MRCOOL
MRCOOL DIY Select 1st Gen - R454B - 18K BTU 230V White Wall Mounted Air Handler - with 13' Communication Cable
DIYS-18-HP-WMAH-230A13-O
18,000 BTU · 208/230V · R-454B
Part of DIY Select – Air Handlers
- Cooling capacity
- 18,000 BTU1.5 tons
- Room size
- 800 sq ft
- Power
- 208/230V15A breaker
- Refrigerant
- R-454B
- Install
- DIYPre-charged, no vacuum
$482.86 each
Not sure about the size? Use the BTU sizing calculator, or call us and we'll size it with you. This is a DIY system: the pre-charged line set connects without a vacuum pump or gauges.
Build a multi-zone system with this air handler →
Distributor pricing and stock: call 678-467-5515 or email sales@discountkings.net.
About this product
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.
Documents & manuals
Specifications
| Type | Air handler (indoor unit) — heat pump (heats & cools) |
|---|---|
| Series | DIY Select |
| Cooling capacity | 18,000 BTU |
| Nominal size | 1.5 tons |
| Zones | Single zone |
| Coverage | 800 sq. ft. |
| Airflow | 470.9 / 400.2 / 329.6 / 270.8 CFM |
| Sound level | 18.5–46.5 dBA |
| Voltage | 208/230V |
|---|---|
| Phase | 1-phase |
| Min. circuit ampacity (MCA) | 3 A |
| Max. breaker (MOP) | 15 A |
| Wi-Fi / app control | Yes |
| Refrigerant | R-454B |
|---|---|
| Liquid line | 1/4" |
| Suction line | 1/2" |
| Installation | DIY — pre-charged quick-connect line set, no vacuum pump needed |
| Dimensions (in) | 38.23 W × 8.98 D × 12.64 H |
|---|---|
| Weight | 30.64 lb |
| Shipping weight | 44.97 lb |
| Color | White |
| Parts warranty | 1 years |
|---|---|
| UPC | 840255595636 |

