System Highlights
- Graduated Zone Sizing: A 6K cassette for a small room (up to 200 sq. ft.), a 9K for a mid-size space (up to 400 sq. ft.), and a 12K for a larger main area (up to 550 sq. ft.).
- Flush Ceiling Integration: Low-profile cassettes fit between 16" joists for a clean architectural finish — no ductwork, no wall penetrations.
- Expansion Headroom: The 36K condenser supports up to five zones, leaving two ports open for future handlers.
- 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, so no electrical conduit is required.
- 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.
Built for three differently sized rooms under a single condenser — with room to add two more zones later.
What’s Included
- 1 × DIY-MULTI5-36HP230D-O — 36K BTU Multi-Zone Condenser, 230V (5-zone capable)
- 1 × DIYCASSETTE06HP-230D25-O — 6K BTU OuttaSight® One-Way Ceiling Cassette, 230V
- 1 × DIYCASSETTE09HP-230D25-O — 9K BTU OuttaSight® One-Way Ceiling Cassette, 230V
- 1 × DIYCASSETTE12HP-230D25-O — 12K 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-MULTI5-36HP230D-O
| SEER2 / EER2 | 23 / 12 |
|---|---|
| HSPF2-4 / HSPF2-5 | 9.9 / 7.5 |
| Cooling / Heating Capacity | 34,000 BTU / 36,000 BTU |
| Tonnage | 3.0 |
| Zone Capacity | 5 (3 used in this kit) |
| Electrical | 208–230V, 1 Phase, 60 Hz |
| Max Fuse Breaker / MCA | 35A / 30.5A |
| Refrigerant | R-454B, 104.75 oz (pre-charged) |
| Compressor / Inverter | Rotary / DC |
| Sound Level | 64 dBA |
| Max Total Line Set Length | 221.4 ft |
| Net Dimensions (D×H×W) | 16.14" × 31.89" × 37.24" |
| Net Weight | 169.24 lbs |
Zone Configuration
| Specification | Zone 1 — 6K | Zone 2 — 9K | Zone 3 — 12K |
|---|---|---|---|
| Model | DIYCASSETTE06HP-230D25-O | DIYCASSETTE09HP-230D25-O | DIYCASSETTE12HP-230D25-O |
| Coverage Area | Up to 200 sq. ft. | Up to 400 sq. ft. | Up to 550 sq. ft. |
| CFM | 341 / 294 / 259 / 235 / 235 | 341 / 294 / 259 / 235 / 235 | 353 / 312 / 283 / 247 / 177 |
| Sound Level | 35.5 dBA (23.5–46.5) | 36 dBA (24–38) | 37 dBA (24–41) |
| Blower Motor RPM | 1024 / 944 / 784 | 1104 / 994 / 784 | 1075 / 982 / 797 |
| Rated Load | 0.8 | 0.8 | 1.0 |
| Line Set Sizes | 1/4" Liquid • 3/8" Suction | 1/4" Liquid • 3/8" Suction | 1/4" Liquid • 3/8" Suction |
| Dimensions & Weight | 50.31"W × 13.19"D × 8.98"H (45 lbs) | 50.31"W × 13.19"D × 8.98"H (45 lbs) | 50.31"W × 13.19"D × 8.98"H (45 lbs) |
All three zones share the same 1/4" × 3/8" line set family, so any length combination below is valid.
Line Set Options
Every option is pre-charged with R-454B and includes the DIYPro® cable, eliminating the need for electrical conduit.
| Length | Model |
|---|---|
| 25 ft | DIY25-1438C-O |
| 35 ft | DIY35-1438C-O |
| 50 ft | DIY50-1438C-O |
Engineering & Warranty
- Gold Fin® Corrosion Protection: Protective coating shields the condenser coil against humidity and coastal salt exposure.
- DC Inverter Drive: The variable-speed rotary compressor scales output to match thermal load, avoiding hard current-draw spikes.
- R-454B Refrigerant: Next-generation refrigerant with improved efficiency and lower environmental impact than R-410A.
- Advanced Filtration: Reusable filters with Elevation-function access improve indoor air quality without complicating maintenance.
- Certifications: Intertek listed 5031495, UL Listed, ETL Listed, ENERGY STAR® certified, AHRI certified.
- Warranty: 5-year parts and 7-year compressor coverage, with eligibility 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.
