MRCOOL DIY® 12K BTU 5th Gen Single-Zone Mini Split System
The MRCOOL DIY® 5th Generation 12,000 BTU Single-Zone Mini Split System delivers dependable, energy-efficient heating and cooling performance for spaces up to approximately 550 square feet. Built for homeowners seeking professional-grade performance with straightforward self-installation, this system delivers reliable comfort throughout the year with genuine DIY convenience.
Built on MRCOOL’s proven DIY platform, the system uses MRCOOL® DIY® Quick Connect Pre-Charged Line Sets, eliminating the need for vacuum pumps, refrigerant charging, or specialized HVAC equipment. Every key component ships factory-sealed and pre-charged, so installation is achievable for anyone with basic tool experience.
Sophisticated inverter technology maintains steady indoor temperatures while minimizing energy usage. This system is ENERGY STAR® certified and uses R-454B refrigerant, an eco-conscious alternative to R-410A that satisfies current efficiency and environmental requirements without compromising performance.
Climate management is versatile and user-friendly. The system supports wireless remote operation, app-based control through the MRCOOL Smart HVAC app, and voice control via Amazon Alexa and Google Assistant. Features such as Follow Me temperature sensing and Dry Mode dehumidification allow precise comfort adjustments throughout the year.
Designed for durability, the outdoor condenser features Gold Fin® corrosion-resistant coating, ideal for coastal or high-humidity climates. Low-noise operation makes this unit well-suited for bedrooms, offices, and other noise-sensitive spaces. Upon registration, the system is protected by the manufacturer's warranty for your confidence and protection.
This system is an excellent solution for bedrooms, home offices, additions, and small living spaces where efficient climate control, intelligent features, and self-installation are essential.
Line Set Options (Important to Know)
Every MRCOOL DIY 5th Gen system includes a 25’ pre-charged line set and control wire. If your installation requires a different length, we custom-bundle your order so you receive the correct pre-charged line set and matching control wire, ready to install.
Longer or alternate line set selections may add 1–2 business days to order preparation so we can configure everything correctly.
We do not recommend splicing control wires. Continuous, factory-length cable ensures reliable communication and long-term system performance.
Shipping Policy
Free Standard Shipping
We offer free standard shipping on all orders. Orders are processed within 1–2 business days and typically arrive within 5–7 business days.
Expedited Shipping
Expedited shipping options are available at checkout. Expedited orders placed before 12pm EST ship the same business day.
Order Tracking
Once your order ships you will receive a confirmation email with a tracking number. You can track your shipment at any time through our website or the carrier's portal.
International Shipping
We currently ship within the United States only. International shipping is not available at this time.
Return Policy
30-Day Returns
We accept returns within 30 days of delivery. Items must be unused, in their original packaging, and in the same condition as received.
How to Initiate a Return
Contact our support team at sales@homecrucial.com with your order number and reason for return. We will provide a prepaid return label within 1–2 business days.
Refunds
Refunds are processed within 5–7 business days after we receive the returned item. The refund will be issued to your original payment method.
Non-Returnable Items
Items that have been installed, used, or damaged after delivery are not eligible for return.
Warranty
Manufacturer's Warranty
All products sold at Home Crucial are covered by the manufacturer's warranty. Warranty terms vary by brand and product — please refer to the documentation included with your product for specific details.
What Is Covered
Manufacturer warranties typically cover defects in materials and workmanship under normal use and conditions. Coverage does not include damage caused by misuse, improper installation, or normal wear and tear.
Warranty Claims
To initiate a warranty claim, contact us at sales@homecrucial.com with your order number, a description of the issue, and photos if applicable. We will coordinate with the manufacturer on your behalf.
Extended Protection
Extended warranty and protection plans may be available for select products. Contact us for more details.
Customer Reviews
★★★★★ 4.9 out of 5 · 20 reviews
High-efficiency 5th Gen ENERGY STAR® rated DIY mini split heat pumps.
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Outdoor esthetics do matter.
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Create your bundle with ease.
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Authorized Dealer of Mr Cool™.
