What Size MRCOOL Mini Split Do I Need?
MRCOOL DIY 24K BTU Wall-Mounted Air Handler | Indoor Unit for Large Rooms up to 1050 Sq. Ft.
Complete your large-scale DIY mini-split system with the 5th Generation MRCOOL® DIY® 24K BTU Air Handler. This powerful, wall-mounted indoor unit delivers robust, whole-room heating and cooling for large living areas, basements, and open-concept spaces up to 1050 sq. ft. Designed specifically for seamless integration with a compatible 24K BTU outdoor condenser, this air handler features the DIY-friendly technology that makes professional-grade comfort achievable without professional installation.
Why This High-Capacity Air Handler Is Perfect for Your Space
✅ Powerful Performance for Large Areas: With 24,000 BTU (2-Ton) capacity, this indoor unit efficiently manages climate control in spaces where standard units fall short—ideal for great rooms, master suites, converted garages, and open floor plans.
✅ Designed for DIY QuickConnect® Systems: This air handler is engineered specifically for use with MRCOOL's QuickConnect® pre-charged line sets. When paired with a compatible outdoor condenser, installation becomes truly tool-simple with no vacuum pump or refrigerant expertise required.
✅ Integrated Electrical Ready: Features built-in connections for the MRCOOL DIYPRO® cable (sold separately with condenser bundles), which combines power and control wiring into one durable line, eliminating the need for separate electrical conduit.
✅ Multiple Smart Control Options: Operate your comfort system your way. Use the included wireless remote, control settings from anywhere with the SmartHVAC app (iOS/Android), or use convenient voice commands with Amazon Alexa and Google Assistant.
Advanced Comfort Features
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Follow Me Technology: The wireless remote acts as a smart comfort sensor. When enabled, the air handler detects the remote's location and directs airflow to maintain personalized temperature exactly where you are in the room.
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Dry Mode for Humidity Control: More than just heating and cooling—this specialized function operates as a quiet dehumidifier to remove excess moisture from the air, enhancing comfort on humid days and helping prevent mold and mildew.
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Multi-Directional Airflow: Engineered with adjustable louvers to distribute high-volume airflow quietly and evenly throughout your large space, preventing hot or cold spots.
Compatibility & Warranty
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Pairs with 24K BTU Condensers: Designed to work seamlessly with MRCOOL DIY 24K BTU Outdoor Condensers (5th Generation recommended), particularly those featuring Gold Fin® anti-corrosion technology for durability in coastal or harsh environments.
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Protected by MRCOOL Warranty: This indoor unit is covered by a 5-year parts warranty and is part of a system backed by MRCOOL's comprehensive protection, including a 7-year compressor warranty and limited lifetime warranty on the outdoor coil when used with compatible components.
Technical Specifications
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Product: Indoor Air Handler (Wall-Mounted) | 5th Generation
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Capacity: 24,000 BTU (2-Ton) - Requires matching 24K BTU outdoor condenser
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Recommended Coverage: Large areas up to 1050 sq. ft.
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Connection System: QuickConnect® compatible
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Electrical: DIYPRO® Cable ready
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Control: Wireless Remote, SmartHVAC App, Voice Control (Alexa/Google Assistant)
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Key Modes: Cooling, Heating, Fan, Dry (Dehumidify), Auto
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Special Feature: Remote "Follow Me" Temperature Sensing
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Warranty: 5-Year Parts Warranty
What's Included & What You Need
This Listing Includes:
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MRCOOL DIY 24K BTU Wall-Mounted Air Handler
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Wireless Remote Control
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Installation Template & Hardware
Required for Complete System (Sold Separately):
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MRCOOL DIY 24K BTU Outdoor Condenser (5th Gen recommended)
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MRCOOL DIY QuickConnect® Pre-Charged Line Set (25ft or required length)
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MRCOOL DIYPRO® Electrical Cable
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Condenser Pad or Wall Bracket
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Line Set Cover Kit (Recommended)
Perfect For:
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DIYers installing a system for large living rooms, basements, or workshops
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Upgrading an existing system with a new, high-capacity indoor unit
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Completing a custom installation with specific component preferences
Ready to install your high-capacity indoor comfort? The MRCOOL DIY 24K BTU Air Handler delivers powerful performance, intelligent features, and the simplicity that defines the DIY experience. Add to cart and pair it with a compatible outdoor condenser and line set to complete your system.
🔗 Need the Complete Bundle? For the easiest solution, shop our MRCOOL DIY 24K BTU Complete System which includes this air handler, the matching outdoor condenser, pre-charged line set, and all necessary cables in one ready-to-install kit.


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