MRCOOL DIY 5th Gen Multi-Zone 3-Zone 48,000 BTU 21.8 SEER2 (6K + 12K + 24k) Mini-Split Air Conditioner and Heat Pump 230V
The MRCOOL DIY 5th Gen 3-Zone System features one 6K, one 12K, and one 24K BTU air handler, providing a total of 42,000 BTU output. Together, they efficiently cover up to 1,750 sq. ft. (200 + 550 + 1,000), making it ideal for combining smaller rooms with a larger living space. Powered by a 48K BTU condenser, this system ensures dependable performance with additional capacity for long-term durability. With SEER2 ratings up to 21.8 and eco-friendly R-454B refrigerant, it offers efficient, sustainable comfort that homeowners can install themselves.
Key Features
-
Three-zone comfort: 6K + 12K + 24K air handlers (42,000 BTU total)
-
Combined coverage: up to 1,750 sq. ft.
-
Powered by 48K BTU condenser
-
High efficiency: 21.8 SEER2 / 10 HSPF2-4
-
Pre-charged Quick Connect® line sets
-
Smart control via SmartHVAC app, Alexa, and Google Assistant
-
Follow Me® remote sensors for personalized comfort
-
Quiet inverter-driven operation
-
Gold Fin® condenser for corrosion resistance
-
Certified: UL, ETL, AHRI
-
Warranty: 7-year compressor, 5-year parts
Specifications
Condenser (DIY-MULTI6-48HP230D-O)
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Capacity: 48,000 BTU
-
Voltage: 208/230V, 1 Phase, 60 Hz
-
SEER2: 21.8
-
HSPF2-4: 10
-
Max Line Set Length: 221.4 ft
-
Refrigerant: R-454B
-
Dimensions: 37.48" W x 52.48" H x 16.34" D
-
Weight: 223.77 lbs
- PROPOSITION 65 WARNING: Yes
Air Handler (6K BTU - DIY-06-HP-WMAH-230D25)
-
Coverage: Up to 200 sq. ft.
-
Dimensions: 31.57" W x 11.69" H x 7.44" D
-
Weight: 24.47 lbs
Air Handler (12K BTU - DIY-12-HP-WMAH-230D25)
-
Coverage: Up to 550 sq. ft.
-
Dimensions: 31.57" W x 11.69" H x 7.44" D
-
Weight: 29.76 lbs
Air Handler (24K BTU - DIY-24-HP-WMAH-230D25)
-
Coverage: Up to 1,000 sq. ft.
-
Dimensions: 42.52" W x 13.19" H x 8.90" D
-
Weight: 60.63 lbs
What’s Included
-
(1) 48K BTU Condenser
-
(1) 6K BTU Wall-Mounted Air Handler
-
(1) 12K BTU Wall-Mounted Air Handler
-
(1) 24K BTU Wall-Mounted Air Handler
-
(3) Wireless Remotes
-
(3) SmartHVAC Modules
-
Installation Manual
Required Accessories
- 3 X Pre-charged Quick Connect® Line Sets (Select line set length above for each air handler)
Manuals
30 Days Return Policy
How will I be notified when my order ships?
You’ll receive an email with your tracking details after your order has been shipped. This message will go to the email address you provided at checkout. If your order includes multiple items, they may ship separately and generate more than one tracking number. If you haven’t received tracking information within three days after placing your order, please contact us at info@thelivingoutlet.com
How soon will my order be shipped out?
Right after you place your order, you’ll receive a confirmation email showing it has been received and your payment has been pre-authorized.
We process the order within 2-3 business days. If an item is on backorder, we will void the pre-authorization and notify you by email.
What should I expect for shipping timeframes?
Shipping normally takes 5 to 7 business days. The weather, the carriers' schedules, or busy periods of the year may all affect how long it takes to deliver..
What is your policy for returns?
You have 30 days from the date you receive your order to request a return. Free return shipping and 15% restocking fees will be applied on all eligible returns. See our full Return Policy
Is it possible to cancel my order?
Yes—please reach out to us within 12 hours if you need to cancel. Orders that have already shipped can no longer be canceled, and our standard return policy will apply. You can contact us during business hours at 1-800-212-8846 or email us at info@thelivingoutlet.com
**Please note that custom-made products cannot be canceled or refunded once production has begun.
**Click here to read our Shipping Policy in detail.
**Click here to read our Return & Refund Policy in detail.
Click here to view the warranty policy in detail
If you have any questions about warranty, or need assistance with your product registration please contact us at info@thelivingoutlet.com
Price Match
We are committed to providing the best prices online. If you find a lower price on another site, let us know, and we’ll match it. We want you to be confident that you’re getting the best deal possible on the product you’re ordering.
