Designed with homeowners in mind, the MRCOOL® DIY® 5th Generation 36,000 BTU Ductless Mini-Split makes professional-grade HVAC accessible—no specialized tools or prior experience required. Perfect for large spaces up to 1,550 sq. ft., this high-capacity system delivers energy-efficient cooling and heating with easy DIY installation.

Equipped with a 25-foot pre-charged QuickConnect® line set, setup is simple and vacuum-free. The R-454B refrigerant offers a reduced environmental footprint compared to older refrigerants, while the included DIYPRO® cable replaces electrical conduit for added protection from the elements and pests.

Control the system from anywhere with the SmartHVAC app on iOS or Android, the included wireless remote, or via voice commands through Amazon Alexa or Google Assistant. With Follow Me® functionality, the remote senses temperature at your location to optimize comfort.

The system’s Gold Fin® condenser coating provides corrosion resistance in coastal environments. Additional features like Dry Mode, Quiet Mode, Auto Cool, and Auto Restart deliver efficient and convenient operation every day.

This unit is backed by a best-in-class warranty that includes limited lifetime coverage, a 7-year compressor warranty, and a 5-year parts warranty. Designed for maximum comfort, energy savings, and ease of use, the MRCOOL® DIY® 36k Mini-Split offers performance you can trust in large residential or commercial spaces.

Key Features

• True DIY Installation – No HVAC experience or tools required. QuickConnect® line set is pre-charged and vacuum-free.

• High Capacity Comfort – Delivers 36,000 BTU of powerful cooling and heating for spaces up to 1,500 sq. ft.

• Smart Control Integration – Adjust settings via remote, SmartHVAC app, or voice commands using Alexa or Google Assistant.

• Gold Fin® Corrosion Protection – Extends condenser life in salty, humid, or coastal environments.

• Durable DIYPRO® Cable – Replaces traditional conduit and protects wiring from weather and animals.

• Follow Me® Function – Remote monitors temperature at your location for more accurate room comfort.

• Dry Mode – Reduces humidity and improves air quality in larger spaces.

• Quiet Operation – Indoor unit operates as low as 27.5 dB(A), making it ideal for shared or sound-sensitive rooms.

• Auto Restart – Automatically resumes operation with saved settings after power interruptions.

• Backed by Industry-Leading Warranty – Includes a limited lifetime warranty, 7-year compressor warranty, and 5-year parts warranty.

Specifications

• Brand: MRCOOL®

• Series: DIY 5th Generation

• Product Type: Single-Zone Ductless Mini-Split Heat Pump

• Voltage: 208–230V, 1 Phase, 60 Hz
  

• SEER2 Rating: 18
  

• EER2 Rating: 8.5
  

• HSPF2-4 Rating: 8.5
  

• HSPF2-5 Rating: 6.5
  

• Cooling Capacity: 36,000 BTU
  

• Heating Capacity: 36,000 BTU
  

• Coverage Area: Up to 1,550 sq. ft.
  

• Compressor Type: Rotary
  

• Fan Speeds: Variable
  

• Refrigerant Type: R-454B (pre-charged)
  

• Refrigerant Volume: 109.70 oz
  

• Line Set Length: 25 ft.
  

• Max Line Set Length: 213.2 ft.
  

• Liquid Line Size: 3/8"
  

• Suction Line Size: 5/8"

• Air Handler Dimensions (WxDxH): 49.57” x 11.10” x 14.25”
  

• Air Handler Weight: 48.73 lbs
  

• Air Handler Noise Level (Hi/Mi/Lo/Si): 55.5 / 49.5 / 43.5 / 38.0 / 27.5 dB(A)

• Condenser Dimensions (WxDxH): 37.24” x 16.14” x 31.89”
  

• Condenser Weight: 152.12 lbs
  

• Condenser Noise Level: 60.5 dB(A)

• Control Options: Remote, SmartHVAC App, Amazon Alexa, Google Assistant
  

• Low Ambient Cooling: Down to 5°F
  

• Certifications: UL Listed, ETL Listed, AHRI Certified

• Warranty:
  

  • Parts: 5 Years
    

  • Compressor: 7 Years
    

  • Extended Limited Lifetime Replacement: Available with MRCOOL® Care Program registration
    

• Environmentally Friendly: Yes – R-454B low-GWP refrigerant
  

• Auto Restart: Yes
  

• Dry Mode: Yes
  

• Timer Function: Yes
  

• Indoor Display: Yes
  

• Indoor Unit Finish: Glossy white
  

• Warranty Registration Required: Yes

BTU Size Chart

Which BTU rating should I choose?

• The appropriate BTU rating depends on the size of the space you need to heat or cool.
• A higher BTU indicates greater heating and cooling capacity, allowing the air handler to effectively condition larger areas.

*Ceiling height, insulation quality, and local climate can all affect the actual coverage area. For instance, an uninsulated space will need more BTUs to maintain comfort compared to a well-insulated room.

Shipping & Returns

Shipping Policy

• Free Shipping on All Orders – We provide free standard delivery on all orders within the contiguous U.S.

• Ground Shipping for Smaller Items – Accessories and lighter products ship via standard ground carriers such as FedEx, UPS, or similar.

• Freight Delivery – Large items (HVAC/Heaters) ship via LTL freight. Drivers deliver to the curbside only; they cannot bring items into your home or garage.

• Tracking Information – Tracking is typically provided within 3–5 business days after your order is placed.

• Carrier Updates – Once tracking is issued, allow 1–2 business days for the carrier to populate shipment details.

• More Information – Full details can be found on our Shipping Policy page.

Return Policy

• 30-Day Return Window – Return requests must be submitted within 30 days of delivery; requests after this period cannot be accepted.

• Inspect Upon Delivery – Visible damage must be noted on the driver's paperwork. Report all damage within 24 hours to qualify for a replacement.

• Return Condition Requirements – Items must be unused, uninstalled, and in original packaging, including all boxes, crates, or pallets.

• Restocking Fees – Restocking fees of 25–35% apply to most brands; see full policy for details.

• Non-Returnable Items – Accessories, small components (remotes, line sets), and custom-finish items are non-returnable.

• Full Details – See our Return & Refund Policy page for complete guidelines.