MRCOOL® E Star DIY 4th Gen 18k BTU Ductless Mini-Split Air Handler 230V/60Hz
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MODEL: DIY-18-HP-WMAH-230C25
Powerful Whole-Room Comfort for Up to 750 sq. ft.
The MRCOOL® DIY 4th Gen 18K BTU Wall Mounted Air Handler delivers powerful, efficient heating and cooling for larger rooms—covering up to 750 sq. ft. Engineered for easy installation and seamless smart control, this ENERGY STAR® certified unit boasts up to 22 SEER performance and is fully compatible with MRCOOL®'s Pre-Charged Quick Connect® Line Sets—no vacuuming, no licensed pro needed.
From bedrooms and living rooms to studios and home offices, this air handler includes advanced features like COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP modes. The included remote and SmartHVAC® app (iOS & Android) give you complete control—anytime, anywhere. Plus, it's voice-compatible with Alexa and Google Assistant.
Designed to install quickly with a wall bracket and operate quietly (as low as 31 dBA), the 18K model blends performance, comfort, and peace of mind—backed by MRCOOL®'s Limited Lifetime Compressor Warranty (with registration).
Why You’ll Love It
✅ Cools & Heats Up to 750 sq. ft. — Ideal for large bedrooms, offices, and open-concept spaces
✅ DIY Installation — Pairs with Pre-Charged Quick Connect® Line Sets; no special tools or HVAC tech needed
✅ Smart HVAC Control — Operate via SmartHVAC® app, Amazon Alexa, or Google Assistant
✅ Ultra-Quiet Performance — Operates at a whisper-quiet 31–44.5 dBA
✅ ENERGY STAR® Certified — Enjoy maximum efficiency with up to 22 SEER
✅ Built-In Safety — Includes MRCOOL® DIY Pro™ Cable for added protection against outdoor elements
✅ Best-in-Class Warranty — Lifetime Compressor (with registration), 7-Year Compressor, 5-Year Parts
Specifications
Specifications at a Glance
| Attribute | Details |
|---|---|
| Cooling/Heating Capacity (BTU) | 18,000 |
| Voltage | 208–230V |
| Phase | 1 |
| Cycle | 60 Hz |
| Max Coverage Area | Up to 750 sq. ft. |
| SEER | Up to 22 |
| Mount Type | Wall |
| Refrigerant Type | R-410A |
| Decibel Rating (dBA) | 31 (Low) – 44.5 (High) |
| Blower Motor RPM | 1120 / 950 / 700 |
| Liquid Line Size | 1/4” |
| Suction Line Size | 1/2” |
| Max Lineset Length | 98.42 ft |
| Wi-Fi Enabled | Yes |
| App Compatibility | iOS & Android |
| Remote Control Included | Yes |
| ENERGY STAR® Certified | Yes |
| Warranty | Lifetime Compressor (with registration), 7-Year Compressor, 5-Year Parts |
| Net Dimensions (WxHxD) | 42.52” x 13.19” x 8.90” |
| Net Weight | 34.61 lbs |
What’s Included:
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MRCOOL® 18K BTU 4th Gen Wall Mounted Air Handler (208-230V)
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Remote Control
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Mounting Plate
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MRCOOL® Warranty Documents
What You Need for a Complete System
This unit requires pairing with:
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Compatible MRCOOL® DIY® 4th Gen Multi-Zone Condenser
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Pre-Charged Quick Connect® Line Sets (sold separately)
Installation
Installation & Manuals
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