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MRCOOL Mini Split - 36,000 BTU 3 Zone Ductless Heating & Cooling Complete System - Covers Up To 1500 SQ. FT For 3 Rooms - 4th Gen - CEILING CASSETTE - 12k+12k+12k

SKU: DIYM336HPC05C28N/AAvailability : In StockIn StockOut of stock

Please select the appropriate line set lengths to complete your bundle.

Note: Line sets connect the indoor and outdoor units together, where the outdoor unit (condenser) supplies the indoor unit (air handler) with refrigerant.
Will not ship until [19041994]


Out of stock
  • Authorized Dealer
  • Free Shipping
  • 30-Day Return policy

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What Size MRCOOL Mini Split Do I Need?

Heat or cool three zones with the MRCOOL DIY 4th Gen Multi-Zone 36,000 BTU 21.5 SEER Ductless Heat Pump Split System - 12K + 12K + 12K. This DIY Series multi-zone product features easy installation that requires no special tools or training. You'll save thousands of dollars on installation and you can get the amazing air comfort of your dreams due to the condenser’s 36,000 BTU capacity. The three ceiling cassette air handlers (12,000 BTU + 12,000 BTU + 12,000 BTU) use the condenser's power to heat and cool up to 1,500 square feet. A heat pump by design, this ductless HVAC solution can run in reverse and pull in heat from the outdoors when in a heating mode. It comes with a 7 Year Compressor (Plus an optional lifetime compressor warranty), 5 Year Parts Manufacturer Warranty!

Package Includes:

  • MrCool 36K BTU 4th Generation DIY Ductless Heat Pump Condenser 21.5 SEER DIY-MULTI4-36HP230C
  • MrCool 12k BTU 4th Generation DIY Ceiling Cassette Air Handler - Works with Alexa, Google Assistant DIYCASSETTE12HP-230C25 (X3)
  • MrCool 1/4" x 1/2" Pre-Charged Lineset for DIY Mini Split Systems 9K, 12K & 18K Air Handlers (X3)


  • Energy Efficient. This multi zone condenser, when paired with select MRCOOL air handlers, is capable of producing an impressive 21.5 SEER efficiency rating.
  • Works In All Environments. The capability to continue to deliver heating performance when temperatures reach -13°F
  • Lifetime Warranty. For added peace of mind, this is the only condenser on the market that comes with a limited lifetime compressor warranty. Simply register into the MRCOOL Care Program to get the lifetime warranty!

Ceiling Cassette Air Handlers - Quantity 3 - 12K BTU + 12K BTU + 12K BTU

  • Large Coverage Area. Handlers cover an area up to 1500 sq. ft combined.
  • Versatile. Incredibly versatile and equipped with multiple operating modes, which include COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
  • Easy to Control. This unit also has the capability to be controlled by your Apple or Android smartphone through the use of the Smart HVAC app.
  • Convenient Installation. With its light and compact design, it can be installed easily to most interior walls with the included mounting plate.

Line Set, Quantity 3

  • Line sets connect the MRCOOL Condenser to the MR COOL Air Handlers. For Multi-Zone systems, one line set per indoor unit is required to ensure the system will function properly.
  • Pre-Charged. These line sets come pre-charged with the precise amount of R-410A refrigerant.
  • DIY & Save Money. This means the installation process can be performed without retaining the services of a certified technician - thus saving you money!

Additional Line Sets & Coupler

You’ll need to choose a line set for each air handler that you have, and the lengths you can choose are 16 feet, 25 feet, 35 feet and 50 feet.

If your line set length exceeds 50 feet, you will need a Quick Connect coupler kit, which allows you to link two pre-charged line sets for an extended length(the maximum line set length per air handler is 75 feet).


