MRCOOL® 18K DIY 5th Gen Mini-split Air Handler 230v

MODEL: DIY-18-HP-WMAH-115D25-O

Powerful, Ultra-Quiet Comfort for Spaces up to 1,000 sq. ft.

The MRCOOL® 18k BTU DIY® 5th Generation Mini-Split Air Handler delivers high-capacity, whisper-quiet heating and cooling designed for hassle-free, do-it-yourself installation. Perfect for large bedrooms, open-concept living rooms, basements, and studios up to 1,000 sq. ft., this air handler pairs seamlessly with your MRCOOL® DIY® 5th Gen Single-Zone or Multi-Zone Condenser.

The pre-charged 25-foot Quick Connect® line set comes filled with eco-friendly R-454B refrigerant, eliminating the need for vacuum pumps or professional HVAC installation. Included DIYPro™ Communication Cable replaces bulky electrical conduit while standing up to the elements.

Effortlessly control your home’s climate through the SmartHVAC® app, Amazon Alexa, or Google Assistant voice commands. The built-in Follow Me® function ensures your room stays at your ideal temperature by sensing the remote’s location.

Protected with Gold Fin® anti-corrosion coating, this unit is made for long-lasting performance, even in coastal and humid climates. Enjoy year-round heating and cooling backed by one of the best warranties in the HVAC industry.

Why You’ll Love It

✅ Ideal for Mid-to-Large Spaces — Perfect for open-plan areas, large bedrooms, and living rooms up to 1,000 sq. ft.

✅ True DIY Installation — No HVAC license or vacuum pump needed with Quick Connect® line sets and DIYPro™ cable.

✅ Smart Home Compatible — Wi-Fi enabled, works with SmartHVAC® app, Alexa, and Google Assistant.

✅ Follow Me® Technology — Maintains precise comfort based on your remote’s location.

✅ Ultra-Quiet Operation — As low as 24 dBA for a peaceful, uninterrupted environment.

✅ Gold Fin® Condenser Protection — Rust-resistant coating built for coastal conditions.

✅ All-Season Heating & Cooling — Effective operation from 5°F to 86°F, for true year-round comfort.

✅ Industry-Leading Warranty — Lifetime Limited Compressor Warranty (with registration), 7-Year Compressor Warranty, and 5-Year Parts Warranty.

What You Need for a Complete System

For full heating and cooling performance, pair this indoor air handler with:

• MRCOOL® DIY® 5th Gen Single-Zone Condenser (115V Compatible)

• MRCOOL® Quick Connect® Pre-Charged Line Set (25ft included)

• DIYPro™ Communication Cable (25ft included)

Optional Accessories:

• MRCOOL® Wall Mount Bracket

• Additional Quick Connect® Line Sets (for extended runs)

• Coupler Kits (for line set extensions)

Important:
This air handler requires connection to a compatible MRCOOL® DIY® 5th Gen Condenser. It is not compatible with 3rd or 4th Gen systems.