The MRCOOL® DIY® 5th Generation Multi-Zone 18,000 BTU system is designed to provide efficient heating and cooling across two separate indoor spaces with a 9,000 BTU and 12,000 BTU configuration. With up to 21 SEER efficiency, DC inverter technology, and a 2-zone condenser, the system delivers dependable year-round comfort while maintaining efficient operation.
Designed with MRCOOL® DIY® installation in mind, the system works with pre-charged Quick Connect® line sets that simplify the connection process without requiring specialized HVAC tools. The 9,000 BTU wall-mounted air handler is designed for spaces up to approximately 400 square feet, while the 12,000 BTU air handler can serve areas up to approximately 550 square feet.
The system features R-454B refrigerant, a corrosion-resistant Gold Fin® condenser, Follow Me® temperature sensing, low ambient heating and cooling operation, and smartphone app controls. The 18,000 BTU condenser supports up to two indoor units in this configuration and provides a 5-year parts warranty with a 7-year compressor warranty, with limited lifetime compressor coverage available through registration.
What's Included
-
MRCOOL DIY 5th Gen Multi-Zone 18,000 BTU Mini Split Condenser, DIY-MULTI3-18HP230D-O -
MRCOOL DIY 5th Gen 9,000 BTU Wall Mount Air Handler, DIY-09-HP-WMAH-230D25-O -
MRCOOL DIY 5th Gen 12,000 BTU Wall Mount Air Handler, DIY-12-HP-WMAH-230D25-O
Specifications:
|
BRAND NAME |
MRCOOL |
|
SERIES |
DIY Multi-Zone 5th Gen |
|
MODEL |
DIYM218HPW04D24 |
|
CONDENSER MODEL |
DIY-MULTI3-18HP230D-O |
|
AIR HANDLER MODELS |
DIY-09-HP-WMAH-230D25-O / DIY-12-HP-WMAH-230D25-O |
|
GTIN |
840255587617 / 840255587020 / 840255587037 |
|
UPC |
840255587617 / 840255587020 / 840255587037 |
|
UNIT TYPE |
Mini Split |
|
EQUIPMENT TYPE |
Multi-Zone Ductless Mini-Split Heat Pump |
|
TONNAGE |
1.5 |
|
COOLING CAPACITY (BTU) |
18,000 |
|
HEATING CAPACITY (BTU) |
19,000 |
|
SEER |
21 |
|
EER |
12.5 |
|
HSPF4 / HSPF5 |
10.6 / 8.6 |
|
CFM |
1764.71 |
|
VOLTAGE / PHASE / FREQUENCY |
208-230 V / 1 / 60 Hz |
|
MAX FUSE / BREAKER (A) |
25 |
|
MIN CIRCUIT AMPACITY (A) |
18 |
|
COLOR |
White |
|
ZONE CAPACITY |
2 |
|
REFRIGERANT TYPE |
R-454B |
|
REFRIGERANT VOLUME (OZ) |
65.26 |
|
DECIBEL RATING (DBA) |
59 dBA |
|
INVERTER |
Yes |
|
MIN AMBIENT COOL |
5 F ~ 122 F |
|
MIN AMBIENT HEAT |
-13 F ~ 75.2 F |
|
MAX LINESET LENGTH |
98.42 ft total |
|
LIQUID LINE SIZE |
1/4 in |
|
SUCTION LINE SIZE |
3/8 in |
|
COMPRESSOR MOTOR TYPE |
Twin-Rotary |
|
CONDENSER FAN MOTOR RPM |
750 / 600 / 500 |
|
WIFI COMPATIBILITY |
Yes |
|
APP COMPATIBILITY |
Yes |
|
WORKS WITH IOS |
Yes |
|
WORKS WITH ANDROID |
Yes |
|
REGISTERED WARRANTY |
Limited Lifetime Compressor |
|
BASE WARRANTY |
5-year Parts / 7-year Compressor |
|
BASE PARTS WARRANTY |
5-year Parts |
|
BASE COMPRESSOR WARRANTY |
7-year Compressor |
|
CONDENSER NET DIMENSIONS (D X H X W) |
13.46 x 26.50 x 35.04 in |
|
CONDENSER NET WEIGHT |
100.53 lbs |
|
CONDENSER GROSS DIMENSIONS (D X H X W) |
17.64 x 29.33 x 40.94 in |
|
CONDENSER GROSS WEIGHT |
111.11 lbs |
|
AIR HANDLER VOLTAGE (V) |
208/230 |
|
AIR HANDLER PHASE |
1 |
|
AIR HANDLER CYCLE |
60 Hz |
|
MOUNT TYPE |
Wall |
|
AIR HANDLER COLOR |
White |
|
MAX COVERAGE AREA |
400 sqft / 550 sqft |
|
OSCILLATION |
Yes |
|
FILTER TYPE |
Reusable |
|
AUXILIARY HEATER INCLUDED |
No |
|
AUXILIARY HEATER AVAILABLE |
No |
|
FAN ONLY OPTION |
Yes |
|
QUIET MODE |
Yes |
|
AUTO COOL |
Yes |
|
REMOTE CONTROL INCLUDED |
Yes |
|
UL LISTED |
Yes |
|
ETL LISTED |
Yes |
|
AHRI CERTIFIED |
Yes |
|
AIR HANDLER BASE PARTS WARRANTY |
5 years |
|
AIR HANDLER BASE COMPRESSOR WARRANTY |
7 years |
|
AIR HANDLER NET DIMENSIONS (D X H X W) |
7.44 x 11.69 x 31.57 in / 7.44 x 11.63 x 31.57 in |
|
AIR HANDLER NET WEIGHT |
24.47 lbs / 24.47 lbs |
|
AIR HANDLER GROSS DIMENSIONS (D X H X W) |
16.34 x 14.37 x 36.02 in |
|
AIR HANDLER GROSS WEIGHT |
35.05 lbs / 35.05 lbs |



















