Weekend Discovery｜MRCOOL® 18K DIY® 3-Zone DIY Mini Split System With Three 6K Air Handlers & 16ft Pre-Charged line sets- R-454B - DIYM318HPW00D00

Product Description 
Model: DIYM318HPW00D00
 
Perfect Multi-Room Comfort for Small & Medium Zones — Without Hiring an HVAC Technician
The MRCOOL® DIYM318HPW00D00 is the ideal multi-zone mini split for homeowners who want reliable comfort in several smaller rooms — offices, bedrooms, guest rooms, nurseries, studios, and compact living areas — without paying for installation labor or refrigerant handling.
Powered by MRCOOL® advanced 18K triple-zone condenser, this package includes three 6K indoor air handlers, each designed to efficiently heat and cool rooms up to 100–200 sq. ft. With smart controls, whisper-quiet operation, and completely DIY® Quick-Connect line sets, this bundle is engineered for homeowners who want professional performance with simple, tool-free setup.
Whether you’re outfitting an apartment, a rental property, a home office suite, or multiple bedrooms, this system provides individual room control, superb energy savings, and the easiest multi-zone installation available today.
  
 18K MRCOOL® DIY Multi-Zone Condenser — Small Footprint, Big Performance
Your system includes the DIY-MULTI3-18HP230D-O, a compact but powerful triple-zone outdoor unit offering
✔ High Efficiency

SEER2: 21.2 (varies slightly depending on matched heads)

HSPF2-4: 9.5 

✔ Flexible 3-Zone Capacity
Perfect for small rooms, spare rooms, offices, dormers, enclosed porches, and small living areas.
✔ 100% DIY Installation
The condenser uses MRCOOL® R-454B Quick-Connect® ports, allowing refrigerant-safe installation without gauges, pumps, or licensed technicians.
✔ SmartHVAC™ App Ready
Control temps, timers, schedules, and energy usage from anywhere.
✔ Voice Control
Fully compatible with Amazon Alexa and Google Assistant.
✔ Strong Warranty Protection

7-year compressor warranty
5-year parts warranty
Eligible for the MRCOOL Care kit program 

A perfect choice for homeowners wanting the convenience of multi-zone comfort with a small outdoor footprint.
 
️ Three 6K DIY Wall-Mounted Air Handlers — Ideal for Bedrooms & Offices
bundle includes 3 × DIY-06-HP-WMAH-230D25-O, designed for rooms up to 100–200 sq. ft. each.
Each air handler provides:
✔ Quiet, Smooth Comfort
Variable-speed airflow adapts automatically to your zone’s heating or cooling needs.
✔ Smart Functionality
Control via remote, app, voice assistant, or program schedules.
✔ Follow Me® Mode
The air handler adjusts output based on the remote’s location for precise room comfort.
✔ Dry Mode
Reduces humidity without over-cooling — excellent for coastal, humid, or basement environments.
✔ Washable Filter
Saves you money on replacements.
✔ Sleek, Clean Design
Matches any décor with a minimal, modern profile.
These small-capacity units provide targeted comfort exactly where you need it most.
 
 Three 16 ft Pre-Charged Line Sets — Easiest Install in the Industry
bundle includes:
✔ 3 × DIY16-1438-O

16 ft length
Pre-charged with R-454B refrigerant
Leak-proof Quick-Connect fittings
1/4” × 3/8” lines for 6K indoor units
Heavy insulation + flexible routing
Built-in DIYPro® communication cable

With no refrigerant handling required, each zone installs in under an hour.
 
⚡ ELECTRICAL REQUIREMENTS
DIY-MULTI3-18HP230D-O Condenser:

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

Always hire an electrician for high-voltage hookup.
 
WHAT’S INCLUDED — DIYM318HPW00D00
✔ Outdoor

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

✔ Indoor

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

✔ Line Sets

(3) 16 ft Pre-Charged Line Sets (DIY16-1438-O)

✔ Accessories

(3) remotes
(3) DIYPro® communication cables
Mounting brackets & hardware
SmartHVAC app module
Installation manual

Smartphone not included.
  
❓ FAQ- Frequently Asked Questions 
What size rooms can the 6K units handle?
Up to 100–200 sq. ft. each — perfect for bedrooms, offices, or small dens.

Can all three zones run at different temperatures?
Yes — every room has independent temperature control.

Is this system fully DIY?
Yes. All refrigerant line sets are pre-charged and factory sealed.

Can I add larger air handlers later?
Yes — as long as the total BTU load does not exceed the condenser’s limits.
 
Does this system work with apps and voice control?
Yes — via SmartHVAC + Alexa + Google 
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.
 
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