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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 12K BTU 1 Zone Ductless Mini Split Air Conditioner - 5th Gen

by MRCOOL
Deals on 2+ units
$2,599.00
$2,599.00 - $2,599.00
$2,599.00
$2,359.00
$2,359.00 - $2,359.00
$2,359.00

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Energy Rebates & Bulk Pricing Available

SAVE BIG! Contact us for Bulk Pricing and Rebate Eligibility, or call us at (973) 206-7590.

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We accept all major credit cards, crypto and Paypal 0% credit plans. More details here.

Full Manufacturer’s Warranty

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

Effortless DIY install, smart control, and R-454B efficiency for heating and cooling rooms up to 550 sq ft all year long.

Take total control of your home’s heating and cooling with the MRCOOL DIY 5th Gen ENERGY STAR 12,000 BTU Single Zone Mini-Split System. Engineered for easy, tool-free installation, this high-efficiency ductless heat pump is the perfect climate solution for rooms up to 550 sq. ft. Featuring eco-friendly R-454B refrigerant, advanced inverter technology, and smart home integration, this system delivers powerful heating and cooling performance while reducing energy consumption and lowering utility costs.

Coverage Area

Please refer to this coverage chart to determine the required BTUs for the area you wish to cool or heat.

  • Square Feet: Up to 400 | BTU = 9K
  • Square Feet: Up to 550 | BTU = 12K
  • Square Feet: Up to 800 | BTU = 18K
  • Square Feet: Up to 1050 | BTU = 24K
  • Square Feet: Up to 1550 | BTU = 36K

Note about condenser sizes versus total air handler capacity: The total capacity of the combined air handlers may exceed the capacity of the condenser in certain 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 12K BTU Single Zone Mini Split Complete System
  • 25ft. Line Set 115V

Download Resources

Specifications

Mini-Split Condenser (Outdoor Unit)


Model: DIY-12-HP-C-115D25-O

Tonnage: 1 Ton

Cooling Capacity (BTU): 12,000

Heating Capacity (BTU): 12,000

SEER2: 23.5

EER2: 12.5

HSPF2-4: 10.2

Voltage (V): 115

Phase / Cycle: 1 / 60

Max Fuse Breaker (A): 20

Min Circuit Ampacity (A): 18

Refrigerant Type: R-454B

Decibel Rating (dBA): 54

Max Line Set Length (ft): 82

Line Sizes: 1/4" Liquid, 3/8" Suction

Inverter: DC Rotary Compressor

WiFi/App Compatibility: Yes (iOS/Android)

Certifications: Energy Star, AHRI, UL, ETL

Warranty: 5-Year Parts / 7-Year Compressor / Extended Lifetime (registered)

Mini-Split Air Handler (Indoor Unit)


Model: DIY-12-HP-WMAH-115D25-O

Tonnage: 1 Ton

Voltage (V): 115

Max Coverage Area: 550 sq. ft.

Decibel Rating (Low/High dBA): 18–43

Number of Speeds: 5

Oscillation: Yes

Filter Type: Reusable

Mount Type: Wall

WiFi/App Compatibility: Yes (iOS/Android + Remote)

Certifications: Energy Star, AHRI, UL, ETL

Warranty: 5-Year Parts / 7-Year Compressor / Extended Lifetime (registered)

Grow Light Central expert advice for indoor growing equipment

Who should use this mini-split?

  • Home growers managing larger grow tents or sealed grow rooms
  • DIY home users upgrading comfort in bedrooms, garages, or studios
  • Operators avoiding HVAC costs with a fully self-installable solution
  • Smart home users who want app, Alexa, or Google-based control
  • Energy-conscious setups aiming to reduce bills and environmental impact

Best applications

  • Climate control in grow spaces up to 550 sq ft with steady temps year-round
  • Tool-free DIY installs using Quick Connect lines and DIYPro armored cable
  • Stable grow environments supported by inverter tech and louver memory
  • Smart automation with voice assistant support and app scheduling
  • aEfficient heating and cooling using R-454B refrigerant and ENERGY STAR rating

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 grow equipment solution provider connecting you to 100+ brands and 60+ suppliers trusted and used in the best grow facilities across the country.

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.

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.