MRCOOL DIY 5th Gen 36,000 BTU 5‑Zone Ductless Mini Split Heat Pump System (6K + 24K Air Handlers with 25 ft QuickConnect Line Sets)

MRCOOL DIY 5th Gen 36,000 BTU 5‑Zone Ductless Mini Split Heat Pump System (6K + 24K Air Handlers with 25 ft QuickConnect Line Sets)

The MRCOOL DIY® 5th Gen 36,000 BTU 5‑Zone Multi‑Zone Bundle is designed to deliver efficient heating and cooling across multiple spaces while remaining fully DIY‑friendly. This system includes a high‑performance 36,000 BTU outdoor condenser paired with two indoor wall‑mounted air handlers — a 6,000 BTU unit ideal for smaller rooms and a 24,000 BTU unit designed for larger spaces. Together, they provide zoned comfort for bedrooms, living areas, offices, or any combination of spaces, all managed independently.

Installation is simplified using MRCOOL’s QuickConnect® pre‑charged line sets, which come sealed with R‑454B refrigerant, removing the need for vacuum pumps or specialized HVAC tools. The included 25 ft line sets provide flexibility for unit placement according to your layout, making this system ideal for homeowners who want professional comfort without hiring an installer.

Each indoor unit comes with its own wireless remote for individual zone control. The system features DC inverter technology for quiet, efficient operation year‑round, as well as smart control compatibility for remote operation via app or voice assistant. Built with corrosion‑resistant materials, the outdoor condenser ensures long‑term durability, while manufacturer warranty coverage provides peace of mind.

This MRCOOL DIY® 5‑Zone bundle combines advanced technology, energy efficiency, and DIY installation convenience into one complete package, delivering reliable, year‑round comfort across your home or workspace.

Features

• Multi‑zone comfort with five controllable zones

• Includes indoor air handlers: 6,000 BTU and 24,000 BTU units

• DIY‑friendly installation with pre‑charged 25 ft QuickConnect® line sets

• Uses environmentally improved R‑454B refrigerant

• Quiet, energy‑efficient DC inverter technology

• Wireless remotes included for independent zone control

• Smart HVAC compatibility via app and voice assistant

• Durable, corrosion‑resistant outdoor condenser

• Ideal for whole‑home or multi-room HVAC needs

Specifications

What’s Included

✔ 1 × 36,000 BTU 5-Zone DIY Condenser — 

DIY-MULTI5-36HP230D-O

• 5th Generation DIY® Multi-Zone condenser, 36,000 BTU, 230V
• Supports up to 5 indoor zones from a single outdoor unit
• Up to 23 SEER2 and 9.9 HSPF2-4 efficiency
• Factory-charged with R-454B, a more efficient, lower-GWP refrigerant
• Works with 5th Gen MRCOOL DIY air handlers (6K, 9K, 12K, 18K, 24K, 36K)
• No vacuum pump needed thanks to Quick-Connect® line sets
• SmartHVAC® App control, plus Amazon Alexa and Google Assistant compatibility
• Gold Fin® corrosion-resistant protection
• Ideal for total coverage up to around 1,500 sq. ft. 

✔ 1 × 6,000 BTU DIY Wall Mount Air Handler — 

DIY-06-HP-WMAH-230D25-O 

• 6K BTU wall-mount indoor unit, 208/230V
• Perfect for a bedroom, office, nursery, or small room up to 200 sq. ft.
• Pairs with 1/4” × 3/8” R-454B DIY Quick-Connect line sets
• Super quiet operation with multi-speed fan and Quiet Mode
• Follow Me® function uses the remote’s temperature for more accurate comfort
• Dry Mode helps pull humidity out of the air on muggy days
• Built-in WiFi for SmartHVAC® App, Alexa, and Google Assistant
• Comes with DIYPRO® cable, eliminating the need for electrical conduit

✔ 1 × 24,000 BTU DIY Wall Mount Air Handler — 

DIY-24-HP-WMAH-230D25-O

• 24K BTU wall-mount indoor unit, 208/230V
• Great for large living rooms, open-concept spaces, or big bonus rooms up to 1,050 sq. ft.
• ENERGY STAR® Certified high-efficiency performance
• Uses 3/8” × 5/8” R-454B DIY Quick-Connect line sets
• Ultra-quiet operation, five fan speeds, and advanced airflow control
• Dry Mode and Follow Me® comfort features
• Built-in WiFi + SmartHVAC® App + voice control (Alexa & Google)
• Includes durable DIYPRO® cable 

✔ 1 × 25ft R-454B Line Set — 

DIY25-1438-O (1/4” × 3/8”)

