System Highlights
- Balanced Symmetrical Zoning: Three matched 9K cassettes, each covering up to 400 sq. ft., for even comfort across three similarly sized rooms.
- Right-Sized Condenser: The 27K unit matches the connected load closely, keeping the system compact and efficient without paying for unused capacity.
- Flush Ceiling Integration: Low-profile cassettes fit between 16" joists for a clean architectural finish — no ductwork, no wall penetrations.
- True DIY Installation: Patented pre-charged Quick Connect® line sets eliminate vacuuming, charging, and professional trade labor. Every line set in this kit includes the DIYPro® cable.
- Elevation Filter Access: The panel lowers on demand so filters can be cleaned without dismantling the unit.
- Smart Control: Wireless remotes, the SmartHVAC app for iOS and Android, plus Amazon Alexa and Google Assistant support out of the box.
What's Included
- 1 × DIY-MULTI4-27HP230D-O — 27K BTU Multi-Zone Condenser, 230V (4-zone capable)
- 3 × DIYCASSETTE09HP-230D25-O — 9K BTU OuttaSight® One-Way Ceiling Cassette, 230V
- 3 × Pre-charged 1/4" × 3/8" Quick Connect® line sets with DIYPro® cable — lengths selected above
- Wireless remotes, mounting hardware, and installation documentation
Condenser Specifications — DIY-MULTI4-27HP230D-O
| SEER2 / EER2 | 23 / 12 |
|---|---|
| HSPF2-4 / HSPF2-5 | 9.5 / 7.0 |
| Cooling / Heating Capacity | 26,000 BTU / 26,000 BTU |
| Tonnage | 2.25 |
| Zone Capacity | 4 (3 used in this kit) |
| Electrical | 208–230V, 1 Phase, 60 Hz |
| Max Fuse Breaker / MCA | 25A / 23A |
| Refrigerant | R-454B, 84.66 oz (pre-charged) |
| Compressor / Inverter | Rotary / DC |
| Sound Level | 61 dBA |
| Max Total Line Set Length | 221.4 ft |
| Net Dimensions (D×H×W) | 16.14" × 31.89" × 37.24" |
| Net Weight | 140.21 lbs |
Zone Configuration — DIYCASSETTE09HP-230D25-O (×3)
| Capacity / Coverage | 9,000 BTU — up to 400 sq. ft. per zone |
|---|---|
| Air Flow Direction | 1-Way |
| CFM | 341 / 294 / 259 / 235 / 235 |
| Sound Level | 36 dBA (24 low / 38 high) |
| Blower Motor RPM | 1104 / 994 / 784 |
| Rated Load | 0.8 |
| Line Set Sizes | 1/4" Liquid • 3/8" Suction |
| Dimensions & Weight | 50.31"W × 13.19"D × 8.98"H (45 lbs each) |
Line Set Options
| Length | Model |
|---|---|
| 25 ft | DIY25-1438C-O |
| 35 ft | DIY35-1438C-O |
| 50 ft | DIY50-1438C-O |
All line sets ship pre-charged with R-454B and include the DIYPro® cable.
Engineering & Warranty
- Gold Fin® Corrosion Protection against humidity and coastal salt exposure.
- DC Inverter Drive scales output to match thermal load.
- R-454B Refrigerant — more efficient and eco-friendly than R-410A.
- Certifications: Intertek listed 5031495, UL Listed, ETL Listed, ENERGY STAR® certified, AHRI certified.
- Warranty: 5-year parts and 7-year compressor coverage, eligible for the MRCOOL® Care Program.
Shipping restrictions: Ceiling cassettes cannot be shipped to Guam, Puerto Rico, or the U.S. Virgin Islands.
Proposition 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Proposition 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Download the MRCOOL Brochure
Get the full official MRCOOL DIY 5th Generation Brochure PDF — specs, lineup, and details.
