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What Size MRCOOL Mini Split Do I Need?
MRCOOL Mini Split Line Set Length Limits
Custom Comfort for Two Zones — MRCOOL DIY 5th Gen 27,000 BTU 2-Zone System
Achieve perfect temperatures in two separate areas with the MRCOOL DIY 5th Gen 27k BTU 2-Zone Ductless Mini Split. This complete system pairs a 27k multi-zone condenser with two wall-mounted air handlers (9k + 18k), delivering year-round heating and cooling for up to 1,125 square feet—no ductwork required.
Coverage by Zone:
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18,000 BTU: Covers spaces up to 750 sq. ft. (living room, master suite)
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9,000 BTU: Covers spaces up to 375 sq. ft. (bedroom, office, den)
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Total Coverage: 1,125 sq. ft.
True DIY Installation
Skip the expensive HVAC contractor. Patented Quick Connect® line sets come pre-charged with eco-friendly R-454B refrigerant, so installation is simple, tool-free, and DIY-friendly.
Smart Control, Anywhere
Manage comfort from anywhere using the SmartHVAC app for iOS and Android. Adjust temperatures, set schedules, or use voice commands with Amazon Alexa and Google Assistant.
Built to Last
The outdoor condenser features Gold Fin® anti-corrosion coating, ensuring durability in coastal or humid climates.
Key Features:
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23 SEER2 / 9.5 HSPF2 efficiency
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Individual zone control
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Dry Mode for humidity reduction
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Follow Me® remote function
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7-year compressor / 5-year parts warranty
Upgrade to zoned comfort—without the ductwork. The MRCOOL DIY 27k 2-Zone system puts you in control.