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Brand: MRCOOL

MRCOOL DIY 5th Gen Multi-Zone 4-Zone 27,000 BTU 23 SEER2 (6K + 6K + 6K + 6K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V

SKU DIYM4-6666-27-16

Regular price: $5,730.66
Sale price: $3,928.00

You save $1,802.66

Line Set for 6K Air Handler #1

Line Set for 6K Air Handler #2

Line Set for 6K Air Handler #3

Line Set for 6K Air Handler #4

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Returns are accepted within 30 days of delivery for unused, uninstalled items in their original packaging.

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Brand: MRCOOL

MRCOOL DIY 5th Gen Multi-Zone 4-Zone 27,000 BTU 23 SEER2 (6K + 6K + 6K + 6K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V

SKU DIYM4-6666-27-16

Product Overview

Zones: 4

DIY Installation

Voltage: 208-230V

ENERGY STAR® Certified

What's Included

Complete Your System

MRCOOL DIY 5th Gen Multi-Zone 4-Zone 27,000 BTU 23 SEER2 (6K + 6K + 6K + 6K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V

MRCOOL LineGuard 4.5" Complete Line Set Cover Kit - 12 ft

MRCOOL Wall Mounting Bracket for 24K, 27K & 36K Mini Split Condensers

MRCOOL Outdoor Condenser Pad - 18 In. x 38 In. x 3 In.

MRCOOL Disconnect Switch & Electrical Whip Kit with 10 Gauge Wire for 9K, 12K, 18K, 24K & 27K Condensers

Total Price:

$4,399.00

This item: MRCOOL DIY 5th Gen Multi-Zone 4-Zone 27,000 BTU 23 SEER2 (6K + 6K + 6K + 6K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V $3,928.00

MRCOOL LineGuard 4.5" Complete Line Set Cover Kit - 12 ft $132.00 MRCOOL Wall Mounting Bracket for 24K, 27K & 36K Mini Split Condensers $121.00 MRCOOL Condenser Risers - Set of 2 $69.00 MRCOOL Outdoor Condenser Pad - 18 In. x 38 In. x 3 In. $71.00 MRCOOL Disconnect Switch & Electrical Whip Kit with 10 Gauge Wire for 9K, 12K, 18K, 24K & 27K Condensers $78.00

Overview

MRCOOL DIY 5th Gen Multi-Zone 4-Zone 27,000 BTU 23 SEER2 (6K + 6K + 6K + 6K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V

Take command of your indoor comfort with the MRCOOL DIY 4 Zone 27k BTU 6K+6K+6k+6k — a practical, high-efficiency solution built to deliver powerful heating and cooling without the cost or complexity of professional installation.

Four Rooms, Personalized Comfort: Independently heat or cool four separate spaces, so every room maintains its own ideal temperature.
Designed for True DIY Installation: Skip contractor scheduling and specialty tools — this system is engineered for straightforward homeowner installation using basic hand tools.
Fast, Clean Setup: Pre-charged Quick-Connect® line sets eliminate vacuuming and refrigerant handling, making installation simple and hassle-free.
High-Efficiency Performance: With cooling efficiency up to 23 SEER2 and heating performance up to 9.5 HSPF2-4, the system helps reduce year-round energy costs.
Cold-Climate Reliability: Built to maintain dependable heating performance in temperatures as low as -13°F.
Warranty Confidence: Backed by a 7-year compressor replacement warranty and 5-year parts coverage for long-term peace of mind.

Specifications

System Overview

System Type	Ductless Mini Split Air Conditioner & Heat Pump
Zones	4
Refrigerant	R-454B
Line Sets	4 × Pre-charged Quick-Connect® line sets
Warranty	7-Year Compressor • 5-Year Parts

Outdoor Unit — 27K (Qty: 1)

