Mr. Cool Advantage 12,000 BTU 21.2 SEER2 Wall Mounted Heat Pump System (115V) - R454B

MRCOOL® A-12-HP-WMAH-115D-O & A-12-HP-C-115D-O Advantage 5th Gen 12,000 BTU 115V – R-454B Ductless Mini-Split Heat Pump System (Air Handler + Condenser)
The MRCOOL® A-12-HP-WMAH-115D-O & A-12-HP-C-115D-O Advantage 12k BTU 115V delivers efficient, quiet, year-round comfort for rooms up to 550 sq ft. Using eco-friendly R-454B (≈80% lower GWP than R-410A), this ductless system achieves up to 21.2 SEER2 and 8.7 HSPF2-4 to reduce energy use and costs. Built-in Wi-Fi enables app and voice control (Alexa/Google). Professional installation of the condenser is required, and the ductless design helps keep installs quicker and more affordable. Backed by MRCOOL®’s warranty—1 year parts, 2 years compressor, 1 year remote—with optional Limited Lifetime coverage via the MRCOOL® Care Program.

General Information

System Type: Ductless mini-split heat pump (indoor air handler + outdoor condenser)
Indoor Model: 5th Gen 12k BTU 115V Advantage Air Handler A-12-HP-WMAH-115D-O
Outdoor Model: 5th Gen 12k BTU 115V Advantage Condenser

A-12-HP-C-115D-O
Capacity: 12,000 BTU Cooling / Heating
Room Size: Up to ~550 sq ft
Operating Modes: Heating & Cooling
Refrigerant: R-454B (low GWP)
Voltage: 115V

Key Features

Eco-Forward Refrigerant: R-454B for higher efficiency and lower environmental impact
High Efficiency: Up to 21.2 SEER2 and 8.7 HSPF2-4
Quiet Operation: Comfortable performance ideal for living areas and bedrooms
Smart Control: Built-in Wi-Fi; control via app, Amazon Alexa, and Google Assistant
Ductless Convenience: Faster, simpler pro installation than central systems
Targeted Comfort: Optimized for single-zone spaces up to ~550 sq ft
Warranty Protection: 1-year parts, 2-year compressor, 1-year remote (with registration); Limited Lifetime available via MRCOOL® Care Program

Specifications (Rated Conditions)

Cooling Capacity: 12,000 BTU
Heating Capacity: 12,000 BTU
SEER2: Up to 21.2
HSPF2-4: 8.7
Voltage: 115V
Coverage Area: Up to ~550 sq ft
Refrigerant: R-454B

Included Components

5th Gen 12k BTU 115V Advantage indoor air handler

A-12-HP-WMAH-115D-O
5th Gen 12k BTU 115V Advantage outdoor condenser

A-12-HP-C-115D-O
Wireless remote control

Ideal For
Homeowners wanting a quiet, energy-efficient, and eco-conscious ductless mini-split for medium rooms or studios up to ~550 sq ft, with modern Wi-Fi/voice control and dependable MRCOOL® warranty support.