MRCOOL® DIY® 5th Gen OuttaSight® 18K (1.5 Ton) One-Way Ceiling Cassette Heat Pump — DIY-18-HP-C-230D25-O + DIYCASSETTE18HP-230D25-O
Overview
The MRCOOL® DIY® 5th Gen OuttaSight® 18K is a one-way ceiling cassette system designed for straightforward installation using MRCOOL® DIY® Quick Connect® line sets. It’s built to fit between standard 16" ceiling joists, delivers quiet comfort, and supports control via remote, SmartHVAC app, and voice assistants.
*No vacuum claim applies when installed with compatible MRCOOL DIY QuickConnect® pre-charged line sets (see manuals for requirements).
Highlights
- DIY-friendly install: Designed to connect to MRCOOL DIY QuickConnect® line sets for simplified setup.
- One-way ceiling discharge: Ideal for rooms where directional airflow is preferred.
- Flush modern look: Fits between 16" joists for a low-profile ceiling installation.
- Smart control: WiFi + SmartHVAC app, plus Amazon Alexa and Google Assistant compatibility.
- Maintenance made easier: Elevation function lowers the filter panel for access (as described).
- Stronger heating output: Indoor unit rated up to 22,700 BTU heating.
Up to 800 sq ft*
18,800 / 22,700 BTU
22.5 SEER2
Indoor 26–44 dB(A)
*Coverage varies by climate, insulation, layout, and load. Condenser description references 500–750 sq ft for typical use.
What’s Included
- Outdoor Condenser: DIY-18-HP-C-230D25-O
- One-Way Ceiling Cassette (OuttaSight®): DIYCASSETTE18HP-230D25-O
- 25FT Pre-charged Installation Kit
- Remote Control
- Documentation (see Documents & Downloads).
Indoor Specs
Model: DIYCASSETTE18HP-230D25-O (DIY 5th Gen OuttaSight® One-Way Ceiling Cassette)
| System Type | DIY Mini Split (Indoor One-Way Ceiling Cassette) |
| Cooling / Heating Capacity | 18,800 BTU / 22,700 BTU |
| Max Coverage Area | Up to 800 sq ft |
| Airflow Direction | 1-Way |
| CFM (by speed) | 400 / 352 / 300 / 207 / 207 |
| Indoor Noise | 41.5 dB(A) (listed) • Low 26 dB(A) • High 44 dB(A) |
| WiFi / App | Yes / Yes |
| Voice Control | Amazon Alexa / Google Assistant |
| Electrical | 208–230V • 1-Phase • 60 Hz |
| Max Fuse / Breaker | 15A |
| Min Circuit Ampacity | 3A |
| Refrigerant Type | R-454B |
| Liquid / Suction Line | 1/4" / 1/2" |
| Blower Motor RPM | 1344 / 1184 / 1024 |
| Filter Type | Reusable |
| Modes | Fan Only • Quiet Mode • Sleep Mode • Auto Cool |
| Dimensions (W×D×H) | 50.31" × 13.19" × 8.98" |
| Net Weight | 45 lb |
| UPC / GTIN | UPC 840255587525 • GTIN 00840255587525 |
| Restricted States | GU; PR; VI |
| Proposition 65 Warning | Yes |
| Works With | DIY 5th Gen Systems |
Outdoor Specs
Model: DIY-18-HP-C-230D25-O (DIY 5th Gen Single-Zone Condenser)
| System Type | DIY Single-Zone Mini Split Heat Pump (Outdoor) |
| Tonnage | 1.5 Ton |
| Cooling / Heating Capacity | 18,000 BTU / 18,000 BTU |
| Efficiency | SEER2 22.5 • EER2 13.7 • HSPF2-4 11.5 • HSPF2-5 8.5 |
| Outdoor Noise | 58.5 dB(A) |
| Electrical | 208/230V • 1-Phase • 60 Hz |
| MCA / Max Breaker | 18A / 20A |
| Refrigerant | R-454B • 44.8 oz |
| Inverter | DC |
| Line Set Length | 25 ft |
| Max Line Set Length | 98.4 ft |
| Liquid / Suction Line | 1/4" / 1/2" |
| Compressor Motor Type | Rotary |
| Energy Star / AHRI | ENERGY STAR® Certified • AHRI Certified |
| Dimensions (W×D×H) | 35.04" × 13.46" × 26.5" |
| Net Weight | 93.48 lb |
| UPC / GTIN | UPC 840255586962 • GTIN 00840255586962 |
| Proposition 65 Warning | Yes |
Documents & Downloads
Important
- DIY installation concept: Designed for use with MRCOOL DIY QuickConnect® pre-charged line sets to reduce install steps.
- Electrical circuit: Outdoor unit specifies 18A MCA with a 20A max breaker.
- Line set: Listed line set length is 25 ft; max line set length is 98.4 ft.
- Proposition 65: Warning applies (see documentation).
FAQs
Does this system require vacuuming?
The cassette is described as connecting to MRCOOL® DIY® QuickConnect® pre-charged line sets, which eliminates vacuuming when installed per the manual and with compatible components.
How is it controlled?
It supports control via wireless remote, the SmartHVAC app, and voice assistants (Amazon Alexa / Google Assistant).
What line set sizes does it use?
Listed connections are 1/4" liquid and 1/2" suction.
What warranty is included?
Base coverage is listed as 5-year parts and 7-year compressor, with registered coverage listing a limited lifetime compressor (see warranty documents for terms and registration requirements).
