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MRCOOL® DIY 12K BTU Air Handler | 230V | Wall Mount Indoor Unit

Product Overview

The MRCOOL DIY 12K BTU Air Handler is the indoor component for a powerful DIY mini‑split system. This 230V wall‑mounted unit efficiently heats and cools spaces up to 550 sq. ft., making it ideal for living rooms, large bedrooms, or open‑plan areas. Engineered for simple DIY installation, it’s designed to pair seamlessly with a compatible MRCOOL outdoor condenser using the QuickConnect® system—no special tools or HVAC experience required.

Key Features & Benefits

✅ High‑Capacity Performance – 12,000 BTU output provides robust heating and cooling for medium to large rooms.

✅ Follow Me® Comfort Technology – The included remote acts as a smart sensor, directing airflow to maintain consistent temperature right where you are in the room.

✅ Dry Mode Humidity Control – Operates as a quiet dehumidifier to remove excess moisture, improving comfort and indoor air quality.

✅ Multiple Smart Control Options

• Included wireless remote

• SmartHVAC app for iOS and Android

• Voice commands via Amazon Alexa and Google Assistant

✅ DIYPro® Cable Included – Combines power and communication wiring into one durable cable—no separate electrical conduit needed.

✅ Gold Fin® Compatible – Designed to work with MRCOOL outdoor condensers featuring corrosion‑resistant Gold Fin® technology, ideal for coastal or humid climates.

✅ QuickConnect® Ready – Simplified, vacuum‑free refrigerant line connections (line set sold separately).

✅ 230V Electrical System – Delivers efficient, high‑performance operation for larger spaces.

✅ Strong Warranty Protection – Backed by a 5‑year parts warranty (indoor unit), plus system‑wide 7‑year compressor and limited lifetime outdoor coil warranties.

Technical Specifications

• Model Type: Indoor Air Handler (Wall Mount) | 5th Generation

• Capacity: 12,000 BTU

• Voltage: 230V

• Coverage: Up to 550 sq. ft.

• Refrigerant Connection: QuickConnect® compatible (uses R‑454B)

• Electrical: DIYPro® cable included

• Control: Wireless Remote, SmartHVAC App, Voice (Alexa/Google)

• Operating Modes: Heat, Cool, Dry, Fan, Auto

• Special Feature: Follow Me® temperature tracking

• Warranty: 5‑year parts warranty

What’s Included

• MRCOOL DIY 12K BTU Wall‑Mounted Air Handler (230V)

• Wireless Remote Control with Follow Me®

• DIYPro® Communication/Power Cable

Required for Complete System (Sold Separately)

• MRCOOL DIY 12K BTU Outdoor Condenser (230V, 5th Gen)

• MRCOOL DIY QuickConnect® Pre‑Charged Line Set (25 ft or required length)

• Condenser pad or wall‑mount bracket

• Line hide cover kit (recommended)

• Electrical disconnect box (per local code)

Why Choose This Air Handler?

This 230V air handler is built for larger spaces that need reliable, efficient climate control. It combines smart‑home compatibility, energy‑saving operation, and the DIY‑friendly installation that MRCOOL is known for. Perfect for creating a comfortable zone in a living room, master suite, or open‑concept area—all without the cost of a professional installer.

Perfect For

• Living rooms and great rooms

• Master bedrooms and large suites

• Home offices in spacious settings

• Garage conversions and workshops

• Open‑plan apartments and condos

Ready to install your DIY mini‑split?
This MRCOOL 12K BTU Air Handler delivers powerful comfort with the simplicity of true DIY installation.

🛒 Add to Cart Today – Install It Yourself This Weekend!

Need the complete system? See our MRCOOL DIY Complete System Bundle for indoor + outdoor units and lineset.