CLICK HERE TO VIEW OUR PRICE MATCH POLICY
Have Questions?
If you have questions, please reach out:
Email: info@thelivingoutlet.com
Phone: 1-800-212-8846
Business Hours: Monday–Friday 9:00 AM–5:00 PM EST
Credit & Debit Cards
- Visa
- MasterCard
- American Express
- Discover
- Diners Club
Digital Wallets & Online Payments
- Shop Pay
- Apple Pay
- PayPal
- Google Pay
For more details, please visit our Payment Policy page.
Installment Options
You can also pay in installments using the following services:
- Shop Pay Installments
- Affirm
For more information, please visit our Financing page.
Need Help?
If you need assistance with payment options, reach out to us;
Email: info@thelivingoutlet.com
Phone: 1-800-212-8846
Business Hours: Monday–Friday 9:00 AM–5:00 PM EST
Description
MRCOOL DIY 5th Gen Multi-Zone 3-Zone 48,000 BTU 21.8 SEER2 (6K + 12K + 24k) Mini-Split Air Conditioner and Heat Pump 230V
The MRCOOL DIY 5th Gen 3-Zone System features one 6K, one 12K, and one 24K BTU air handler, providing a total of 42,000 BTU output. Together, they efficiently cover up to 1,750 sq. ft. (200 + 550 + 1,000), making it ideal for combining smaller rooms with a larger living space. Powered by a 48K BTU condenser, this system ensures dependable performance with additional capacity for long-term durability. With SEER2 ratings up to 21.8 and eco-friendly R-454B refrigerant, it offers efficient, sustainable comfort that homeowners can install themselves.
Key Features
-
Three-zone comfort: 6K + 12K + 24K air handlers (42,000 BTU total)
-
Combined coverage: up to 1,750 sq. ft.
-
Powered by 48K BTU condenser
-
High efficiency: 21.8 SEER2 / 10 HSPF2-4
-
Pre-charged Quick Connect® line sets
-
Smart control via SmartHVAC app, Alexa, and Google Assistant
-
Follow Me® remote sensors for personalized comfort
-
Quiet inverter-driven operation
-
Gold Fin® condenser for corrosion resistance
-
Certified: UL, ETL, AHRI
-
Warranty: 7-year compressor, 5-year parts
Specifications
Condenser (DIY-MULTI6-48HP230D-O)
-
Capacity: 48,000 BTU
-
Voltage: 208/230V, 1 Phase, 60 Hz
-
SEER2: 21.8
-
HSPF2-4: 10
-
Max Line Set Length: 221.4 ft
-
Refrigerant: R-454B
-
Dimensions: 37.48" W x 52.48" H x 16.34" D
-
Weight: 223.77 lbs
- PROPOSITION 65 WARNING: Yes
Air Handler (6K BTU - DIY-06-HP-WMAH-230D25)
-
Coverage: Up to 200 sq. ft.
-
Dimensions: 31.57" W x 11.69" H x 7.44" D
-
Weight: 24.47 lbs
Air Handler (12K BTU - DIY-12-HP-WMAH-230D25)
-
Coverage: Up to 550 sq. ft.
-
Dimensions: 31.57" W x 11.69" H x 7.44" D
-
Weight: 29.76 lbs
Air Handler (24K BTU - DIY-24-HP-WMAH-230D25)
-
Coverage: Up to 1,000 sq. ft.
-
Dimensions: 42.52" W x 13.19" H x 8.90" D
-
Weight: 60.63 lbs
What’s Included
-
(1) 48K BTU Condenser
-
(1) 6K BTU Wall-Mounted Air Handler
-
(1) 12K BTU Wall-Mounted Air Handler
-
(1) 24K BTU Wall-Mounted Air Handler
-
(3) Wireless Remotes
-
(3) SmartHVAC Modules
-
Installation Manual
Required Accessories
- 3 X Pre-charged Quick Connect® Line Sets (Select line set length above for each air handler)
Manuals
Shipping & Returns
30 Days Return Policy
How will I be notified when my order ships?
You’ll receive an email with your tracking details after your order has been shipped. This message will go to the email address you provided at checkout. If your order includes multiple items, they may ship separately and generate more than one tracking number. If you haven’t received tracking information within three days after placing your order, please contact us at info@thelivingoutlet.com
How soon will my order be shipped out?
Right after you place your order, you’ll receive a confirmation email showing it has been received and your payment has been pre-authorized.
