MRCOOL® 18K 3-Zone DIY® Mini Split System With Three 6K Indoor Units and three 25ft pre- charged line sets - R-454B - DIYM318HPW00D15

Product Description 
Model: DIYM318HPW00D15
The MRCOOL® DIYM318HPW00D15 is the ultimate multi-room comfort solution for homeowners who want professional-grade heating and cooling without hiring an HVAC contractor. Designed around MRCOOL’s industry-leading DIY® platform, this 3-zone system delivers precise comfort control to three separate rooms, all from one compact outdoor condenser.
This bundle pairs an 18,000 BTU DIY® multi-zone condenser with three 6K wall-mounted air handlers, each connected using 25-foot pre-charged DIY® QuickConnect® line sets. That added line length gives you more flexibility for installs where indoor units are farther from the condenser — without sacrificing efficiency, performance, or warranty protection.
Powered by R-454B refrigerant, protected with Gold Fin® corrosion-resistant coating, and controlled through the MRCOOL® Smart HVAC Controller®, this system is built for long-term reliability, energy efficiency, and simple DIY installation.
  
18K MRCOOL® DIY® MULTI-ZONE CONDENSER (DIY-MULTI3-18HP230D-O)
At the heart of this system is the MRCOOL® DIY® 18K 3-zone condenser, engineered to deliver steady, inverter-driven comfort across multiple rooms.
 
Key Performance Highlights

Supports up to 3 independent zones
High efficiency SEER2-rated performance
DC inverter compressor for quiet, variable output
Factory-sealed DIY® QuickConnect® ports — no vacuuming, gauges, or refrigerant handling
Gold Fin® coated outdoor coil for coastal and high-humidity durability
ENERGY STAR® & AHRI Certified

 
 
Electrical Requirements

Minimum Circuit Ampacity: 15A
Maximum Fuse / Breaker: 20A

  
️ THREE 6K DIY® WALL-MOUNT AIR HANDLERS (DIY-06-HP-WMAH-230D25-O)
This bundle includes three 6,000 BTU indoor air handlers, ideal for bedrooms, offices, nurseries, studios, bonus rooms, or guest spaces up to ~150- 200 sq. ft. Each. 
  
Each air handler features:

Whisper-quiet operation
Follow Me® technology — senses temperature at the remote, not the ceiling
Dry Mode for humidity control
Washable air filter
Multiple fan speeds + auto mode
Full control via remote, app, or voice assistant

Every zone operates independently, allowing different temperatures in each room for maximum comfort and efficiency.
 
THREE 25-FT DIY® QUICKCONNECT® LINE SETS (DIY25-1438-O)
Unlike standard kits, this bundle upgrades you to three 25-foot pre-charged line sets, perfect for longer or more complex installations.

Line Set Details

25 ft length (extended reach)
Factory-sealed R-454B refrigerant
DIY® QuickConnect® fittings
Integrated DIYPRO® cable (communication wire inside insulation)
No brazing, no refrigerant tools, no HVAC license required

This is one of the easiest multi-zone installs on the market.
 
WHAT’S INCLUDED — DIYM318HPW00D15
Outdoor Unit

(1) MRCOOL® DIY® 18K 3-Zone Condenser Model: DIY-MULTI3-18HP230D-O

  
Indoor Units

(3) MRCOOL® 6K Wall-Mounted Air Handlers Model: DIY-06-HP-WMAH-230D25-O

  
Line Sets

(3) MRCOOL® 25 ft DIY® QuickConnect® Line Sets w/ DIYPRO® Cable Model: DIY25-1438-O

 
Accessories

Wireless remotes
Wall mounting hardware
MRCOOL® Smart HVAC Controller® module
Installation manuals

Smartphone not included.
 
 
❓ FAQ — Frequently Asked Questions 
Can each room be set to a different temperature?
Yes. Each zone operates independently through the MRCOOL® Smart HVAC Controller®.
 
Is this system truly DIY?
Yes. The DIY® QuickConnect® system eliminates vacuuming, brazing, and refrigerant handling.
 
Why does this bundle include 25-ft line sets?
For longer installation runs or condenser placement flexibility beyond standard 16-ft kits.
 
Is this system efficient?
Extremely. Inverter technology + R-454B refrigerant = lower energy bills year-round.
 
Does it support Alexa or Google Assistant?
Yes. Full voice control supported.
  
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 dealer

BUY DIRECT!
Feel Free to call us anytime. Family Friendly help just a dial away. We love talking HVAC615-553-8118
Family owned & USAs #1 MRCOOL Authentication Dealer.
 
Brand:MRCOOL®Category:3 Zones/RoomsSKU:DIYM318HPW00D15Tags:18K Multi Zone, 3 Zone Mini Split, 6k + 6k + 6k, 6K Air Handler, DIY, DIY 5th Gen, DIY Mini Split, DIY Multi Zone, DIY QuickConnect, DIY Series, DIYM318HPW00D15, DIYPRO cable, Follow Me, Gold Fin, MRCOOL, MRCOOL Direct, MRCOOL DIY, MULTI ZONE, Pre-Charged R-454B, R-454B, R-454B refrigerant, R454B, Smart HVAC