MRCOOL DIY 5th Generation 9k BTU Heat Pump Mini Split - Complete System (454B Refrigerant)

MRCOOL DIY-09-HP-WM-115D25-O is a ductless heat pump mini-split system designed for efficient, year-round climate control in spaces up to400 sq. ft. The 5th Generation MRCOOL DIY line combines performance, durability, and easy installation for homeowners. A pre-charged25 ft. Quick Connect line set filled with R-454B refrigerant eliminates the need for specialized tools or professional installation. The includedDIYPRO cable replaces traditional electrical conduit, protecting wiring from weather, wildlife, and yardwork damage.

The system offers flexible control via a wireless remote, the SmartHVAC mobile app for iOS and Android, or hands-free voice commands usingAmazon Alexa and Google Assistant. After a power outage, auto-restart resumes previous settings automatically. A corrosion-resistantgold fin condenser boosts longevity, making it an excellent choice for coastal or humid environments. Comfort is enhanced byFollow Me technology, which adjusts temperature based on the remote’s location, and a Dry mode that reduces excess humidity.Backed by a 7-year compressor warranty and 5-year parts warranty, this mini-split offers lasting performance and peace of mind.

• 9,000 BTU heating & cooling capacity
• Max coverage: 400 sq. ft.
• 0.75 ton ductless single-zone system
• 25 ft. pre-charged Quick Connect line set with R-454B
• Gold fin condenser for corrosion resistance
• Control via remote, SmartHVAC app, Alexa, and Google Assistant
• Follow Me temperature sensing
• Dry mode for humidity control
• Auto-restart after power loss
• 5 operating modes: auto cool, automatic shutoff, defrost, fan only, sleep
• 5 fan speeds with reusable filter
• Overload protection for safety
• Voltage: 115V, Phase: 1
• Decibel rating: 54 dBA
• 7-year compressor warranty; 5-year parts warranty
• Not compatible with R410A systems

Efficient climate control for smaller spaces

With its 9K BTU capacity and 0.75-ton rating, this system delivers reliable heating and cooling for rooms up to 400 sq. ft. The R-454B refrigerantimproves environmental performance compared to older blends.

DIY-friendly installation

The pre-charged Quick Connect line set allows for tool-free installation without a vacuum pump. The DIYPRO cable replaces traditional conduit, simplifying setupwhile providing extra durability and protection.

Built for reliability and long service life

A gold fin condenser shields against corrosion in humid or coastal environments, while overload protection enhances system safety.Auto-restart ensures consistent comfort by restoring previous settings after outages.

Smart comfort features

Control the unit from anywhere with the SmartHVAC app, or use hands-free commands with Alexa and Google Assistant.Follow Me technology keeps the temperature comfortable where you are, and Dry mode reduces humidity for better air quality.