Overview
MRCOOL DIY 5th Gen Multi-Zone 3-Zone 48,000 BTU 21.8 SEER2 (6K + 18K + 18k) Mini-Split Air Conditioner and Heat Pump 230V
Take command of your indoor comfort with the MRCOOL DIY 5th Gen Multi-Zone Mini Split System — a practical, high-efficiency solution built to deliver powerful heating and cooling without the cost or complexity of professional installation.
- Three Rooms, Personalized Comfort: Independently heat or cool three separate spaces — that are 150 sq. ft., 750 sq. ft and 750 sq. ft. each — so every room maintains its own ideal temperature.
- 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 21.8 SEER2 and heating performance up to 10 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 | 3 |
| Total Capacity | 42,000 BTU |
| Zone Capacity | Zone 1: 6,000 BTU • Zone 2: 18,000 BTU • Zone 3: 18,000 BTU |
| Coverage Area | Total: 1650 sq. ft. • Zone 1: 150 sq. ft. • Zone 2: 750 sq. ft. • Zone 3: 750 sq. ft. |
| Refrigerant | R-454B |
| Line Sets Included | 3 × Pre-charged Quick-Connect® line sets |
| Warranty | 7-Year Compressor • 5-Year Parts |
Outdoor Unit — 48K (Qty: 1)
| Model | DIY-MULTI6-48HP230D-O |
| Dimensions (W × D × H) | 37.48" × 16.34" × 52.48" |
| Cooling Capacity | 43,000 BTU |
| SEER2 | 21.8 |
| EER2 | 12.0 |
| Heating Capacity | 48,000 BTU |
| HSPF2-4 / HSPF2-5 | 10.0 / 7.8 |
| Outdoor Noise Level | 64 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 | 40.0A |
| Max Fuse/Breaker | 45.0A |
| Weight | 223.77 lbs |
| Certifications | ENERGY STAR • AHRI • UL • ETL |
Indoor Unit — 6K (Qty: 1)
| Model | DIY-06-HP-WMAH-230D25-O |
| Dimensions (W × D × H) | 31.57" × 7.44" × 11.69" |
| Mounting Type | Wall mounted |
| Cooling Capacity | 6,000 BTU |
| Heating Capacity | 6,000 BTU |
| Coverage Area | 100–150 sq. ft. |
| Liquid Line Size | 1/4" |
| Suction Line Size | 3/8" |
| Operating Modes | Auto • Cool • Heat • Fan Only • Dry (Dehumidify) • Sleep |
| Weight | 24.47 lbs |
Indoor Unit — 18K (Qty: 2)
| Model | DIY-18-HP-WMAH-230D25-O |
| Dimensions (W × D × H) | 42.52" × 8.90" × 13.19" |
| Mounting Type | Wall mounted |
| Cooling Capacity | 18,000 BTU |
| Heating Capacity | 18,000 BTU |
| Coverage Area | 501–750 sq. ft. |
| Liquid Line Size | 1/4" |
| Suction Line Size | 1/2" |
| Operating Modes | Auto • Cool • Heat • Fan Only • Dry • Sleep |
| Weight | 35.49 lbs |
What’s Included
- (1) 48K BTU Multi-Zone DIY Condenser
- (1) 6K BTU Wall-Mounted Air Handler
- (2) 18K BTU Wall-Mounted Air Handlers
- 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)
- Wireless Remote for each air handler
- SmartHVAC Modules for each indoor
- Installation & Instruction manuals
Installation & Guide
