MRCOOL 18,000 BTU 5th Gen Hyper Heat Mini Split w/ 25 ft line set

The MRCOOL DIY 5th Gen 18,000 BTU Hyper Heat Mini-Split delivers reliable, high-capacity heating and cooling for single rooms and open-concept spaces. Designed for straightforward, homeowner-friendly installation, it brings professional performance to residential and light commercial spaces up to 800 square feet.

This ductless system pairs variable-speed inverter technology with an energy-saving compressor to keep spaces comfortable in every season. Whether you manage a rental property, oversee a renovation, or want precise climate control in your home without extensive construction, this mini-split offers an efficient, powerful solution.

Key Features and Benefits of the MRCOOL DIY 5th Gen 18,000 BTU Hyper Heat Mini-Split

• True DIY Installation: The 25-foot pre-charged Quick Connect line set and DIYPRO cable let you mount, connect, and start the system without vacuum pumps or brazing, saving on labor and downtime.
• High Efficiency Operation: A 21.2 SEER2 and 12.5 EER2 help lower operating costs compared with older systems, making it easier to meet energy targets on new or retrofit projects.
• Smart Control Options: Manage temperature with the handheld remote, the SmartHVAC app, or voice commands through Amazon Alexa and Google Assistant for hands-free convenience.
• Corrosion-Resistant Construction: The Gold Fin condenser coating and sealed electrical cable defend against salt air, rain, and pests, extending service life in challenging environments.
• Eco-Friendly Refrigerant: Factory-charged R-454B offers a lower global warming potential than previous-generation refrigerants, supporting sustainability goals.
• Quiet Indoor Operation: The indoor air handler runs as low as 58 dB, keeping offices, bedrooms, and flex spaces free from disruptive noise.
• Built-In Safeguards: Auto-restart, programmable timer, and sleep mode maintain comfort settings after outages, reduce overnight energy use, and limit manual adjustments.

Extreme Climate Ready

Not every mini-split can thrive where temperatures swing from deep freezes to triple-digit heat. Operating from -22 degrees F to 122 degrees F, the MRCOOL DIY heat pump mini-split maintains dependable output during winter cold snaps and peak summer heat. The Hyper Heat design uses an advanced compressor and expanded coil surface to preserve capacity in low outdoor temperatures, so you can rely on stable indoor warmth without supplemental heaters. At the other end of the spectrum, the same inverter technology modulates cooling output to remove heat efficiently without frequent cycling, helping maintain precise set points even during prolonged heat waves.

Sylvane’s Expert Take

If you want professional-grade heating and cooling without hiring a professional installer, MRCOOL’s DIY Hyper Heat hits the mark. This model's pre-charged connections, broad operating range, and smart controls make it a top-tier choice for DIYers and handy homeowners. We especially appreciate the corrosion protection and lower-impact R-454B refrigerant, which allows it to stand up to harsh conditions while supporting long-term efficiency goals.