Overview
MRCOOL DIY 5th Gen Multi-Zone 2-Zone 18k BTU 23.9 SEER2 (9K + 9K) Mini-Split Air Conditioner and Heat Pump 230V – Includes Line Sets
Take full control of your indoor comfort with the MRCOOL DIY 5th Gen Multi-Zone Mini Split System — a practical, high-efficiency solution designed to deliver powerful heating and cooling without the cost or complexity of professional installation.
- Two Rooms, Customized Comfort: Independently heat or cool two separate areas up to 350 sq. ft. each, allowing personalized temperature control in every space.
- Designed for True DIY Installation: Skip contractor scheduling and specialty tools — this system is engineered for straightforward homeowner installation using basic hand tools.
- Fast, Clean Setup: Pre-charged Quick-Connect® line sets eliminate vacuuming and refrigerant handling, making installation simple and hassle-free.
- High-Efficiency Performance: With cooling efficiency up to 23.9 SEER2 and heating performance up to 10.8 HSPF2-4, the system helps reduce year-round energy costs.
- Cold-Climate Reliability: Built to maintain dependable heating performance in temperatures as low as -13°F.
- Warranty Confidence: Backed by a 7-year compressor replacement warranty and 5-year parts coverage for long-term peace of mind.
Specifications
System Overview
| System Type | Ductless Mini Split Air Conditioner & Heat Pump |
| Zones | 2 |
| Total Capacity | 18,000 BTU |
| Zone Capacity | Zone 1: 9,000 BTU • Zone 2: 9,000 BTU |
| Coverage Area | Total: 700 sq. ft. • 350 sq. ft. per zone |
| Refrigerant | R-454B |
| Line Sets Included | 2 × Pre-charged Quick-Connect® line sets |
| Warranty | 7-Year Compressor • 5-Year Parts • Extended Limited Lifetime Replacement* |
*If the original owner does not register the unit, warranty defaults to 5-year parts / 7-year compressor coverage. Annual enrollment in the MRCOOL Care Program is required to maintain eligibility for extended compressor replacement benefits.
Outdoor Unit — 18K (Qty: 1)
| Model | DIY-MULTI3-18HP230D-O |
| Dimensions (W × D × H) | 35.04" × 13.46" × 26.50" |
| Cooling Capacity | 18,000 BTU |
| SEER2 | 23.9 |
| EER2 | 13.0 |
| Heating Capacity | 18,000 BTU |
| HSPF2-4 / HSPF2-5 | 10.0 / 7.8 |
| Outdoor Noise Level | 60 dB(A) |
| Operating Temperature | Cooling: -13°F to 122°F • Heating: -13°F to 75°F |
| Electrical | 208–230V • 1 Phase • 60Hz |
| Min Circuit Ampacity | 16.0A |
| Max Fuse/Breaker | 20.0A |
| Weight | 101.63 lbs |
Indoor Units — 9K (Qty: 2)
| Model | DIY-09-HP-WMAH-230D25-O |
| Dimensions (W × D × H) | 31.57" × 7.44" × 11.69" |
| Mounting Type | Wall mounted |
| Cooling Capacity | 9,000 BTU per unit |
| Heating Capacity | 9,000 BTU per unit |
| Coverage Area | ~350 sq. ft. per unit |
| Liquid Line Size | 1/4" |
| Suction Line Size | 3/8" |
| Weight | 24.47 lbs per unit |
What’s Included
- 1 X 18K BTU Multi-Zone Condenser
- 2 X 9K BTU Air Handler
- Pre-Charged Quick Connect® Line Sets for each indoor air handler (length per selected option)
- DIYPro® communication wiring is included for each indoor air handler (one per zone)
- Condensate drain hose (included)
- 2 X Wireless Remotes
- 2 X SmartHVAC Modules
- Installation & Instruction manuals
Installation & Guides
