The MRCOOL® DIY® 5th Gen Multi-Zone 27,000 BTU Ductless Mini Split is built to provide independent heating and cooling across three separate areas with three 12,000 BTU wall-mounted air handlers. This balanced configuration delivers consistent multi-room comfort while allowing each zone to be controlled independently.
Each 12,000 BTU air handler is designed to condition spaces up to approximately 550 square feet, making this system suitable for bedrooms, living rooms, offices, additions, and other medium-sized areas that require dedicated temperature control.
With a 23 SEER2 rating, DC inverter technology, R-454B refrigerant, smartphone app controls, Follow Me® functionality, low ambient cooling, and MRCOOL's pre-charged Quick Connect® line set technology, the system combines energy-efficient operation with a simplified DIY installation experience.
What's Included
-
MRCOOL DIY 5th Gen Multi-Zone 27,000 BTU Mini Split Condenser, DIY-MULTI4-27HP230D-O -
MRCOOL DIY 5th Gen 12,000 BTU Wall Mount Air Handler, DIY-12-HP-WMAH-230D25-O — Quantity: 3 -
MRCOOL DIY 5th Gen R-454B Quick Connect Line Sets — Choose the required line set length for each air handler
Specifications:
BRAND NAME |
MRCOOL |
SERIES |
DIY 5th Gen Multi-Zone Mini-Splits |
EQUIPMENT TYPE |
Ductless Mini Split Heat Pump |
ZONE CONFIGURATION |
3-Zone |
CONDENSER CAPACITY |
27,000 BTU |
SEER2 |
23 |
EER2 |
12 |
HSPF2-4 |
9.5 |
HSPF2-5 |
7 |
COOLING CAPACITY |
26,000 BTU |
HEATING CAPACITY |
26,000 BTU |
TONNAGE |
2.25 Tons |
AIR HANDLER CONFIGURATION |
12,000 BTU + 12,000 BTU + 12,000 BTU |
AIR HANDLER COVERAGE |
Up to 550 sq. ft. each |
TOTAL COVERAGE |
Up to 1,650 sq. ft. |
VOLTAGE |
208/230V |
PHASE |
1 |
CYCLE |
60 Hz |
REFRIGERANT |
R-454B |
INVERTER |
DC Inverter |
LINE SET |
Pre-Charged Quick Connect® |
MAX LINE SET LENGTH |
221.4 ft. |
LIQUID LINE SIZE |
1/4 in. |
SUCTION LINE SIZE |
3/8 in. |
MAX FUSE BREAKER |
25A |
MIN CIRCUIT AMPACITY |
23A |
CONDENSER NOISE |
61 dBA |
CONDENSER MODEL |
DIY-MULTI4-27HP230D-O |
AIR HANDLER MODEL |
DIY-12-HP-WMAH-230D25-O × 3 |
AIR HANDLER MOUNT TYPE |
Wall Mount |
AIR HANDLER FILTER |
Reusable |
WI-FI COMPATIBILITY |
Yes |
APP COMPATIBILITY |
Yes |
IOS COMPATIBILITY |
Yes |
ANDROID COMPATIBILITY |
Yes |
FAN ONLY OPTION |
Yes |
QUIET MODE |
Yes |
AUTO COOL |
Yes |
FOLLOW ME® FEATURE |
Yes |
LOW AMBIENT COOLING |
Yes |
CERTIFICATIONS |
UL, ETL, ENERGY STAR®, AHRI |
BASE PARTS WARRANTY |
5 Years |
BASE COMPRESSOR WARRANTY |
7 Years |
SKU |
DIYM327HPW14D124 |
GTIN |
840255587457 |
UPC |
840255587457 |

















