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MRCOOL

MRCOOL DIY Select 1st Gen - R454B - 18K BTU 230V Black Wall Mounted Air Handler - with 13' Communication Cable

DIYS-18-HP-B-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 in black delivers powerful, energy-efficient heating and cooling for spaces up to 800 square feet. Its sleek, modern finish blends seamlessly into a variety of interiors, making it an excellent choice for garages, attics, basements, bonus rooms, and larger living areas. Designed for year-round performance, it provides consistent comfort while helping reduce energy consumption and utility costs. As part of the MRCOOL® DIY® series, this system is built 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, gauges, or specialized tools to simplify installation. The included 13-foot DIYPRO® cable further streamlines installation by removing the need for electrical conduit while protecting wiring from moisture, outdoor exposure, pests, and everyday wear. This added durability supports long-term reliability and a clean, professional-looking setup. 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 durability. Backed by a 2-year compressor and 1-year parts warranty, it offers a reliable, cost-effective comfort solution.

Documents & manuals

Specifications

Capacity & efficiency
TypeAir handler (indoor unit) — heat pump (heats & cools)
SeriesDIY Select
Cooling capacity18,000 BTU
Nominal size1.5 tons
ZonesSingle zone
Coverage800 sq. ft.
Airflow470.9 / 400.2 / 329.6 / 270.8 CFM
Sound level18.5–46.5 dBA
Electrical
Voltage208/230V
Phase1-phase
Min. circuit ampacity (MCA)3 A
Max. breaker (MOP)15 A
Wi-Fi / app controlYes
Refrigerant & line set
RefrigerantR-454B
Liquid line1/4"
Suction line1/2"
InstallationDIY — pre-charged quick-connect line set, no vacuum pump needed
Physical
Dimensions (in)38.23 W × 8.98 D × 12.64 H
Weight30.64 lb
Shipping weight44.97 lb
ColorBlack
Certifications, warranty & ordering
Parts warranty1 years
UPC840433619932