MRCOOL DIY 5th Gen Multi-Zone 5-Zone 48k BTU 21.8 SEER2 (6K + 6K + 6k + 6k + 9k) Mini-Split Air Conditioner and Heat Pump 230V
The MRCOOL® DIY® 5th Generation Multi-Zone 48K BTU Mini-Split System provides powerful heating and cooling for five separate zones with a streamlined DIY installation. This package includes four 6K wall-mounted air handlers and one 9K unit, ideal for small to mid-sized rooms across the home. Using MRCOOL’s patented Quick Connect® pre-charged line sets, installation is simple, fast, and requires no professional HVAC tools. With eco-friendly R-454B refrigerant, inverter technology, and smart app integration, this system is built for year-round comfort, efficiency, and convenience.
Key Features
-
48,000 BTU condenser supports up to 6 zones
-
Air handler configuration: (6K + 6K + 6K + 6K + 9K)
-
Cooling capacity: 43,000 BTU / Heating capacity: 48,000 BTU
-
Efficiency ratings: SEER2 21.8 / EER2 12 / HSPF2-4 10
-
Compatible with 6K–24K BTU wall-mounted and ceiling cassette air handlers
-
Pre-charged Quick Connect® line sets with R-454B refrigerant
-
SmartHVAC app control plus Alexa and Google Assistant compatibility
-
Follow Me® remote temperature sensing for precise comfort
-
Operating modes: auto, sleep, dry, quiet, and emergency cooling
-
Gold Fin® anti-corrosion condenser technology
-
Warranty: 5-year parts, 7-year compressor, Limited Lifetime replacement (with MRCOOL Care registration)
Specifications
-
Model: DIY-MULTI6-48HP230D-O
-
Brand / Series: MRCOOL / DIY 5th Gen Multi-Zone
-
Tonnage: 4
-
Cooling Capacity: 43,000 BTU
-
Heating Capacity: 48,000 BTU
-
Voltage / Phase / Cycle: 208/230V, 1-Phase, 60 Hz
-
Max Fuse Breaker / Min Circuit Ampacity: 45A / 40A
-
Zone Capacity: Up to 6
-
Refrigerant / Volume: R-454B, 148.15 oz
-
Line Sizes: 1/4" liquid; suction (3/8" ×4) + (1/2" ×2)
-
Max Line Set Length: 221.4 ft
-
Compressor Type: Rotary, inverter DC
-
Decibel Rating (Outdoor): 64 dB
-
Dimensions (W × H × D): 37.48" × 52.48" × 16.34"
-
Weight (Net / Gross): 223.8 lbs / 256.4 lbs
-
Certifications: UL, ETL, Intertek, AHRI, Energy Star
- PROPOSITION 65 WARNING: Yes
What’s Included
-
(1) 48K BTU 5th Gen Multi-Zone DIY Condenser
-
(5) Wall-mounted air handlers (6K + 6K + 6K + 6K + 9K)
-
(5) Wireless remotes
-
(5) Smart HVAC Modules
-
Manual
Required Accessories
- 5 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 5-Zone 48k BTU 21.8 SEER2 (6K + 6K + 6k + 6k + 9k) Mini-Split Air Conditioner and Heat Pump 230V
The MRCOOL® DIY® 5th Generation Multi-Zone 48K BTU Mini-Split System provides powerful heating and cooling for five separate zones with a streamlined DIY installation. This package includes four 6K wall-mounted air handlers and one 9K unit, ideal for small to mid-sized rooms across the home. Using MRCOOL’s patented Quick Connect® pre-charged line sets, installation is simple, fast, and requires no professional HVAC tools. With eco-friendly R-454B refrigerant, inverter technology, and smart app integration, this system is built for year-round comfort, efficiency, and convenience.
Key Features
-
48,000 BTU condenser supports up to 6 zones
-
Air handler configuration: (6K + 6K + 6K + 6K + 9K)
-
Cooling capacity: 43,000 BTU / Heating capacity: 48,000 BTU
-
Efficiency ratings: SEER2 21.8 / EER2 12 / HSPF2-4 10
-
Compatible with 6K–24K BTU wall-mounted and ceiling cassette air handlers
-
Pre-charged Quick Connect® line sets with R-454B refrigerant
-
SmartHVAC app control plus Alexa and Google Assistant compatibility
-
Follow Me® remote temperature sensing for precise comfort
-
Operating modes: auto, sleep, dry, quiet, and emergency cooling
-
Gold Fin® anti-corrosion condenser technology
-
Warranty: 5-year parts, 7-year compressor, Limited Lifetime replacement (with MRCOOL Care registration)
Specifications
-
Model: DIY-MULTI6-48HP230D-O
-
Brand / Series: MRCOOL / DIY 5th Gen Multi-Zone
-
Tonnage: 4
-
Cooling Capacity: 43,000 BTU
-
Heating Capacity: 48,000 BTU
-
Voltage / Phase / Cycle: 208/230V, 1-Phase, 60 Hz
-
Max Fuse Breaker / Min Circuit Ampacity: 45A / 40A
-
Zone Capacity: Up to 6
-
Refrigerant / Volume: R-454B, 148.15 oz
-
Line Sizes: 1/4" liquid; suction (3/8" ×4) + (1/2" ×2)
-
Max Line Set Length: 221.4 ft
-
Compressor Type: Rotary, inverter DC
-
Decibel Rating (Outdoor): 64 dB
-
Dimensions (W × H × D): 37.48" × 52.48" × 16.34"
-
Weight (Net / Gross): 223.8 lbs / 256.4 lbs
-
Certifications: UL, ETL, Intertek, AHRI, Energy Star
- PROPOSITION 65 WARNING: Yes
What’s Included
-
(1) 48K BTU 5th Gen Multi-Zone DIY Condenser
-
(5) Wall-mounted air handlers (6K + 6K + 6K + 6K + 9K)
-
(5) Wireless remotes
-
(5) Smart HVAC Modules
-
Manual
Required Accessories
- 5 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.
You may also like
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)