The MRCOOL® DIY® 5th Generation Multi-Zone 18,000 BTU system provides efficient year-round heating and cooling for two separate indoor spaces with matching 9,000 BTU air handlers. With a 23.9 SEER2 rating, DC inverter technology, and an 18,000 BTU outdoor condenser, this system is designed to provide reliable comfort while maintaining efficient operation.
Designed for convenient DIY installation, the system uses MRCOOL® pre-charged Quick Connect® line sets, allowing the system to be installed without specialized HVAC tools or extensive professional training. Each 9,000 BTU wall-mounted air handler can provide heating and cooling for spaces up to approximately 400 square feet, making the system well suited for two separate rooms.
The system features eco-friendly R-454B refrigerant, a Gold Fin® condenser, Follow Me® temperature sensing, low ambient cooling, and smartphone app controls with Amazon Alexa and Google Assistant compatibility. The 18,000 BTU condenser can support up to three indoor air handlers, providing flexibility for future expansion. Warranty coverage includes a 5-year parts warranty and 7-year compressor warranty, with Extended Limited Lifetime replacement coverage available through the MRCOOL® Care Program.
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
Specifications:
|
BRAND NAME |
MRCOOL |
|
SERIES |
DIY 5th gen Multi-Zone Mini-splits |
|
MODEL |
DIYM218HPW03D |
|
CONDENSER MODEL |
DIY-MULTI3-18HP230D-O |
|
AIR HANDLER MODEL |
DIY-09-HP-WMAH-230D25-O |
|
GTIN |
840255587617 / 840255587020 |
|
UPC |
840255587617 / 840255587020 |
|
EQUIPMENT TYPE |
Multi-Zone Ductless Mini-Split Heat Pump |
|
TONNAGE |
1.5 |
|
COOLING CAPACITY (BTU) |
18,000 |
|
HEATING CAPACITY (BTU) |
18,000 |
|
SEER2 |
23.9 |
|
EER2 |
13 |
|
HSPF2-4 |
10 |
|
HSPF2-5 |
7.8 |
|
VOLTAGE / PHASE / FREQUENCY |
208/230 V / 1 / 60 Hz |
|
MAX FUSE / BREAKER (A) |
20 |
|
MIN CIRCUIT AMPACITY (A) |
16 |
|
COLOR |
White |
|
ZONE CAPACITY |
3 |
|
REFRIGERANT TYPE |
R-454B |
|
REFRIGERANT VOLUME (OZ) |
61.73 |
|
DECIBEL RATING (DBA) |
60 |
|
INVERTER |
DC |
|
LINE SET LENGTH |
25 ft |
|
MAX LINESET LENGTH (FT) |
172.2 ft |
|
LIQUID LINE SIZE |
1/4 in |
|
SUCTION LINE SIZE |
3/8 in |
|
COMPRESSOR MOTOR TYPE |
Rotary |
|
AUXILIARY HEATER INCLUDED |
No |
|
AUXILIARY HEATER AVAILABLE |
No |
|
FAN ONLY OPTION |
Yes |
|
QUIET MODE |
Yes |
|
AUTO COOL |
Yes |
|
WIFI COMPATIBILITY |
Yes |
|
APP COMPATIBILITY |
Yes |
|
WORKS WITH IOS |
Yes |
|
WORKS WITH ANDROID |
Yes |
|
UL LISTED |
Yes |
|
ETL LISTED |
Yes |
|
ENERGY STAR CERTIFIED |
Yes |
|
AHRI CERTIFIED |
Yes |
|
REGISTERED WARRANTY |
Extended Limited Lifetime* |
|
BASE PARTS WARRANTY |
5 years |
|
BASE COMPRESSOR WARRANTY |
7 years |
|
HAS BATTERIES |
Yes |
|
CONTAINS ELECTRONICS |
Yes |
|
CONTAINS CHEMICALS |
Yes |
|
CONTAINS AEROSOL |
Yes |
|
CONTAINS COMPRESSED GAS |
Yes |
|
PROPOSITION 65 WARNING |
Yes |
|
NET DIMENSIONS (D X H X W) |
13.46 x 26.5 x 35.04 in |
|
NET WEIGHT (LBS) |
101.63 |
|
GROSS DIMENSIONS (D X H X W) |
17.24 x 29.53 x 40.55 in |
|
GROSS WEIGHT (LBS) |
109.57 |
|
AIR HANDLER VOLTAGE (V) |
208/230 |
|
AIR HANDLER PHASE |
1 |
|
AIR HANDLER CYCLE |
60 |
|
MOUNT TYPE |
Wall |
|
AIR HANDLER COLOR |
White |
|
MAX COVERAGE AREA |
400 sqft |
|
OSCILLATION |
Yes |
|
FILTER TYPE |
Reusable |
|
REMOTE CONTROL INCLUDED |
Yes |
|
AIR HANDLER NET DIMENSIONS (D X H X W) |
7.44 x 11.69 x 31.57 in |
|
AIR HANDLER NET WEIGHT (LBS) |
24.47 |
|
AIR HANDLER GROSS DIMENSIONS (D X H X W) |
16.34 x 14.37 x 36.02 in |
|
AIR HANDLER GROSS WEIGHT (LBS) |
35.05 |



















