MRCOOL
MRCOOL DIY Select 1st Gen - R454B - 18K BTU 230V White Wall Mount Air handler + Condenser
1.5 Ton | SEER2 17.3 | R-454B | 208/230V
- 17000 BTU cooling capacity
- Up to 17.3 SEER2 rated efficiency
- Uses R-454B refrigerant
- Runs on 208/230V power
Key Specifications
Product Overview
MRCOOL DIY Select 1st Gen - R454B - 18K BTU 230V White Wall Mount Air handler + Condenser.
What this system is
- DIYS-18-HP-C-230A11-O — DIY Select 1st Gen - R454B - 18K BTU 230V Condenser w/ 11ft Install Kit
- DIYS-18-HP-WMAH-230A13-O — DIY Select 1st Gen - R454B - 18K BTU 230V White Wall Mounted Air Handler - with 13' Communication Cable
Outdoor condenser — DIYS-18-HP-C-230A11-O
The MRCOOL® DIY® Select 18K BTU 230V Ductless Heat Pump Single Zone Mini-Split Condenser is designed to make HVAC installation simple and accessible for homeowners. Built for true do-it-yourself installation, it requires no specialized tools, certifications, or prior HVAC experience. Ideal for garages, home offices, studios, and similar spaces, it delivers reliable heating and cooling for areas up to 800 square feet.
Despite its DIY®-friendly design, the system delivers strong performance with a 17.3 SEER2 cooling rating and 8.5 HSPF2-4 heating efficiency, providing consistent, energy-efficient comfort year-round while helping control utility costs.
Installation is further simplified with an 11.5-foot Quick Connect® line set that arrives factory pre-charged with environmentally friendly R-454B refrigerant, eliminating the need for vacuum pumps or refrigerant handling. Most components are included, making setup faster and more approachable for first-time installers.
Comfort control is easy using the included wireless remote or the MRCOOL® Comfort app, which allows remote temperature control, scheduling, and energy monitoring. Compatibility with Amazon Alexa and Google Assistant adds hands-free convenience.
Features like Sleep Mode, Dry Mode, Auto, and a Gold Fin® condenser coating enhance comfort and durability, even in humid or coastal environments.
For added peace of mind, the MRCOOL® DIY® Select system is backed by a 2-year compressor warranty and a 1-year parts warranty.
| Model number | DIYS-18-HP-C-230A11-O |
|---|---|
| UPC | 840255595681 |
| Series | DIY Select |
| Unit type | Mini-Split |
| Equipment type | Condenser |
| Refrigerant | R-454B |
| Refrigerant charge (oz) | 34.92 |
| Nominal tonnage | 1.5 |
| Cooling capacity (BTU/h) | 17000 |
| Heating capacity (BTU/h) | 18000 |
| SEER2 | 17.3 |
| EER2 | 9 |
| HSPF2 (region IV) | 8.5 |
| HSPF2 (region V) | 6.5 |
| Voltage | 208/230 |
| Phase | 1 |
| Cycle (Hz) | 60 |
| Min circuit ampacity (A) | 15 |
| Max fuse / breaker (A) | 20 |
| Compressor type | Rotary |
| Inverter | Yes |
| Metering device | EEV |
| Liquid line size (in) | 1/4 |
| Suction line size (in) | 1/2 |
| Line set included (ft) | 11.5 ft. |
| Max line set length (ft) | 75 ft. |
| Sound level (dBA) | 55 |
| Colour | White |
| AHRI certified | Yes |
| ENERGY STAR certified | No |
| UL listed | Yes |
| ETL listed | Yes |
| Parts warranty (years) | 1 Year Parts |
| Compressor warranty (yrs) | 2 Years Compressor |
| Net W x H x D (in) | 30.12 x 21.85 x 11.93 |
| Net weight (lbs) | 62.61 |
| Shipping W x H x D (in) | 35.04 x 29.13 x 13.46 |
| Shipping weight (lbs) | 82.23 |
Indoor unit — DIYS-18-HP-WMAH-230A13-O
The MRCOOL® DIY® Select 18K BTU 230V Ductless Mini-Split Heat Pump Air Handler delivers efficient, reliable heating and cooling for spaces up to 800 square feet. Ideal for garages, attics, basements, and bonus rooms, it provides consistent year-round comfort with simple operation and high efficiency.