We process the order within 2-3 business days. If an item is on backorder, we will void the pre-authorization and notify you by email.
What should I expect for shipping timeframes?
Shipping normally takes 5 to 7 business days. The weather, the carriers' schedules, or busy periods of the year may all affect how long it takes to deliver..
What is your policy for returns?
You have 30 days from the date you receive your order to request a return. Free return shipping and 15% restocking fees will be applied on all eligible returns. See our full Return Policy
Is it possible to cancel my order?
Yes—please reach out to us within 12 hours if you need to cancel. Orders that have already shipped can no longer be canceled, and our standard return policy will apply. You can contact us during business hours at 1-800-212-8846 or email us at info@thelivingoutlet.com
**Please note that custom-made products cannot be canceled or refunded once production has begun.
**Click here to read our Shipping Policy in detail.
**Click here to read our Return & Refund Policy in detail.
Warranty
Click here to view the warranty policy in detail
If you have any questions about warranty, or need assistance with your product registration please contact us at info@thelivingoutlet.com
Price Match Policy
Price Match
We are committed to providing the best prices online. If you find a lower price on another site, let us know, and we’ll match it. We want you to be confident that you’re getting the best deal possible on the product you’re ordering.
CLICK HERE TO VIEW OUR PRICE MATCH POLICY
Have Questions?
If you have questions, please reach out:
Email: info@thelivingoutlet.com
Phone: 1-800-212-8846
Business Hours: Monday–Friday 9:00 AM–5:00 PM EST
Payment Options
Credit & Debit Cards
- Visa
- MasterCard
- American Express
- Discover
- Diners Club
Digital Wallets & Online Payments
- Shop Pay
- Apple Pay
- PayPal
- Google Pay
For more details, please visit our Payment Policy page.
Installment Options
You can also pay in installments using the following services:
- Shop Pay Installments
- Affirm
For more information, please visit our Financing page.
Need Help?
If you need assistance with payment options, reach out to us;
Email: info@thelivingoutlet.com
Phone: 1-800-212-8846
Business Hours: Monday–Friday 9:00 AM–5:00 PM EST
Reviews
Frequently Asked Questions
The 5th Generation MRCOOL DIY® Mini Split introduces several major advancements over the 4th Gen, designed for higher efficiency, smarter operation, and environmental responsibility.
Key improvements include:
• Eco-Friendly R-454B Refrigerant:
Uses a next-generation refrigerant with significantly lower global warming potential (GWP), meeting the latest environmental standards.
• Greater Energy Efficiency:
Upgraded SEER2 ratings deliver improved performance and reduced energy consumption.
• Enhanced Reliability:
Stronger internal components improve long-term durability and heating/cooling consistency.
Yes. MRCOOL DIY systems are specifically engineered for homeowner installation — no special HVAC tools or refrigerant handling required. The pre-charged Quick Connect® lines make connecting the indoor and outdoor units simple.
⚠️ Note: A licensed electrician must complete the final electrical connection to ensure safety and compliance with local codes.
Absolutely. Every MRCOOL 5th Gen model functions as a heat pump, providing efficient heating in winter and cooling in summer for year-round comfort.
Yes. The 5th Gen systems include low-ambient heating technology, allowing reliable performance even when outdoor temperatures drop to around -13°F.
A general guideline is about 20 BTU per square foot of conditioned area.
.
Use this quick reference chart:
.
6,000 BTU = 100 - 150 sq ft
9,000 BTU = 150 - 350 sq ft
12,000 BTU = 351- 500 sq ft
18,000 BTU = 501 – 750 sq ft
24,000 BTU = 751 – 1,000 sq ft
36,000 BTU = 1,001 - 1,500 sq ft
Keep in mind factors like insulation, ceiling height, sunlight exposure, and appliance heat output may affect the sizing. For personalized help, contact our Product Experts.
Yes. All 5th Gen MRCOOL DIY systems feature built-in SmartHVAC Wi-Fi control, compatible with both Amazon Alexa and Google Assistant. You can adjust temperature, modes, and schedules directly from your smartphone.
MRCOOL 5th Gen DIY Mini-Splits include industry-leading warranty protection:
7-Year Compressor Replacement Warranty: If the compressor fails within seven years, MRCOOL provides a replacement.
5-Year Parts Warranty: Covers all other system components for five years from the purchase date.
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Have Questions, Or Need Assistance?
Call us at 1-800-212-8846
Email us at info@thelivingoutlet.com
Monday through Friday, 9:00 AM to 5:00 PM (EST)