MRCOOL
MRCOOL DIY Select 1st Gen - R454B - 12K BTU 115V Black Wall Mounted Air Handler - with 13' Communication Cable
DIYS-12-HP-B-WMAH-115A13-O
12,000 BTU · 115V · R-454B
Part of DIY Select – Air Handlers
- Cooling capacity
- 12,000 BTU1 ton
- Room size
- 550 sq ft
- Power
- 115V15A breaker
- Refrigerant
- R-454B
- Install
- DIYPre-charged, no vacuum
$399.04 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 12K BTU 115V Ductless Mini-Split Heat Pump Air Handler in black delivers powerful, energy-efficient heating and cooling for spaces up to 550 square feet. Its sleek, modern design blends easily into a variety of interiors, making it an excellent choice for attics, garages, home offices, and similar spaces. Built for year-round comfort, it maintains consistent temperatures while helping reduce energy consumption and overall utility costs. As part of the MRCOOL® DIY® lineup, this system is engineered for true do-it-yourself installation. It pairs with Quick Connect® line sets that come factory pre-charged with R-454B refrigerant, eliminating the need for vacuum pumps, specialized tools, or refrigerant handling to streamline installation. The included 13-foot DIYPRO® cable further enhances installation by eliminating the need for electrical conduit while protecting wiring from moisture, pests, and outdoor exposure. This added durability helps ensure long-term reliability and a clean, professional-looking setup. Comfort control is simple and flexible with the included wireless remote or the MRCOOL® Comfort app. Users can adjust temperatures, set schedules, and monitor energy usage from anywhere, while compatibility with Amazon Alexa and Google Assistant allows for convenient voice control. Additional features like Dry Mode, Sleep Mode, Auto Mode, and programmable scheduling help maintain a balanced indoor environment while optimizing efficiency. The system is designed for lasting performance. Backed by a 2-year compressor and 1-year parts warranty, it offers a dependable, cost-effective comfort solution.
Documents & manuals
Specifications
| Type | Air handler (indoor unit) — heat pump (heats & cools) |
|---|---|
| Series | DIY Select |
| Cooling capacity | 12,000 BTU |
| Nominal size | 1 ton |
| Zones | Single zone |
| Coverage | 550 sq. ft. |
| Airflow | 353.2 / 294.3 / 235.4 / 176.6 / 129.5 CFM |
| Sound level | 17.5–44.5 dBA |
| Voltage | 115V |
|---|---|
| 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 | 3/8" |
| Installation | DIY — pre-charged quick-connect line set, no vacuum pump needed |
| Dimensions (in) | 31.57 W × 7.87 D × 11.61 H |
|---|---|
| Weight | 24.91 lb |
| Shipping weight | 35.71 lb |
| Color | Black |
| Parts warranty | 1 years |
|---|---|
| UPC | 840433619925 |