Model DIY-MULTI4-36HP230C
AHRI Number 207339194
UPC 810063869519
Avg Coverage Area 1,250 - 1,500 Sq Ft
Compressor Inverter
Cooling Capacity 3 Ton
Electrical Phase 1-Phase
Heat Pump Efficiency (HSPF) 11
Line Set Connection Type Quick Connect
Liquid Line Size 1/4 inch
Max Overcurrent Protection 45 amps
Primary Heating Capacity 35,001 - 40,000 BTU
Product Height (in) 31.89
Product Length (in) 16.14
Product Width (in) 37.24
Refrigerant R-410a
Cooling Efficiency 19 SEER and Above
Series DIY
Suction Line Size 1/2 inch
System Application Type Ductless Split Systems
Voltage 240
Warranty 5 Year Parts, 7 Year Compressor
Weight (lbs) 187.8300
Region Compatibility Nationwide

12k Air Handler

UPC 840255522205
Air Flow Direction Downflow
Configuration Ceiling Cassette
Blower Motor Variable Speed
Cooling Capacity 1 Ton
Electrical Phase 1-Phase
Line Set Connection Type Quick Connect
Liquid Line Size 1/4 inch
Max Overcurrent Protection 15 amps
Product Height (in) 8.98
Product Length (in) 50.31
Product Width (in) 13.19
Refrigerant R-410a
Series DIY
Suction Line Size 1/2 inch
System Application Type Ductless Split Systems
Voltage 240
Warranty 5 Year Parts
Weight (lbs) 88.8500


Model DIYXX-1412
Line Set Connection Type Quick Connect
Liquid Line Size 1/4 inch
Suction Line Size 1/2 inch
System Application Type Ductless Split Systems
Warranty None
Weight (lbs) 10.0000

Customer Reviews

Based on 13 reviews
Michael P.
Cool For The summer

I found the installation of the units to be simple and straightforward. The units work great and we are extremely happy with our purchase.

Gretchen J.
Easy self-install and works great!

Purchased 4 units for my rental properties and couldn't be happier. My porter installed them within a few days and couldn't be happier. Super comfortable and couldn't be happier!

Wilson D.
Heatwave Lifesaver

We were struggling with expensive heating oil and ineffective window ACs, which left us too cold in the winter and not cool enough in the summer. Then we discovered the MRCOOL. Easy to control through phone or remote and integrates well with Siri for home automation. The mini-split delivers quick and powerful heating and cooling, and it's more affordable than a central air system, offering significant savings on initial costs and energy bills. Plus, it's easy enough for anyone to install.
A big shout-out to Dream Kitchen & Home for their exceptional customer service. I was able to quickly chat with their team to get the necessary information making the entire process smooth and hassle-free.
So far, the MRCOOL untits have exceeded our expectations in every way. They're quiet, efficient, and affordable units that have significantly improved our home's comfort and energy efficiency. Highly recommended!

Edward H.
Great For Mini Homes

I'm a contractor who has installed many MRCOOL systems in mini homes. They are awesome units. Keeps the homes at a very consistent temperature and they are very quiet. Hardly hear them run.

Ian T.
Excellent price, great service

Installion went well, if you have a little experience you'll be fine.It cools very well and the multi zone is great to set individually. I havent seen how energy efficient it is yet But I would recommend this and I'm very happy.with it.


Order Confirmation: The customer must provide a valid e-mail address during the checkout process. All orders are subject to verification and approval. All approved orders will be accompanied by an e-mail confirmation from our secure payment server. All shipped orders will be followed by an e-mail confirmation including tracking number(s) and shipping carrier contact information.

Payment Methods: All major credit and debit cards, including VISA, MasterCard, Discover, American Express, Google Checkout, PayPal, Personal and business checks are drawn on U.S. funds, U.S. Postal Money Orders in U.S. dollars. We do not accept COD orders.

Credit Card Orders: The shipping address must be on file and confirmed by the credit card issuer, except for American Express orders, which must be shipped to the billing address only.


We understand the importance of making sure your order arrives fast & safely. We work with our brand partners to ensure that all orders are shipped in a timely and efficient manner. To ensure we are meeting the highest standards, we work with these partners to ship directly from their warehouses located all over the US. This allows us the most flexibility to deliver your items, so you can start building your dream home faster.


- Free Shipping on all orders delivered by FedEx Ground, FedEx Freight, or other comparable couriers.

- Large appliances ship via curbside shipping (Such as ranges, dishwashers, and refrigerators). This means the carrier will drop it off on your property but will not deliver inside your home, porch, garage, kitchen, etc.

- Smaller products and small appliances are shipped via FedEx Ground or similar courier. They will be dropped off at your home and no signature is required.

- All delivery dates listed on the website are estimates. Delivery dates are not guaranteed and subject to change based on courier shipping times, delivery appointment availability and warehouse processing times.

- Shipping includes one delivery attempt. If the delivery is not accepted and the customer requests a second, or further delivery attempts, the customer will pay a delivery fee that is set by the courier.

