MRCOOL® DIY® 5th Gen Multi-Zone 3-Zone 36,000 BTU 23 SEER2 (6K + 9K + 9K)- 3x 25ft line sets- Ductless Mini-Split Air Conditioner & Heat Pump- DIYM336HPW03D21

Product Description 

Model: DIYM336HPW03D21

 

The MRCOOL® DIYM336HPW03D21 is a high-efficiency 3-zone ductless mini-split system designed for homeowners who want maximum comfort, independent room control, and a true DIY installation—without paying for professional HVAC labor.

This system is powered by the MRCOOL® DIY® 5th Generation 36,000 BTU multi-zone condenser and configured with one 6,000 BTU indoor air handler and two 9,000 BTU air handlers, making it an ideal solution for bedrooms, offices, guest rooms, finished basements, and smaller living spaces. Each zone operates independently, allowing you to heat or cool individual rooms only when needed—improving comfort while reducing energy costs.

Installation is simplified using MRCOOL® DIY® QuickConnect® technology. This bundle includes three 25-ft pre-charged QuickConnect® line sets, factory-sealed with R-454B refrigerant, allowing you to skip vacuuming, refrigerant charging, and licensed HVAC labor. The included DIYPRO® cable eliminates the need for electrical conduit, further streamlining installation and saving time.

With DC inverter technology, Gold Fin® corrosion protection, Follow Me® temperature sensing, and full MRCOOL® Smart HVAC Controller® App integration, this system delivers quiet operation, long-term durability, and industry-leading energy efficiency—making it one of the strongest DIY multi-zone systems available today.

 

KEY FEATURES & PERFORMANCE HIGHLIGHTS

• 36,000 BTU total system capacity
• 3 independently controlled comfort zones
• (1) 6K + (2) 9K BTU wall-mounted air handlers
• 23 SEER2 high-efficiency rating
• DC inverter variable-speed compressor
• DIY® QuickConnect® pre-charged line sets
• 25-ft line-set reach included
• DIYPRO® cable (no conduit required)
• Gold Fin® anti-corrosion coating
• Follow Me® remote-based temperature control
• MRCOOL® Smart HVAC Controller® App
• Alexa® & Google Home® compatibility
• ENERGY STAR® & AHRI certified

 

ELECTRICAL REQUIREMENTS & BREAKER INFORMATION 

Outdoor Condenser — DIY-MULTI5-36HP230D-O

• Voltage: 208 / 230V
• Phase: Single-Phase
• Frequency: 60 Hz
• Minimum Circuit Ampacity (MCA): 30.5 Amps
• Maximum Breaker Size: 35 Amps
• Dedicated Circuit Required: Yes

 

DIMENSIONS & WEIGHT

Outdoor Condenser

• Width: 37.24 in
• Height: 31.89 in
• Depth: 16.14 in
• Net Weight: ~169 lbs

6K Indoor Air Handler

• Width: 31.57 in
• Height: 11.69 in
• Depth: 7.44 in
• Net Weight: ~24.5 lbs

9K Indoor Air Handlers (each)

• Width: 31.57 in
• Height: 11.69 in
• Depth: 7.44 in
• Net Weight: ~24.5 lbs

 

WARRANTY COVERAGE 

• 5-Year Parts Warranty
• 7-Year Compressor Warranty
• Limited Lifetime Replacement Warranty
  (with MRCOOL® Care Program registration)

 

WHAT’S INCLUDED IN THIS BUNDLE 

• ✔ MRCOOL® DIY® 36,000 BTU Multi-Zone Outdoor Condenser
• ✔ (1) 6,000 BTU Wall-Mounted Indoor Air Handler
• ✔ (2) 9,000 BTU Wall-Mounted Indoor Air Handlers
• ✔ (3) 25-ft DIY® QuickConnect® Line Sets (1/4 × 3/8)
• ✔ DIYPRO® communication cable
• ✔ Wireless remotes for each indoor unit
• ✔ Mounting hardware & installation manuals

Smart phone not included.

 

FREQUENTLY ASKED QUESTIONS (FAQ)

Can each room be controlled independently?

Yes. Each indoor unit has its own thermostat and remote.

 

Is professional HVAC installation required?

No. This system is engineered specifically for DIY installation.

 

Does it support Wi-Fi and voice control?

Yes. Works with the MRCOOL® Smart HVAC Controller® App, Alexa®, and Google Home®.

 

Why choose 25-ft line sets?

25-ft line sets provide added flexibility for longer distances between the condenser and indoor units.

 

  

Why Buy From MRCOOL DIRECT?

When you order from MRCOOL Direct, you get:

• ✅ Authorized MRCOOL® dealer – Your warranty is protected
• ✅ Factory-fresh units – No refurbished or mystery sources
• ✅ Fast U.S. shipping – Most in-stock items ship in 1–3 business days
• ✅ Financing options – Make high-efficiency comfort more affordable
• ✅ Real product support – Help with sizing, line set selection, and DIY questions
• ✅ No third-party marketplace middlemen – Just genuine MRCOOL® systems from a trusted MRCOOL® dealer.

BUY DIRECT!

Feel Free to call us anytime. Family Friendly help just a dial away. We love talking HVAC
615-553-8118

Family owned & USAs #1 MRCOOL® Authentication Dealer.