MRCOOL DIY 5th Gen Single-Zone Mini-Split: Efficient Comfort Without the Complications
Thinking about adding cooling or heating to a space—without the hassle of ductwork or hiring a contractor? The MRCOOL DIY 5th Gen Single-Zone Mini-Split makes that upgrade surprisingly simple. Whether it’s a garage, bonus room, home office, or sunroom, this ductless mini split system brings reliable year-round comfort in a package designed specifically for DIYers.
Built for Homeowners—No Special Tools Needed
This isn’t just another mini split system—it’s designed for homeowners with no prior HVAC experience, easy installation. Each unit ships with a pre-charged QuickConnect® line set, already filled with eco-friendly R-454B refrigerant. That means no vacuum pumps, no gauges, and no specialized training.
The included DIYPRO® cable eliminates the need for electrical conduit, offering added protection from weather, pests, and outdoor hazards. It’s a smart, streamlined way to future-proof your install without extra costs or tools.
Energy Efficiency That Pays Off
With a 23.6 SEER2 cooling rating and 11.5 HSPF2 heating efficiency, this system is engineered to keep your energy bills down while keeping your space comfortable. It’s a high-performance solution that meets modern standards for energy-conscious homeowners.
SEER2: 23.6
EER2: 14
HSPF2-4: 11.5
These numbers aren’t just impressive on paper—they translate to real savings over time, especially in spaces that need consistent temperature control.
Smart Control from Anywhere
Whether you’re home or away, you’ve got options for staying in control. The system supports both Google Assistant and Amazon Alexa, and it connects easily to the SmartHVAC app on any Android smart device or iOS.
Prefer the included remote? Its Follow Me® feature helps the system adjust airflow based on where you are—not just the wall-mounted thermostat—making sure comfort follows you around the room.
Comfort Features That Just Make Sense
Auto Mode: Maintains your set temperature without constant adjustments
Dry Mode: Helps dehumidify during muggy days
Auto Restart: Picks up right where it left off after a power outage
Anti-Mildew Function: Reduces condensation buildup in the air handler
Quiet Operation: Low indoor noise, even at full blast
This is a system that’s easy to live with—not just easy to install.
Sizing That Fits Your Space
The MRCOOL DIY 5th Gen Single-Zone Mini-Split is available in a range of capacities to match different room sizes. From compact studios to larger additions, you can choose the size that best suits your square footage and climate—without changing the core features or install method.
What’s in the Box
Indoor air handler
Outdoor condenser
Pre-charged 25-foot line set
DIYPRO® electrical cable
Wireless remote with Follow Me®
Smart controller module
Complete install hardware and instructions
It’s everything you need for a clean, effective install—no hidden extras or upsells required.
A Solid Investment in Comfort
Backed by a strong warranty, including a limited lifetime warranty (with 7 years on the compressor and 5 years on parts), this system is built to last. It’s a smart choice for anyone who wants reliable heating and cooling without relying on traditional ductwork or expensive contractor labor.
Ideal For:
Homeowners looking to skip the professional install
Rooms without existing HVAC or ductwork
Smart home users (Alexa + Google Assistant compatible)
Year-round use—cooling in summer, heating in winter
Coastal or outdoor-exposed locations (thanks to Gold Fin® corrosion protection)
Frequently Asked Questions
Q: Is the MRCOOL DIY 5th Gen considered a mini split system or a full HVAC system?
A: Technically, it’s a ductless mini split system, but it delivers the kind of year-round performance you'd expect from a more complex HVAC system. It cools and heats with high energy efficiency and requires no duct work.
Q: What makes the MRCOOL DIY series unique compared to traditional systems?
A: It’s one of the few mini split systems designed specifically for DIY installation. With no need for specialized training or expensive tools, homeowners can set it up using the included Quick Connect fittings and DIYPRO® cable.
Q: Is this system Energy Star certified?
A: Yes, the MRCOOL DIY system meets Energy Star standards for efficiency. With a 23.6 SEER2 rating, it's ideal for anyone looking to reduce energy use without sacrificing performance.
Q: Can I control the system with a smartphone?
A: Absolutely. The system connects via Wi-Fi and is compatible with the SmartHVAC smartphone app, as well as Google Assistant and Amazon Alexa for voice control. No extra equipment is needed—just an internet connection.
Q: Does it require any communication wires or electrical conduit?
A: No. Thanks to the included DIYPRO® cable, there’s no need for separate electrical conduit or additional communication wires. This offers higher mechanical protection and makes installation safer and faster.
Q: What happens if there’s a power outage?
A: The unit features Auto Restart, so it will automatically resume its previous settings once power is restored. No need to reset the system manually.
Q: How do I know which size is right for my space?
A: Sizing depends on your square footage. The MRCOOL system is available in multiple capacities, so whether you're cooling a small server room, a guest room, or a man cave, there's a version that will match your needs. Just be sure to choose based on your room size and insulation quality.
Q: Is this system suitable for multi-zone applications?
A: This model is a single zone mini split, ideal for heating and cooling one space. If you’re looking to condition multiple rooms, consider a multi zone system instead.
Q: Do I need professional help to install it?
A: Not necessarily. The MRCOOL DIY 5th Gen is a cooling solution designed to be installed without professional help, making it perfect for homeowners who want to avoid costly labor. Everything—from the air handler to the line sets—is designed with DIY use in mind.