Model	DIY-MULTI4-27HP230D-O
Dimensions (W × D × H)	37.24" × 16.14" × 31.89"
Cooling Capacity	26,000 BTU
SEER2	23.0
EER2	12.0
Heating Capacity	26,000 BTU
HSPF2-4 / HSPF2-5	9.5 / 7.0
Outdoor Noise Level	61 dB(A)
Operating Temperature	Cooling: -13°F to 122°F • Heating: -13°F to 75°F
Electrical	208–230V • 1 Phase • 60Hz
Min Circuit Ampacity	23.0A
Max Fuse/Breaker	25.0A
Weight	140.2 lbs
Certifications	ENERGY STAR • AHRI • UL • ETL

Indoor Unit — 6K (Qty: 4)

Model	DIY-06-HP-WMAH-230D25-O
Dimensions (W × D × H)	31.57" × 7.44" × 11.69"
Mounting Type	Wall mounted
Cooling Capacity	6,000 BTU
Heating Capacity	6,000 BTU
Coverage Area	200 sq. ft.
Liquid Line Size	1/4"
Suction Line Size	3/8"
Operating Modes	Auto • Cool • Heat • Fan Only • Dry (Dehumidify) • Sleep
Weight	24.47 lbs

Installation & Guide

Brochure

Installation & Owner's Manual

Warranty

BTU Coverage Guide

6,000 BTU

up to 200 sq. ft.

9,000 BTU

up to 400 sq. ft.

12,000 BTU

up to 550 sq. ft.

18,000 BTU

up to 800 sq. ft.

24,000 BTU

up to 1,050 sq. ft.

36,000 BTU

up to 1,550 sq. ft.

Additional factors may affect performance, including insulation, ceiling height, sun exposure, local climate, and the number of appliances in the room. For assistance, contact our Product Experts.

Let customers speak for us

from 62 reviews

MRCOOL DIY 9,000 BTU 5th Gen Easy Pro 20.2 SEER2 Ductless Mini Split Heat Pump System - R454B - 115V

Christopher Po

Good seller fast shipping

Good seller fast shipping.

MRCOOL DIY 9,000 BTU 5th Gen Easy Pro 20.2 SEER2 Ductless Mini Split Heat Pump System - R454B - 115V

09/29/2026

MRCOOL DIY Select 18,000 BTU 17.3 SEER2 Ductless Mini Split System - R454B - 230V

Jeff Buser

It was very easy to install and the perfect size for what I needed.

MRCOOL DIY Select 18,000 BTU 17.3 SEER2 Ductless Mini Split System - R454B - 230V

09/24/2026

MRCOOL DIY Select 12,000 BTU 17.5 SEER2 Ductless Mini Split System - R454B - 115V

eddie cortes

cool cool cool

Very satisfied with Mr.Cool unit keeps my apt so cool that I have turn up the thermostat excelent customer service

MRCOOL DIY Select 12,000 BTU 17.5 SEER2 Ductless Mini Split System - R454B - 115V

09/09/2026

Anna

The shopping experience was seamless.

The shopping experience with The Living Outlet was seamless from start to finish. Our order arrived on time, everything was very well packed, and the entire process went smoothly. Before placing the order, I had a couple of questions about the system and wanted to make sure we were choosing the right option. Ryan was very helpful, knowledgeable, and took the time to answer our questions clearly, which made us feel much more confident about the purchase. The installation also went smoothly, and so far we are very happy with the system and how everything has worked out. It is always reassuring to purchase from a company that is responsive and helpful both before and after the sale. Overall, we had a great experience with The Living Outlet and are very satisfied with our purchase. Thanks, TLO!

The Living Outlet

09/04/2026

Anna

Works Great

The system works great and good value for the price.

MRCOOL DIY Select 12,000 BTU 17.5 SEER2 Ductless Mini Split System - R454B - 115V

09/04/2026

MRCOOL DIY 24,000 BTU 5th Gen Easy Pro 18.9 SEER2 Ductless Mini Split Heat Pump - R454B - 230V

Jason B.

Energy bills are noticeably lower, and the comfort level is much better compared to our old unit

MRCOOL DIY 24,000 BTU 5th Gen Easy Pro 18.9 SEER2 Ductless Mini Split Heat Pump - R454B - 230V

08/17/2025

MRCOOL DIY 12,000 BTU 5th Gen Easy Pro 19.5 SEER2 Ductless Mini Split Heat Pump System - R454B - 115V

Angela F.