Designed within the MRCOOL® DIY® lineup, this system supports true do-it-yourself installation. The compatible Quick Connect® line set comes factory pre-charged with environmentally friendly R-454B, eliminating the need for vacuum pumps or refrigerant handling. Additionally, the included 13-foot DIYPRO® cable replaces traditional electrical conduit, streamlining installation while safeguarding wiring from moisture, pests, and everyday wear.
Control your comfort easily with the included wireless remote or the MRCOOL® Comfort app, which allows you to adjust temperatures, set schedules, and monitor energy usage from anywhere. Compatibility with Amazon Alexa and Google Assistant enables convenient hands-free voice control.
Advanced features like Dry Mode, Sleep Mode, Auto Mode, and programmable scheduling enhance comfort while optimizing efficiency. A Gold Fin® condenser coating adds corrosion resistance, making the system well-suited for humid or coastal environments.
The MRCOOL® DIY® Select 18K includes a 2-year compressor warranty and 1-year parts warranty.
| Model number | DIYS-18-HP-WMAH-230A13-O |
|---|---|
| UPC | 840255595636 |
| Series | DIY Select |
| Unit type | Mini-Split |
| Equipment type | Air Handler |
| Refrigerant | R-454B |
| Nominal tonnage | 1.5 |
| Airflow (CFM) | 470.9 / 400.2 / 329.6 / 270.8 |
| Voltage | 208/230 |
| Phase | 1 |
| Cycle (Hz) | 60 |
| Min circuit ampacity (A) | 3 |
| Max fuse / breaker (A) | 15 |
| Blower motor type | DC |
| Liquid line size (in) | 1/4 |
| Suction line size (in) | 1/2 |
| Filter type | Reusable |
| Max coverage area | 800 sq. ft. |
| Sound level low (dBA) | 18.5 |
| Sound level high (dBA) | 46.5 |
| Colour | White |
| Wi-Fi capable | Yes |
| Remote included | Yes |
| Parts warranty (years) | 1 Year Parts |
| Net W x H x D (in) | 38.23 x 12.64 x 8.98 |
| Net weight (lbs) | 30.64 |
| Shipping W x H x D (in) | 46.73 x 17.68 x 14.09 |
| Shipping weight (lbs) | 44.97 |
Documents
- Installation manual (DIYS-18-HP-C-230A11-O) (PDF)
- Service manual (DIYS-18-HP-C-230A11-O) (PDF)
- Remote manual (DIYS-18-HP-C-230A11-O) (PDF)
- Brochure (DIYS-18-HP-C-230A11-O) (PDF)
- Warranty (DIYS-18-HP-C-230A11-O) (PDF)
- AHRI certificate (DIYS-18-HP-C-230A11-O) (PDF)
- EnergyGuide label (DIYS-18-HP-C-230A11-O) (PDF)
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.
Technical Specifications
Performance
| System Type | Mini-Split |
|---|---|
| Capacity | 17000 BTU |
| Tonnage | 1.5 Ton |
| SEER2 | 17.3 |
| EER2 | 9 |
| HSPF2 | 8.5 |
Electrical & Fuel
| Voltage | 208/230V |
|---|---|
| Phase | Single Phase |
| Refrigerant | R-454B |
Shipping & Delivery
Installation video
Published by MRCOOL. Watch the full walkthrough before you start, and follow the installation manual for this model — the video is a guide, not a substitute for it.
Manufacturer Warranty
Covered by MRCOOL's limited warranty. Warranty terms are set by MRCOOL and differ by product line — whether registration is required, and whether the installation has to be performed by a state-licensed HVAC contractor, is not the same across the range. In every case coverage depends on the unit being installed according to MRCOOL's instructions and all applicable codes and permits. MRCOOL's warranty document for this model is the controlling source; ask us and we'll send you the one that applies.
Professional Installation Recommended
Most HVAC equipment must be installed and connected by a licensed professional to remain safe, code-compliant, and eligible for manufacturer warranty coverage. If you're unsure about installation requirements, contact us before you order.
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