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
- DIY 5th Gen Ceiling Cassette Brochure (EN)
- DIY 5th Gen Ceiling Cassette Installation & User Manual (EN)
- DIY 5th Gen Ceiling Cassette Performance / Specs (EN)
- Ceiling Cassette Remote Manual (EN)
- DIY 5th Gen Ceiling Cassette Service Manual (EN)
- DIY 5th Gen Warranty (EN)
- DIY 5th Gen Ceiling Cassette Install Manual (SP)
- Ceiling Cassette Remote Manual (SP)
- DIY 5th Gen Warranty (SP)
- AHRI Certificate (PDF)
- EnergyGuide (PDF)
- DIY 5th Gen System Brochure (EN)
- DIY 5th Gen Single-Zone Install Manual (EN)
- DIY 5th Gen Single-Zone Performance / Specs (EN)
- DIY 5th Gen Quick Start / Owner Guide (EN)
- DIY 5th Gen Remote Manual (EN)
- DIY 5th Gen Single-Zone Service Manual (EN)
- Accessory Manual (EN/FR)
- AHRI Certificate (Outdoor Unit) (PDF)
- EnergyGuide (Outdoor Unit) (PDF)
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).
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We will prepare your order within 24 hours if it’s received on a weekday (before noon). Orders are shipped in one to two business days. Transit time is between 3 to 6 business days, although exceptions apply. We email tracking information once your purchase is shipped.
Delivery Map
IMPORTANT DELIVERY INFORMATION: Please be kindly informed that this air conditioner, due to its weight and shipping restrictions, is shipped palletized with an arranged freight service and requires an appointment for delivery. To AVOID delays, please check if the provided phone number in the order details is a current number where you can be reached. You can also contact the carrier directly and refer to your tracking number to set up a date and time for your appointment. It is your responsibility to ensure a safe and secure environment for delivery. Please note that we cannot be held liable for any packages that are stolen or lost after delivery has been confirmed. PLEASE verify your shipping address, as changes to the address after freight has shipped can result in an additional 15% or higher fee depending on freight weight and dimensions.
SMALLWARES INFORMATION: Please be informed that for smaller items, such as Installation Kits, Smart Connectivity Dongles, and TTW Sleeves, when these items are ordered individually, they may be shipped via FedEx without a signature requirement. It is your responsibility to ensure a safe and secure environment for delivery. Please note that we cannot be held liable for any packages that are stolen or lost after delivery has been confirmed. Thank you for your understanding and cooperation.
INSPECT YOUR MERCHANDISE BEFORE SIGNING: Please inspect your boxes thoroughly when you receive them. They should arrive shrink-wrapped and on a pallet. If you notice any damages or imperfections (e.g. crushed box or forklift hole), please write comments on the receipt before signing for delivery, no matter how small damages seem. Contact us immediately to assist you.
Shipping & Delivery
We will prepare your order within 24–48 hours if it’s received on a weekday (before noon). Orders are shipped in one to two business days. Transit time is between 3 to 6 business days, although exceptions apply. We email tracking information once your purchase is shipped.
Delivery Map
IMPORTANT DELIVERY INFORMATION
Please be informed that this air conditioner, due to its weight and shipping restrictions, is shipped palletized with an arranged freight service and requires an appointment for delivery.
To AVOID delays, please make sure the phone number in your order details is accurate and one where you can be reached. You may also contact the carrier directly using your tracking number to schedule your delivery.
It is your responsibility to ensure a safe and secure delivery environment. We are not liable for any packages that are stolen or lost after delivery is confirmed.
Please verify your shipping address carefully. Changes to your shipping address after the freight has been shipped may result in additional fees of 15% or more, depending on freight weight and dimensions.
SMALLWARES INFORMATION
Smaller items such as Installation Kits, Smart Connectivity Dongles, and TTW Sleeves may be shipped via FedEx without a signature requirement if ordered individually.
It is your responsibility to ensure a safe delivery location. We are not liable for packages lost or stolen after delivery confirmation. Thank you for your understanding and cooperation.
INSPECT YOUR MERCHANDISE BEFORE SIGNING
Please inspect your boxes carefully upon delivery. Shipments should arrive shrink-wrapped and on a pallet. If you notice any damage or signs of mishandling (such as a crushed box or forklift puncture), write comments on the delivery receipt before signing, even if the damage appears minor.
Contact us immediately if any issues arise so we can assist you promptly.
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