This is the second MRCOOL we’ve purchased. The 12K fits our office perfectly. Couldn’t be happier.

MRCOOL DIY 12,000 BTU 5th Gen Easy Pro 19.5 SEER2 Ductless Mini Split Heat Pump System - R454B - 115V

08/17/2025

MRCOOL 18,000 BTU DIY 5th Gen Energy Star 22.5 SEER2 Ductless Mini Split Heat Pump System - R454B - 230V

Ethan W.

Cools fast, runs efficiently, but the packaging could be sturdier. Still, highly recommend.

MRCOOL 18,000 BTU DIY 5th Gen Energy Star 22.5 SEER2 Ductless Mini Split Heat Pump System - R454B - 230V

08/17/2025

MRCOOL 24,000 BTU DIY 5th Gen Energy Star 22.7 SEER2 Ductless Mini Split Heat Pump System - R454B - 230V

Amanda G.

Couldn’t be happier. Keeps our large bedroom perfectly cool, and I love controlling it with my phone.

MRCOOL 24,000 BTU DIY 5th Gen Energy Star 22.7 SEER2 Ductless Mini Split Heat Pump System - R454B - 230V

08/17/2025

MRCOOL Advantage 5th Gen 36,000 BTU Ductless Mini Split Heat Pump System R-454B - 230V

Kelly M.

Perfect system for a nursery. Runs quietly and keeps the temperature steady all night.

MRCOOL Advantage 5th Gen 36,000 BTU Ductless Mini Split Heat Pump System R-454B - 230V

08/17/2025

MRCOOL 18k DIY 5th Generation Mini-split Air Handler 230v R454B - DIY-18-HP-WMAH-230D25-O

James W.

Puts out plenty of cold air for our family room. Quiet enough that we can watch movies without distraction.

MRCOOL 18k DIY 5th Generation Mini-split Air Handler 230v R454B - DIY-18-HP-WMAH-230D25-O

08/17/2025

MRCOOL DIY 18,000 BTU 5th Gen Easy Pro 20 SEER2 Ductless Mini Split Heat Pump System - R454B - 230V

Brian J.

Perfect for our small apartment. Simple setup, great airflow, and very quiet.

MRCOOL DIY 18,000 BTU 5th Gen Easy Pro 20 SEER2 Ductless Mini Split Heat Pump System - R454B - 230V

07/29/2025

MRCOOL 12,000 BTU DIY 5th Gen Energy Star 23.5 SEER2 Ductless Mini Split Heat Pump System - R454B - 115V

Emily T.

Great system, but I wish the Wi-Fi app was a little more polished. Otherwise, no complaints.

MRCOOL 12,000 BTU DIY 5th Gen Energy Star 23.5 SEER2 Ductless Mini Split Heat Pump System - R454B - 115V

07/28/2025

Paul G.

Nice little unit. It’s not as powerful as the larger ones of course, but for a small room, it does the job well.

MRCOOL DIY 9,000 BTU 5th Gen Easy Pro 20.2 SEER2 Ductless Mini Split Heat Pump System - R454B - 115V

07/27/2025

Catherine S.

We’ve had this for a few months now, and I’m impressed with how well it heats in the winter too. Very versatile

MRCOOL DIY 24,000 BTU 5th Gen Easy Pro 18.9 SEER2 Ductless Mini Split Heat Pump - R454B - 230V

07/26/2025

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Store offers efficient HVAC systems with strong DIY installation support. Customers praise fast shipping, competitive pricing, and excellent product performance. Units deliver powerful cooling/heating, quiet operation, and energy savings. Installation is strai...

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MRCOOL DIY 5th Gen Multi-Zone 4-Zone 27,000 BTU 23 SEER2 (6K + 6K + 6K + 6K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V

Free & Fast Shipping

Price Match Guarantee

Returns

Authorized Dealer

Lifetime expert help

MRCOOL DIY 5th Gen Multi-Zone 4-Zone 27,000 BTU 23 SEER2 (6K + 6K + 6K + 6K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V

Product Overview

What's Included

Choose your Line Sets above!