MRCOOL DIY 5th Gen E Star 18,000 BTU Single Zone Mini Split Complete System with Ceiling Cassette Air Handler, 25 Ft. Line Set, 230V - DIY-18-HP-CM-230D25-O
Introducing the 5th Gen MRCOOL® DIY® 18K BTU Single Zone Mini-Split with Ceiling Cassette Air Handler for year-round heating and cooling in spaces 500 to 750 sq. ft. Easy DIY installation with included 25 ft. QuickConnect® line set and DIYPRO® cable. Customize comfort with wireless remote, SmartHVAC app, or voice commands. Industry-leading warranty for reliable, energy-efficient performance.
Features
-
DIY Installation: Easy, tool-free setup with no prior experience required.
-
DIY® QuickConnect® Line Set: Pre-charged with R-454B refrigerant for quick and vacuum-free installation.
-
Environmentally Friendly Refrigerant: R-454B refrigerant has a lower Global Warming Potential (GWP) than older refrigerants like R-410A, reducing environmental impact while improving energy efficiency.
-
DIYPRO® Cable: Eliminates the need for electrical conduit, offering enhanced durability against outdoor elements and wildlife.
-
Wireless Control Options: Use the included remote, SmartHVAC app (Apple and Android), or voice commands via Amazon Alexa and Google Assistant.
-
Follow Me Function: Maintains consistent comfort by adjusting airflow based on the remote’s location.
-
Dry Mode: Acts as a dehumidifier to reduce excess moisture and improve indoor air quality.
-
Gold Fin® Condenser: Provides corrosion resistance for coastal homes, ensuring long-lasting performance.
-
Industry-Leading Warranty: Limited lifetime warranty, 7-year compressor warranty, and 5-year parts warranty.
-
Certified Quality: Intertek listed 5031495 for reliable performance and safety.
Specifications
| Dimensions & Weight |
| Condenser Dimensions |
35.04 W" x 13.46 D" x 26.50 H" |
| Air Handler Dimensions |
13.19" D x 8.98" H x 50.31" W |
| Condenser Weight |
93.48 lbs |
| Air Handler Weight |
45 lbs |
| Capacity & Performance |
| Zone Capacity |
1 |
| Cooling Capacity |
18,000 BTU |
| EER2 |
13.7 |
| SEER2 |
22.5 |
| Heating Capacity |
18,000 BTU |
| HSPF2-4 |
11.5 |
| HSPF2-5 |
8.5 |
| Coverage Area |
500 to 750 sq ft. |
| Outdoor Noise Level |
58.5 dB(A) |
| Indoor Noise Level (Hi/Mi/Lo) |
54.5/44.5/40.5/30.5/19.0 dB(A) |
| Electrical Requirements |
| Voltage |
208-230V |
| Phase |
1 |
| Cycle |
60 Hz |
| Max Fuse Breaker |
20A |
| Min Circuit Ampacity |
18A |
| Refrigerant & Piping |
| Refrigerant Type |
R-454B |
| Refrigerant Volume |
44.80 oz |
| Liquid Line Size |
1/4" |
| Suction Line Size |
1/2" |
| Max Line Set Length |
98.4 ft. |
| Features |
| Inverter |
DC |
| Compressor Type |
Rotary |
| Fan Only Option |
Yes |
| Quiet Mode |
Yes |
| Auto Cool |
Yes |
| Wifi Compatibility |
Yes |
| App Compatibility |
Yes |
| Works with IOS |
Yes |
| Works with Android |
Yes |
| Remote Control Included |
Yes |
What our Experts Think
-
Perfect Mid-Size Solution – With 18,000 BTU, this single-zone system is ideal for bedrooms, offices, or medium living spaces.
-
Energy Star Certified – High efficiency means lower utility bills and eco-friendly performance.
-
Ceiling Cassette Comfort – Discreet design frees up wall space while delivering even air distribution.
-
DIY-Friendly Install – Includes a 25 ft. pre-charged line set for quick, tool-free installation without special equipment.
-
Year-Round Use – Heat pump design ensures reliable cooling in summer and efficient heating in winter.
Q&A
Q: What size room does this 18,000 BTU system cover?
A: It efficiently heats and cools areas up to 750 sq. ft..
Q: Does this model come with a pre-charged line set?
A: Yes, it includes a 25 ft. pre-charged No-Vac line set for hassle-free DIY installation.
Q: What type of air handler does it use?
A: This model features a slim ceiling cassette air handler for discreet, space-saving comfort.
Q: Is it Energy Star certified?
A: Yes, it is Energy Star rated, ensuring high efficiency and energy savings.
Q: Can it heat as well as cool?
A: Absolutely — it functions as a heat pump, providing year-round comfort.
Q: Who is this unit best for?
A: Homeowners wanting a DIY-friendly, efficient ceiling cassette mini split for single-zone climate control.
Maintenance Tips
-
Clean or replace the air filters every 1–2 months for peak airflow and efficiency.
-
Wipe ceiling cassette panels and vents to prevent dust buildup.
-
Check the 25 ft. pre-charged line set for secure, leak-free connections.
-
Inspect the condensate drain regularly to avoid clogs and water leaks.
-
Keep the outdoor condenser free from debris, leaves, and obstructions.
-
Test the remote or smart controls to ensure smooth operation.
-
Schedule annual professional servicing to maintain SEER performance and extend system life.
