MRCOOL DIY 5th Gen Multi-Zone 4-Zone 48k BTU 21.8 SEER2 (6K + 12K + 12k + 18k) Mini-Split Air Conditioner and Heat Pump 230V
This 5th Generation MRCOOL DIY system delivers 48,000 BTU of efficient heating and cooling using eco-friendly R-454B refrigerant—ideal for homes up to 2,100 sq. ft. It includes one 6K, two 12K, and one 18K air handler to cover a range of small to large room sizes. With 21.8 SEER2 performance, app-based smart control, and Quick Connect® line sets for simple DIY installation, this system offers whole-home comfort without the cost of professional setup.
Key Features
-
4-zone setup (6K + 12K + 12K + 18K)
-
DIY Quick Connect® installation
-
R-454B refrigerant (eco-friendly)
-
SmartHVAC app, Alexa, Google Assistant compatible
-
Follow Me® remote sensor
-
Quiet indoor operation
-
Gold Fin® corrosion protection
-
21.8 SEER2 / 10 HSPF2-4 efficiency
- 5-year parts and 7-year compressor warranty
Specifications
-
Model: DIY-MULTI6-48HP230D-O
-
Cooling Capacity: 43,000 BTU
-
Heating Capacity: 48,000 BTU
-
Zones Supported: Up to 6
-
Voltage: 208/230V, 60Hz, Single Phase
-
SEER2: 21.8
-
EER2: 12
-
HSPF2-4: 10
-
Refrigerant: R-454B (pre-charged)
-
Max Line Set Length: 221.4 ft
-
Liquid Line: 1/4"
-
Suction Lines: (3/8" × 4), (1/2" × 2)
-
Sound Level: 64 dBA
-
Inverter Compressor: DC Rotary
-
App Support: iOS & Android
-
Certifications: Energy Star, AHRI, ETL, UL
- PROPOSITION 65 WARNING: Yes
What’s Included
-
(1) 48K BTU 5th Gen DIY Condenser
-
(1) 6K Air Handler
-
(2) 12K Air Handlers
-
(1) 18K Air Handler
-
Remote controls
-
Installation manuals
Accessories Sold Separately
- 4 X Pre-charged Quick Connect® Line Sets (Select line set length above for each air handler)
Manuals
Free Shipping
Free standard shipping on all orders within the continental United States.
Order Confirmation & Tracking
After placing your order, you will receive an order confirmation email. Once your order ships, a shipping confirmation email with tracking details will be sent to the email address provided at checkout. If your order ships in multiple packages, you may receive more than one tracking number.
If you have not received tracking information within three business days, please contact us at info@thelivingoutlet.com.
Order Processing Time
Orders are typically processed within 2–3 business days. In the event of unexpected inventory delays, we will notify you before shipment.
Delivery Timeframes
Carrier transit times generally range from 5–7 business days after shipment. Delivery times may vary due to location, weather, carrier schedules, or peak shipping periods.
Returns
You may request a return within 30 days of delivery, provided the item is unused, uninstalled, and returned in original packaging.
- • A 25% restocking fee applies to eligible returns
- • Return shipping costs are the customer’s responsibility
- • A Return Merchandise Authorization (RMA) is required before returning any item
For complete details, please review our Return & Refund Policy.
Order Cancellation
If you need to cancel or change an order, please contact us immediately before the order ships.
Once an order has shipped, it can no longer be canceled and will follow our standard return process.
Please note: Custom or special-order items cannot be canceled once processing has begun.
As an authorized dealer, we assist customers with warranty questions, product registration, and coordination with the manufacturer when needed.
You can review complete warranty details below.
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 service:
- Shop Pay Installments
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 4-Zone 48k BTU 21.8 SEER2 (6K + 12K + 12k + 18k) Mini-Split Air Conditioner and Heat Pump 230V
This 5th Generation MRCOOL DIY system delivers 48,000 BTU of efficient heating and cooling using eco-friendly R-454B refrigerant—ideal for homes up to 2,100 sq. ft. It includes one 6K, two 12K, and one 18K air handler to cover a range of small to large room sizes. With 21.8 SEER2 performance, app-based smart control, and Quick Connect® line sets for simple DIY installation, this system offers whole-home comfort without the cost of professional setup.
Key Features
-
4-zone setup (6K + 12K + 12K + 18K)
-
DIY Quick Connect® installation
-
R-454B refrigerant (eco-friendly)
-
SmartHVAC app, Alexa, Google Assistant compatible
-
Follow Me® remote sensor
-
Quiet indoor operation
-
Gold Fin® corrosion protection
-
21.8 SEER2 / 10 HSPF2-4 efficiency
- 5-year parts and 7-year compressor warranty
Specifications
-
Model: DIY-MULTI6-48HP230D-O
-
Cooling Capacity: 43,000 BTU
-
Heating Capacity: 48,000 BTU
-
Zones Supported: Up to 6
-
Voltage: 208/230V, 60Hz, Single Phase
-
SEER2: 21.8
-
EER2: 12
-
HSPF2-4: 10
-
Refrigerant: R-454B (pre-charged)
-
Max Line Set Length: 221.4 ft
-
Liquid Line: 1/4"
-
Suction Lines: (3/8" × 4), (1/2" × 2)
-
Sound Level: 64 dBA
-
Inverter Compressor: DC Rotary
-
App Support: iOS & Android
-
Certifications: Energy Star, AHRI, ETL, UL
- PROPOSITION 65 WARNING: Yes
What’s Included
-
(1) 48K BTU 5th Gen DIY Condenser
-
(1) 6K Air Handler
-
(2) 12K Air Handlers
-
(1) 18K Air Handler
-
Remote controls
-
Installation manuals
Accessories Sold Separately
- 4 X Pre-charged Quick Connect® Line Sets (Select line set length above for each air handler)
Manuals
Shipping & Returns
Free Shipping
Free standard shipping on all orders within the continental United States.
Order Confirmation & Tracking
After placing your order, you will receive an order confirmation email. Once your order ships, a shipping confirmation email with tracking details will be sent to the email address provided at checkout. If your order ships in multiple packages, you may receive more than one tracking number.
If you have not received tracking information within three business days, please contact us at info@thelivingoutlet.com.
Order Processing Time
Orders are typically processed within 2–3 business days. In the event of unexpected inventory delays, we will notify you before shipment.
Delivery Timeframes
Carrier transit times generally range from 5–7 business days after shipment. Delivery times may vary due to location, weather, carrier schedules, or peak shipping periods.
Returns
You may request a return within 30 days of delivery, provided the item is unused, uninstalled, and returned in original packaging.
- • A 25% restocking fee applies to eligible returns
- • Return shipping costs are the customer’s responsibility
- • A Return Merchandise Authorization (RMA) is required before returning any item
For complete details, please review our Return & Refund Policy.
Order Cancellation
If you need to cancel or change an order, please contact us immediately before the order ships.
Once an order has shipped, it can no longer be canceled and will follow our standard return process.
Please note: Custom or special-order items cannot be canceled once processing has begun.
Warranty
As an authorized dealer, we assist customers with warranty questions, product registration, and coordination with the manufacturer when needed.
You can review complete warranty details below.
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 service:
- Shop Pay Installments
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
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.
