Take Control of Your Comfort
Enjoy year-round comfort and energy efficiency with the MRCOOL DIY 5th Gen Multi-Zone Mini Split System — the easiest and most affordable way to get powerful heating and cooling without hiring a professional.
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Two Rooms, Perfect Comfort
Easily heat or cool two spaces — one up to 350 sq. ft. and another up to 750 sq. ft. — each with independent temperature control for customized comfort in every room.
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Truly DIY-Friendly
Skip the costly installations. No HVAC license or special tools required — if you can use basic hand tools, you can do it yourself.
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No-Hassle Setup
The system includes pre-charged Quick-Connect® line sets, so there’s no need for refrigerant handling or vacuuming. Just connect the lines, power up, and enjoy immediate comfort.
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Year-Round Efficiency
With up to 23 SEER2 cooling efficiency and 9.5 HSPF2-4 heating performance, this system delivers exceptional performance and impressive energy savings throughout the year.
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Built for Every Season
Stay cozy even through the coldest months — reliable heating works efficiently in temperatures as low as -13°F.
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Reliable Warranty Protection
Enjoy peace of mind with a 7-Year Compressor Replacement Warranty and 5-Year Parts Coverage.
From hot summer days to freezing winter nights, the MRCOOL DIY Mini Split keeps your home perfectly comfortable while lowering your energy bills. Smart. Simple. Affordable.
WHAT YOU GET:
MRCOOL DIY® 5th Gen 27,000 BTU 4-Zone Mini Split Condenser 230V (DIY-MULTI4-27HP230D-O)
MRCOOL DIY® 5th Gen 9,000 BTU Multi-Zone Mini Split Air Handler 230V (DIY-09-HP-WMAH-230D25-O)
MRCOOL DIY® 5th Gen 18,000 BTU Multi-Zone Mini Split Air Handler 230V (DIY-18-HP-WMAH-230D25-O)
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PRE-CHARGED LINE SETS x 2
- REMOTE CONTROL x 2
NOTE: Need different line set lengths? Click here to add them as add-ons.
SPECIFICATIONS:
| SYSTEM OVERVIEW |
| System Type |
Ductless Mini Split Air Conditioner & Heat Pump |
| Zones |
2 |
| Capacity |
Total: 27,000 BTU
Zone 1: 9,000 BTU
Zone 2: 18,000 BTU
|
| Coverage Area |
Total: 1,100 sq. ft.
Zone 1: 350 sq. ft.
Zone 2: 750 sq. ft.
|
| Refrigerant |
R-454B |
| Line Sets Included |
2 x Pre-Charged Line Sets |
| Warranty |
7 Years Compressor
5 Years Parts
|
| OUTDOOR UNIT (27K) x 1 |
| Model |
DIY-MULTI4-27HP230D-O |
| Dimensions |
37.24" W x 16.14" D x 31.89" H |
| Cooling Capacity |
26,000 BTU |
| SEER2 |
23.0 |
| EER2 |
12.0 |
| Heating Capacity |
26,000 BTU |
| HSPF2-4 |
9.5 |
| HSPF2-5 |
7.0 |
| Outdoor Noise Level |
61.0 dB(A) |
| Outdoor Operating Temperature |
Cooling: -13°F – 122°F
Heating: -13°F – 75°F
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| Voltage |
208–230V |
| Phase |
1 |
| Cycle |
60Hz |
| Min Circuit Ampacity |
23.0A |
| Max Fuse Breaker |
25.0A |
| Weight |
140.2 lbs |
| Certifications |
ENERGY STAR Certified
AHRI Certified
UL Listed
ETL Listed
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| INDOOR UNIT (9K) x 1 |
| Model |
DIY-09-HP-WMAH-230D25-O |
| Dimensions |
31.57" W x 7.44" D x 11.69" H |
| Mounting Type |
Wall |
| Cooling Capacity |
9,000 BTU |
| Heating Capacity |
9,000 BTU |
| Coverage Area |
151 to 350 sq. ft. |
| Liquid Line Size |
1/4" |
| Suction Line Size |
3/8" |
| Modes |
Auto Mode: Automatically selects heating or cooling based on the room's temperature.
Cool Mode: Lowers the room temperature to your desired setting.
Heat Mode: Raises the room temperature to your desired setting.
Fan-Only Mode: Circulates air without heating or cooling.
Dry Mode (Dehumidification): Reduces humidity levels in the room.
Sleep Mode: Gradually adjusts temperature settings for comfortable sleep and energy savings.
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| Weight |
24.47 lbs |
| INDOOR UNIT (18K) x 1 |
| Model |
DIY-18-HP-WMAH-230D25-O |
| Dimensions |
42.52" W x 8.9" D x 13.19" H |
| Mounting Type |
Wall |
| Cooling Capacity |
18,000 BTU |
| Heating Capacity |
18,000 BTU |
| Coverage Area |
501 to 750 sq. ft. |
| Liquid Line Size |
1/4" |
| Suction Line Size |
1/2" |
| Modes |
Auto Mode: Automatically selects heating or cooling based on the room's temperature.
Cool Mode: Lowers the room temperature to your desired setting.
Heat Mode: Raises the room temperature to your desired setting.
Fan-Only Mode: Circulates air without heating or cooling.
Dry Mode (Dehumidification): Reduces humidity levels in the room.
Sleep Mode: Gradually adjusts temperature settings for comfortable sleep and energy savings.
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| Weight |
35.49 lbs
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GUIDE:
SHIPPING POLICY:
Free Curbside Delivery
MRCOOL orders include free curbside delivery via FedEx Ground, FedEx Freight, or the most trusted carrier available. Please note that delivery is to the curbside only - be sure to arrange for assistance if needed, as the carrier will not bring items inside your home.
Tracking & Delivery Scheduling
In most cases, you will receive tracking details 3-5 business days after you place your order. When the tracking number is sent, please allow 1-2 business days for the tracking number to populate details.
RETURN POLICY:
MRCOOL returns must be requested within 30 days of your delivery date. We are unable to process returns submitted after this period. Products must be unused, uninstalled, and in their original packaging, including the box and pallet, to qualify for a return.
Restocking Fee
Please note, a 35% restocking fee will be applied to all approved returns.
Non-Returnable Items
Accessories including lineguards, wall mounts, linesets, couplers, and similar items are not eligible for return.