- Full insurance is included in all shipments.

- Change Shipping Address: Once an order is staged for shipping, or shipped, the address cannot be changed. In some cases we are able to change the shipping address, a fee will apply to cover the fee that is charged to Dream Kitchen & Home. This fee is determined by the courier, and out of our control. The average fee can range from $150-500+ depending on the courier.

Appliance Shipments via Freight Shipments / LTL 

  • Large appliances are shipped via Freight / LTL (Less-than-truckload).
    • Large appliances includes, but not limited to, ranges, refrigerators, dishwashers, grills, etc. 
  • The carrier will call to schedule a delivery appointment.  A person, 18-years or older, must be available at the time of delivery to sign and accept the shipment.
  • Additional charges may apply for reschedule deliveries, or if the shipment is refused without a valid reason. These rates are determined by the courier company and are out of our control.
  • Delivery Window: The courier will offer options to deliver your freight shipment.
    • If you are unable to accept delivery, the courier will return to sender, or begin charging a storage fee
    • If returned to sender, it will be treated as a return and a restocking fee will apply, as per our return policy.
    • If the customer requests a delivery date past the offered window, the courier will charge storage fees. Storage fees are to be paid by the customer. The average fee can range from $25-100/day depending on the courier and location. 
  • Any additional charges by the courier will be paid by the customer. These can occur when customers request to delay deliver, or asking for extra services from the courier. These are charged by the courier and out of our control. 
  • Refused Shipments: Shipments that are refused will be sent back to the warehouse and automatically treated as a return. A restocking fee will apply, as per our return policy found here.

Ground Shipments (Smaller Appliances and Smaller Items)

  • Smaller appliances and products will be shipped via FedEx ground or similar courier. 
  • Smaller appliances include, but not limited to, Microwaves, Range Hoods, etc. 
  • A signature will not be required and the courier will leave it on your property, typically at or near your front door

Tracking Numbers 

  • Tracking number(s) are provided via email within 1-2 business days* after the date of the order is placed, or after the warehouse processing date.
  • Items shipped via FedEx Ground, or similar courier, may take up to 2-4 business days after processing date.
  • Items shipped via FedEx Freight, or similar freight carriers, may take 3-5 business days after processing date

Shipping Areas:

  • Free shipping applies to the 48 continental/contiguous United States.
  • We do not ship to PO Boxes.
  • We do not ship to Alaska, Hawaii, Puerto Rico, Guam, Northern Marina Islands, United States Virgin Islands, any outlining mainland USA islands.

Damaged Packages

  • If your item arrived damaged - we are happy to arrange for a prompt replacement. Please email us with your order number and photos of the damage at cs@dreamkitchenandhome.com within 48 hours of receiving your order. After 48 Hours damage replacements may be denied. 
    • We will send you a return label for the damaged item, once it is picked up we will send the replacement to you.
  • Damaged appliances can only be exchanged or repaired if they are not installed. Once an appliance is installed, we cannot replace or repair due to damages
  • Prior to shipping, all products are individually inspected to verify that they leave our facility in brand-new condition. We re-package all of our products well so they arrive on your doorstep undamaged.
  • When you sign for the delivery, even if the package appears only slightly damaged, please write "Package Damaged." If the package looks significantly damaged, you may refuse delivery.  In this case, please notify us so that we can expect the return shipment. Once the package returns to us we will send you a new one right away.

  • If you have already accepted the package and notice missing or damaged parts, please contact us right away and we will ship you replacement parts free of charge.  We only have a 48-hour window to file a freight claim.

  • If you are missing any parts, we will ship them to you at our expense.


ZLINE Kitchen and Bath: 

3-7 Business Days (Ships Next Business Day) with Curbside Delivery

*All items are subject to a shipping fee.

We only ship to the contiguous 48 United States. We will work with private parties/shipping proxies for shipments outside our normal shipping range (including Alaska, Hawaii, Canada, etc) if pre-arranged by the customer. We will NOT honor returns for shipments outside of our normal shipping range.

*Orders shipped to zip codes 100## – 119## (New York), 200## – 205## (Washington DC) & 025## – 026## (Massachusetts) are subject to a freight shipping fee of $196 due to handling fees in those zips for large packages. 

Items that ship ground through FedEx will take 1-5 business days depending on your location from the shipping warehouse.

EcoFlow Shipping - Click here 

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