MRCOOL DIY 12,000 BTU 23.5 SEER2 5th Gen Hyper Heat Single Zone Mini Split System - 230V

The MRCOOL DIY 12,000 BTU 23.5 SEER2 5th Gen Hyper Heat Single Zone Mini Split System is a single-zone system that heats and cools one room up to 550 square feet, and it keeps heating in outdoor temperatures as low as -22°F.

This wall mount unit offers easy do-it-yourself installation with no special tools or professional services needed. Your order ships with a pre-charged 25-foot Quick Connect line set, pre-charged with R-454B refrigerant, and a DIY PRO cable that protects the outdoor wiring from weather.

Hyper Heat is the cold-climate version of the MRCOOL DIY line. Where a standard heat pump fades in freezing weather, this one keeps putting out heat.

Ideal for

• Bedrooms and home offices
• Four-season rooms
• Insulated garages
• Cabins

Best for: homeowners in cold climates who need real winter heat from one wall unit

Features

• Heats at -22°F. Hyper Heat inverter technology keeps producing heat in subzero weather that shuts down standard heat pumps.
• 23.5 SEER2 efficiency. ENERGY STAR certified inverter operation that ramps up and down instead of cycling on and off, which is what keeps power bills down.
• Control from anywhere. Included remote, SmartHVAC app on your phone, or just ask Alexa or Google Assistant.
• Follow Me comfort. The remote senses the temperature where you're sitting, not at the wall, so the room feels the way you set it.
• Washable filter plus Dry, Quiet, Sleep, and Fan Only modes for year-round comfort with no recurring filter cost.

Key Specs

• 12,000 BTU (1 ton) heating and cooling
• 23.5 SEER2, 12.8 EER2, 10 HSPF2
• Covers one room up to 550 sq ft
• 208/230V
• 25 ft pre-charged R-454B DIY® Quick Connect line set, extendable to 75 ft
• Wi-Fi, iOS and Android app, Alexa and Google Assistant
• ENERGY STAR, AHRI certified, UL listed

What you should know

This is a complete single-zone system, so nothing else is required to run it except a dedicated 208/230V circuit. It keeps full heating output far below freezing and still produces heat down to -22°F outside.

Warranty

• 7-year compressor coverage
• 5-year parts coverage

Specifications:

Need help?

Call us at 1-800-514-2418 and our HVAC product specialists will help answer your questions and customize your MRCOOL DIY 12K Hyper Heat Mini Split System setup.

Order online in minutes. Secure checkout, free shipping, and no sales tax.

Good AirX is an Authorized MRCOOL Dealer. Every unit ships new, factory-sealed, and fully covered by MRCOOL's manufacturer warranty.

Frequently Asked Questions

Here are some of the most asked questions about MRCOOL DIY 12K Hyper Heat Mini Split System setup.

What room size is this 12,000 BTU unit for?

This unit is designed to cool and heat a room or open space measuring up to 550 square feet. Ideal for bedrooms, home offices, four-season rooms or insulated garages.

Is this a complete system or only the indoor unit?

Yes, the MRCOOL DIY 12,000 BTU 23.5 SEER2 5th Gen Hyper Heat Single Zone Mini Split System - 230V is a complete system that includes both the indoor air handler and the outdoor condenser unit.

Can I really install this myself? What tools do I need?

Yes, you can install the MRCOOL DIY 12K Hyper Heat Mini-Split System yourself without specialized HVAC tools or a professional technician, thanks to its pre-charged Quick Connect line sets. Most homeowners can have this unit successfully installed in a day or two, with many often taking just a few hours.

How long is the included line set? Can I get a longer one?

This system includes a 25-foot pre-charged line set. You can also order a longer line set. MRCOOL offers pre-charged line set lengths from 16 to 75 feet for their DIY mini-split systems.

Does it heat as well as it cools?

Yes. It is built for winter. It keeps producing heat down to -22°F outside, where standard heat pumps give up, and it cools in summer just like any mini split.

What warranty do I get if I install it myself?

MRCOOL offers a 5-year parts warranty and a 7-year compressor warranty. The 5-year parts coverage includes the electrical components, circuit boards, fan motors and coils. Installing it yourself does not void the warranty as long as you follow the installation instructions.

What is included in the box?

MRCOOL DIY 12,000 BTU 23.5 SEER2 5th Gen Hyper Heat Single Zone Mini Split System - 230V includes:

• 12,000 BTU Wall-Mounted Air Handler (Indoor Unit)
• Outdoor Condenser with Gold Fin corrosion resistance (Outdoor Unit)
• 25-ft. Pre-Charged Quick-Connect Line Set (pre-filled with R-454B refrigerant)
• DIY PRO Cable (replaces traditional electrical conduit for weather and yardwork protection)
• Wireless Remote Control (with batteries)
• MRCOOL Smart HVAC Wi-Fi Module (for app control and smart home integration via Alexa/Google Assistant)
• Installation Accessories (including wall mounting plate, cardboard mounting/marking template, wall penetration insulation/foam, and mounting screws)
• Manuals and Documentation

What is your return policy?

We offer a 30 day returns for completely unused, uninstalled and in their original factory packaging in resalable condition units with restocking fees. Pre-charged line sets are non-returnable. Learn more about our Refund Policy.

Do you offer free shipping and where do you deliver to?

We offer free shipping and no sales tax on all of our MRCOOL products in the contiguous United States. We do not ship to Alaska, Hawaii, Canada, Puerto Rico or the Caribbean.

How is my unit shipped and delivered?

Your MRCOOL unit will be shipped from the manufacturer via LTL (Less-Than-Truckload) freight carrier on a pallet. We offer standard curbside delivery with a semi-truck with a liftgate delivery on the pallet to your shipping address. The driver will not move the boxes inside your home or garage. Please inspect your order for any damage before accepting and signing for the delivery.