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MRCOOL 39,000 BTU 4-Zone DIY Ductless Mini Split Air Conditioner & Heat Pump System

MRCOOL 39,000 BTU 4-Zone DIY Ductless Mini Split Air Conditioner & Heat Pump System

Regular price $5,251.00
Sale price $5,251.00 Regular price $6,563.75
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SKUDIY-B-436HP09090912

Type4 Zone/Room

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PRODUCT DESCRIPTION

🔥 Only One Left! 🔥

MRCOOL 39,000 BTU 4-Zone DIY Ductless Mini Split Air Conditioner & Heat Pump System

Includes:

  • (1) 36K BTU 4th Gen Condenser

  • (3) 9K BTU Wall Mounted Air Handlers

  • (1) 12K BTU Wall Mounted Air Handler
    Line sets sold separately – choose your lengths above!


Revolutionize Home Comfort—No HVAC Pro Needed!

Step into the future of heating and cooling with the MRCOOL DIY 4-Zone Mini Split System, engineered for total comfort and true DIY installation. With MRCOOL's patented Pre-Charged Quick Connect Line Sets, this system is designed so you can install it yourself—no vacuum pump, gauges, or certified tech required. Just connect, power up, and chill.


✅ Why This System?

✔️ 36K BTU 4-Zone Condenser

  • DIY Installation Made Easy – Pre-charged line sets make it fast and frustration-free

  • 21.5 SEER2 Energy Efficiency – Slash your energy bills without sacrificing comfort

  • Heat Down to -13°F – Stay warm even in freezing temps

  • Gold Fin® Corrosion Protection – Built to last, even in coastal or humid environments

  • 7-Year Compressor & 5-Year Parts Warranty – Long-term peace of mind

✔️ (3) 9K BTU Wall Mounted Air Handlers

  • Covers 180–375 sq ft – Perfect for bedrooms, offices, or garages

  • Modes: COOL, HEAT, AUTO, DRY, SLEEP

  • SmartHVAC App Compatible – Control from anywhere using your phone or voice assistant

  • Lightweight & Compact – Easy to mount with a clean, modern look

  • Quick Connect Installation – Hook up and go

✔️ (1) 12K BTU Wall Mounted Air Handler

  • Covers 376–500 sq ft – Ideal for living rooms or larger spaces

  • Same great features as above: full-mode versatility, smart control, and simple install


💡 Please Note:

When all zones are operating simultaneously, total BTU output is shared and cannot exceed 36,000 BTU.


🛒 Why Buy from MRCOOL DIY Direct?

  • Trusted MRCOOL Independent Dealer

  • Full Factory Warranty on All Products

  • Real HVAC Support from Real People

  • Fast Shipping + Expert Customer Service

  • Family-Owned & Operated in the USA


📦 What’s in the Box:

  • (1) 36K BTU 4-Zone Outdoor Condenser

  • (3) 9K BTU Wall Mounted Air Handlers

  • (1) 12K BTU Wall Mounted Air Handler

  • Line sets sold separately – select your preferred lengths before checkout!


🏃♂️ Hurry – Only One System Left in Stock!
Order now and take control of your indoor climate like never before—with no contractor required.

Mini Split FAQ

 What size DIY mini-split do I need?

The important factors to consider are:
  • The Size of the Area to Heat / Cool (Square Feet)
  • Your Local Climate (is it extremely hot or cold for extended periods of time?)
  • Insulation (an uninsulated area with drafts will have vastly different requirements than a well insulated area)
Basic Sizing based on Square Footage alone:
  • 12k BTU = up to 500 square feet
  • 18k BTU = 450 to 750 square feet
  • 24k BTU = 700 to 1000 square feet
  • 36k BTU = 950 to 1500 square feet

 What is the max line set length that can be run on your units?

The max length depends on the unit that is being installed.

  • DIY Single Zone: 75ft
  • DIY 18k-48k Multi Zone Condensers w/ One Air Handler: 75ft

DIY Multi Zone Combined Total:

  • 2-Zone: 123ft
  • 3-Zone: 172ft
  • 4-Zone: 221ft
  • 5-Zone: 221ft

What is the operational temperature range for the DIY?

Multi-Zone:

  • The 4th Gen Multi-Zone 18k – 36k condensers operational range for
    heating is -13F to 75.2F (outside temperature), cooling is 5F to 122F
    (outside temperature).
  • The 4th Gen Multi-Zone 48k condensers operational range for
    heating is 5F to 75.2F (outside temperature), cooling is 5F to 122F
    (outside temperature).
  • However, indoors – at the thermostat – on Multi-Zone units the
    temperature range for cooling can be from 62F to 90F and heating from 32F to
    86F.

On the Single-Zone:

  • The 4th Gen Single Zone 12K – 24k condensers operational range for heating
    is -13F to 75F (outside temperature), cooling is -13F to 122F (outside temperature).
  • The 4th Gen Single Zone 36k condensers operational range for heating
    is 5F to 75F (outside temperature), cooling is 5F to 122F (outside temperature).
  • However, indoors – at the thermostat – on all Single Zone units the
    temperature range for cooling can be from 62.2F to 89.6F and heating from
    32F to 86F.