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4th Gen DIY Series

MRCOOL DIY 4th Gen 12K BTU Mini-Split Heat Pump System – Rare R-410A Model, 22 SEER, DIY Installation

MRCOOL DIY 4th Gen 12K BTU Mini-Split Heat Pump System – Rare R-410A Model, 22 SEER, DIY Installation

Regular price $1,895.00 USD
Regular price $2,499.00 USD Sale price $1,895.00 USD
Save $604.00 Sold out
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🔥 Rare 4th Gen R-410A Model
DIY-Friendly Design – Install it yourself
Extremely Limited Stock

SKUDIY-12-HP-WM-115C25

Type12k - Single Zone

✅ This item is in stock!

Only a few left — 1 available

Estimated Delivery: September 14 – September 16

Based on order date & typical delivery times.
• Orders Typically ship within 2 business days

  • Official MRCOOL store logo – used to represent brand-authorized sellers and verified HVAC product listings.Authorized MRCOOL Dealer
  • Customer service award graphic – MRCOOL’s 5-star HVAC support rating for Easy Pro, DIY, and multi-zone systems.5-Star Customer Service
  • Fast shipping badge for MRCOOL mini splits – official delivery services offering nationwide coverage and tracking.Fast & Secure Shipping
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Have questions or need help selecting the perfect Mini Split system?

Talk with our expert HVAC team members now for assistance!!

PRODUCT DESCRIPTION

Compact. Efficient. Hard to Find.

The MRCOOL DIY 4th Generation 12K BTU, 1 Ton, 22 SEER Ductless Mini-Split Heat Pump System (DIY-12-HP-WM-115C25) is the most popular size for bedrooms, offices, and small living spaces. This R-410A 4th Gen unit is no longer manufactured but remains one of the most sought-after systems due to its proven reliability, DIY installation, and high efficiency.

Designed to heat and cool up to 500 sq. ft., this system is ideal for single rooms, apartments, garages, or additions where comfort and efficiency matter most. With its pre-charged quick-connect line set, you can install it yourself—no HVAC tech required.


🌟 Key Features & Benefits

✔ Rare R-410A DIY System – Small but Powerful

  • Compact size makes it the most versatile 4th Gen model.

  • Discontinued nationwide, but in high demand for small spaces.

✔ High Efficiency, Energy Savings

  • 22 SEER rating exceeds Energy Star standards.

  • Inverter-driven technology reduces utility bills without sacrificing comfort.

✔ Complete DIY Package – What’s Included

  • 12K BTU Outdoor Condenser Unit

  • 12K BTU Indoor Wall-Mounted Air Handler

  • 25 ft. Pre-Charged Line Set with R-410A Refrigerant

  • Smart Remote Control with Follow Me Function

  • Communication Cable, Wall Bracket, and Install Kit

✔ Simple DIY Installation

  • Pre-charged quick-connect line set → no special tools or license required.

  • Step-by-step guides and videos included.

✔ Comfort Modes for Every Season

  • Cooling, Heating, Dehumidification, Auto, and Sleep Modes.

  • Whisper-quiet operation perfect for bedrooms or offices.

✔ Smart Home Ready

  • WiFi app control from your phone.

  • Works with Alexa & Google Assistant.

  • “Follow Me” feature adjusts temperature based on remote location.

✔ Warranty You Can Trust

  • Limited Lifetime Compressor Warranty.

  • 5-Year Parts and 7-Year Compressor Protection.


📦 Why Choose the 12K 4th Gen MRCOOL?

  • Rare availability – one of the last R-410A DIY 12K systems.

  • Perfect for small spaces up to 500 sq. ft.

  • 22 SEER efficiency saves money on energy bills.

  • Smart-ready with WiFi + voice assistant compatibility.

  • DIY install saves hundreds on labor.

  • Backed by warranty for long-term reliability.


🛒 Limited Stock – Order Now

This is one of the last chances to buy a brand new MRCOOL DIY 4th Gen 12K BTU system. Discontinued but still in demand, these units will not be restocked once sold out.

👉 Order today from MRCOOL DIY Direct – America’s most trusted MRCOOL dealer.

WHAT'S INCLUDED

  • Pre-Charged Line Set

  • Remote Control

  • Communication Wire

  • Wall Sleeve

  • Condenser

  • Air Handler

OPTIONS & ACCESSORIES

MRCOOL Disconnect Switch and Electrical Whip Kits for Ductless Split System Condensers 9k BTU To 60k BTU
MRCOOL Disconnect Switch and Electrical Whip Kits for Ductless Split System Condensers 9k BTU To 60k BTU
$98.87
MRCOOL Condenser Wall Mounting Kit for 9k to 36k BTU Ductless Split Systems
MRCOOL Condenser Wall Mounting Kit for 9k to 36k BTU Ductless Split Systems
$79.95
MRCOOL LineGuard 4.5-Inch 16-Piece Complete Line Set Cover Kit for Ductless Mini-Split or Central System (MLG450)
MRCOOL LineGuard 4.5-Inch 16-Piece Complete Line Set Cover Kit for Ductless Mini-Split or Central System (MLG450)
$133.43
Rectorseal RSH-50 Surge Protective Device 50kA 96415
Rectorseal RSH-50 Surge Protective Device 50kA 96415
$92.95
Elite Condenser Pad - 18 In. x 38 In. x 3 In. For Outside Ground Placement of the MRCOOL DIY Condenser
Elite Condenser Pad - 18 In. x 38 In. x 3 In. For Outside Ground Placement of the MRCOOL DIY Condenser
$79.67

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