • Home growers controlling climate in large tents or sealed grow rooms
  • DIY homeowners upgrading comfort in basements, lofts, or workshops
  • Energy-focused setups using R-454B for lower emissions and power bills
  • Smart home users automating temp control via app or voice command
  • Anyone needing year-round comfort in 500 to 750 sq ft without HVAC pros

Best applications

  • Large grow environments with consistent heating and cooling all year
  • Quick DIY installs with Quick Connect lines and armored cable
  • Precise grow control via louver memory and inverter tech stability
  • Remote climate access through app, Alexa, or Google Assistant
  • Low-maintenance builds with auto-restart, corrosion-resistant condenser, and Follow Me mode

Why Shop with Grow Light Central?

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

Grow Light Central is a cannabis equipment solution provider connecting you to 100+ brands and 60+ suppliers trusted and used in the best cannabis facilies across the country.

With years of cannabis growing experience, Anthony, the owner and operator, personally ensures every order is handled right. No passing you off, no runaround, just the expert service and advice you deserve.

Specifications

Cooling Capacity: 18,000 Btu/h

Heating Capacity: 18,000 Btu/h

EER: 13.7

SEER: 22.5

HSPF2-4: 11.5

HSPF2-5: 8.5

Max Coverage Area: Up to 800 sq. ft.

Indoor Noise Level: 54.5/44.5/40.5/30.5/19.0 dB(A)

Outdoor Noise Level: 58.5 dB(A)

Power Supply: 208-230V, 60Hz, 1Ph

Indoor Dimensions: 42.52 x 8.90 x 13.19 inches (1080 x 226 x 335 mm)

Outdoor Dimensions: 35.04 x 13.46 x 26.50 inches (890 x 342 x 673 mm)

Indoor Weight: 35.49 lbs (16.1 kg)

Outdoor Weight: 93.48 lbs (42.4 kg)

Refrigerant: R-454B, 44.80 oz

Piping Size: 1/4” (6.35 mm) liquid side / 1/2” (12.7 mm) gas side

FAQs

What is an AC with heat pump and why is it ideal for grow setups?

An AC with a heat pump provides both cooling and heating, allowing growers to maintain a stable environment year-round. It’s especially useful for handling seasonal shifts without switching equipment, ensuring consistent growth conditions from veg to bloom.

How do I size an AC with heat pump for my grow room?

You’ll need to factor in grow room size (cubic feet), lighting wattage, equipment heat output, and insulation. A rough rule is 3,500–5,000 BTUs per 1000W of lighting, but high-performance grows may require more. Proper sizing avoids overcooling or inefficiency.

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