• 25-foot pre-charged R-454B Quick-Connect® line set
• Sized for 6K, 9K, and 12K indoor units
• 1/4” liquid line × 3/8” suction line
• Factory vacuum-sealed and pre-charged—no flaring, brazing, or vacuuming
• White insulated jacket with quick-connect fittings 

✔ 1 × 25ft R-454B Line Set — 

DIY25-3858-O (3/8” × 5/8”)

• 25-foot pre-charged R-454B Quick-Connect® line set
• Sized for 24K and 36K indoor units
• 3/8” liquid line × 5/8” suction line
• Fully sealed, pre-charged, ready for DIY install
• Quick-Connect® fittings designed to lock directly to the DIY condenser and air handler

Why This Bundle Beats Standard Mini-Splits

• True DIY Install – No vacuum pump, no gauges, no refrigerant handling
• Expandable System – Start with 6K + 24K and add more zones later (up to 5 total)
• Smart Home Ready – Control each zone from your phone or via Alexa/Google
• Future-Focused Refrigerant – R-454B is more efficient and lower GWP than R-410A
• Quiet, Zoned Comfort – Whisper-level indoor units with room-by-room control
• Strong Warranty Support – Up to Limited Lifetime Replacement warranty with MRCOOL® Care (plus 5-year parts & 7-year compressor base warranties)

Ideal Uses for This Bundle

This 36k multi-zone configuration is perfect for:

• Small homes wanting two main conditioned zones
• A large living room or open area + one bedroom/office
• Finished basements plus a small media room or gym
• Rental properties, in-law suites, and ADUs where DIY install cuts project cost

If you want whole-home style comfort with DIY installation and future expansion, this MRCOOL 36k 5th Gen bundle is one of the strongest setups on the market.

Frequently Asked Questions (FAQ's)

 1. Can I install this MRCOOL DIY system myself?

 Yes. Every MRCOOL DIY 5th Gen system is engineered for true homeowner installation with no EPA license, no vacuum pump, and no gauges needed thanks to the factory-charged R-454B Quick-Connect® line sets.

2. Do I need a vacuum pump or special tools?

No. All DIY Quick-Connect® line sets are pre-charged and factory sealed, so installation is completely vacuum-free.

3. Can I add more zones later?

Yes. The DIY-MULTI5-36HP230D-O condenser supports up to 5 total zones, so you can start with 2–3 indoor units now and add more later.

4. Is R-454B safe and future-approved?

Yes. R-454B is the future standard refrigerant, replacing R-410A nationwide. It is more efficient, lower GWP, and already required in many regions.

5. How long are the included line sets?

Your bundle includes 25-ft R-454B Quick-Connect® line sets, matched to each air handler’s size.

6. Is this bundle enough to cool and heat my whole home?

Depending on your home layout, insulation, and zone sizing, the 36k multi-zone condenser can cover up to ~1,500 sq. ft. with proper indoor unit placement.

7. Are the air handlers quiet?

Yes. 5th Generation MRCOOL DIY indoor units operate as low as 20 dBA—quieter than a library. 

8. Does this system support smart home control?

Yes. All 5th Gen units work with:

• Apple & Android SmartHVAC App
• Amazon Alexa
• Google Assistant
• WiFi programmable scheduling

9. Do I need an electrician to connect power?

 Most DIYers can run the whip and breaker with basic electrical knowledge, but if you’re unsure, hire a licensed electrician. The indoor units use DIYPRO® cable, no conduit needed.

10. Can I use longer line sets?

Yes. You can link multiple DIY line sets up to 75 ft each using the coupler kits, up to the condenser’s max line-set length rating.

11. Is the unit Energy Star Certified?

Many 5th Gen MRCOOL air handlers (like the 24K) are Energy Star® Certified, and the condenser is AHRI rated.

12. What rooms do the 6K and 24K units cover?

• 6K air handler: up to 200 sq ft
• 24K air handler: up to 1,050 sq ft

 13. Is the warranty real when buying online?

YES — only when buying through an authorized dealer like MRCOOLDIRECT.com. Unauthorized websites void the warranty.

14. What warranties are included? 

• 5-Year Parts
• 7-Year Compressor
• Limited Lifetime Replacement when enrolled in MRCOOL Care™.

15. Can I install the line set through a wall thicker than 8 inches?

Yes. You may need a longer sleeve, but the Quick-Connect fittings will still work.

16. Will this system dehumidify?

Yes — use DRY MODE for humidity removal in humid climates. 

17. Is this system good for a garage, shop, or basement?

Yes. The 24K air handler especially is ideal for large basements, bonus rooms, and shops. 

18. How fast will this ship?

MRCOOL DIRECT ships from U.S. warehouses, typically in 1–3 business days depending on your location.