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Free Shipping on most orders over $175 | Sales Tax in NJ only
Free Shipping on most orders over $175 | Sales Tax in NJ only

MRCOOL 3 Zone 18K BTU (6K+6K+6K) 23.9 SEER2 Ductless Heat Pump DIY 5th Gen

by MRCOOL
Original price $2,926.00 - Original price $2,926.00
Original price
$2,926.00
$2,926.00 - $2,926.00
Current price $2,926.00

Many other BTU combinations are available. Contact us at (973) 206-7590 for special requests.

Line sets not included in pricing. Purchase separately below.

Pre-order. Ships Early August.

🌿 Free shipping on $175+ orders in the USA

🌿 Canada, AK & HI: Add'l shipping charges

🌿 Price match guarantee, details here

Energy Rebates & Bulk Pricing Available

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

Cash Payment Discounts & Financing Options

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

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.

Compact and efficient comfort for three small zones with DIY setup, smart control, and ultra-high 23.9 SEER2 rating.

The MRCOOL DIY Multi-Zone 27,000 BTU Mini Split gives you complete control over the comfort in three separate rooms—without hiring an HVAC tech. With three 9K BTU air handlers (each covering up to 350 sq ft), this setup is ideal for bedrooms, home offices, or smaller open areas. It’s a smart choice for homeowners looking to save on labor costs, reduce utility bills, and enjoy quiet, efficient heating and cooling year-round.

Note: Pricing doesn't include the Line Sets. Available to purchase separately

Coverage Area

Please refer to this coverage chart to determine the required BTUs for the area you wish 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 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

  • Easy DIY Installation
  • Simple to Use
  • Multi-room Comfort
  • Energy Efficient DC Inverter
  • 100% Sealed System
  • Gold Fin Condenser
  • Eco Safe R-454B Refrigerant
  • Smartphone App Controls
  • Lifetime Technical Support
  • Follow Me Feature
  • Low Ambient Cooling

What's Included?

  • 1 x MRCOOL 18k DIY 5th Generation 3 Zone Multi-Zone Mini-Split Condenser 230v
  • 3 x MRCOOL 6k DIY 5th Generation Mini-Split Air Handler 230v

Download Resources

Who should use this mini-split system?

  • Apartment owners or small-space dwellers who want efficient, multi-room temperature control.
  • DIY users looking for a compact system that’s easy to install without specialized tools.
  • Small grow operators managing 3 micro zones with independent climate needs.
  • Energy-savvy homeowners seeking maximum SEER2 efficiency in compact spaces.
  • Smart home users wanting full app, Alexa, or Google Home integration.

Best applications

  • Small zone coverage with three 6K BTU units cooling or heating up to 200 sq ft each.
  • DIY-friendly installs using pre-charged Quick Connect lines with R-454B refrigerant.
  • Year-round comfort with heating, cooling, and dehumidification in small rooms.
  • Smart home automation with app control, voice commands, and programmable timers.
  • Quiet, efficient operation with sleep mode, filter alerts, and auto-restart after power outages.

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.

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