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MRCOOL DIY 2 Zone 18k BTU 9K + 9K Complete System

MRCOOL DIY 2-Zone 18k BTU 6K+6K Air handler

MRCOOL DIY 2 Zone 18k BTU 9K + 9K Air handler side

MRCOOL DIY 2 Zone 18k BTU 9K + 9K Condenser

MRCOOL DIY 2 Zone 18k BTU 9K + 9K Condenser Side

MRCOOL DIY 2 Zone 18k BTU 9K + 9K Condenser rear

MRCOOL DIY 2 Zone 18k BTU 9K + 9K Line Set

MRCOOL DIY 2 Zone 18k BTU 9K + 9K Line Set Connector

MRCOOL DIY 2 Zone 18k BTU 9K + 9K remote

Brand: MRCOOL

MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 23.9 SEER2 (9K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V

SKU DIYM2-99-18-16

Regular price: $3,641.51
Sale price: $2,619.00

You save $1,022.51

Line Set for 9K Air Handler #1

Line Set for 9K Air Handler #2

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Free & Fast Shipping

We offer fast, relaible & free shipping on all orders within the contiguous U.S. Orders are typically processed within 1–2 business days, with most deliveries arriving in 5–9 business days, depending on the product and destination. Larger items may ship via freight and require a scheduled curbside delivery. Please ensure your shipping information is accurate at checkout. For complete details, please see our Shipping Policy or contact us by phone, email, or live chat.

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Find a lower price? Contact Us +1 (800) 212-8846 to match it!

See our Price Match Policy for full details.

Returns

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

Customer-initiated returns are subject to customer-paid return shipping and a 25% restocking fee. Defective or damaged products are not subject to a restocking fee.

For complete details, please see our Return & Refund Policy or contact us by phone, email, or live chat.

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Brand: MRCOOL

MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 23.9 SEER2 (9K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V

SKU DIYM2-99-18-16

Product Overview

Zones: 2

DIY Installation

Voltage: 208-230V

ENERGY STAR® Certified

What's Included

Complete Your System

MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 23.9 SEER2 (9K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V

MRCOOL Wall Mounting Bracket for 9K, 12K & 18K Mini Split Condensers

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

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

Total Price:

$2,906.00

This item: MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18,000 BTU 23.9 SEER2 (9K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V $2,619.00

MRCOOL Wall Mounting Bracket for 9K, 12K & 18K Mini Split Condensers $77.00 MRCOOL LineGuard 4.5" Complete Line Set Cover Kit - 12 ft $132.00 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 2-Zone 18,000 BTU 23.9 SEER2 (9K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V

Take full control of your indoor comfort with the MRCOOL DIY Multi-Zone 2-Zone 18,000 BTU (9K + 9K) a practical, high-efficiency solution designed to deliver powerful heating and cooling without the cost or complexity of professional installation.

Two Rooms, Customized Comfort: Independently heat or cool two separate areas, allowing personalized temperature control in every space.
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 23.9 SEER2 and heating performance up to 10.8 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	DIY 5th gen Multi-Zone Mini-splits
Zones	2
Refrigerant	R-454B
Line Sets	2 × Pre-charged Quick-Connect® line sets (As per selected length above)
Warranty	7-Year Compressor • 5-Year Parts • Extended Limited Lifetime Replacement*

Outdoor Unit — 18K (Qty: 1)

Model	DIY-MULTI3-18HP230D-O
Dimensions (W × D × H)	35.04" × 13.46" × 26.50"
Cooling Capacity	18,000 BTU
SEER2	23.9
EER2	13.0
Heating Capacity	18,000 BTU
HSPF2-4 / HSPF2-5	10.0 / 7.8
Outdoor Noise Level	60 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	16.0A
Max Fuse/Breaker	20.0A
Weight	101.63 lbs

Indoor Units — 9K (Qty: 2)

Model	DIY-09-HP-WMAH-230D25-O
Dimensions (W × D × H)	31.57" × 7.44" × 11.69"
Mounting Type	Wall mounted
Cooling Capacity	9,000 BTU per unit
Heating Capacity	9,000 BTU per unit
Coverage Area	400 sq. ft. per unit
Liquid Line Size	1/4"
Suction Line Size	3/8"
Weight	24.47 lbs per unit

Installation & Guides

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 2-Zone 18,000 BTU 23.9 SEER2 (9K + 9K) 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 2-Zone 18,000 BTU 23.9 SEER2 (9K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump - R454B - 230V

Product Overview

What's Included

Choose your Line Sets above!