SKU: 12730937331

MRCOOL DIY® 5th Gen E Star 12,000 BTU Single Zone Mini Split Air Handler 115V, DIY-12-HP-WMAH-115D25-O

$353.70 $393.00
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Description

MRCOOL DIY® 5th Gen E Star 12,000 BTU Single Zone Mini Split Air Handler 115V, DIY-12-HP-WMAH-115D25-OMRCOOL DIY 5th Gen 12,000 BTU Single Zone Mini Split Air Handler 115V (DIY 12 HP WMAH 115D25 O) The MRCOOL DIY 5th Gen 12K BTU Single Zone Mini Split Air Handler is designed for year round heating and cooling, providing energy efficient climate control for spaces 350 to 500 sq. ft.. This air handler pairs with the MRCOOL DIY 5th Gen Condenser, delivering seamless operation, customizable comfort, and wireless control. With a simple DIY installation,

MRCOOL DIY® 5th Gen 12,000 BTU Single Zone Mini Split Air Handler – 115V (DIY-12-HP-WMAH-115D25-O)

The MRCOOL DIY® 5th Gen 12K BTU Single Zone Mini Split Air Handler is designed for year-round heating and cooling, providing energy-efficient climate control for spaces 350 to 500 sq. ft.. This air handler pairs with the MRCOOL DIY® 5th Gen Condenser, delivering seamless operation, customizable comfort, and wireless control.

With a simple DIY installation, this indoor unit is easy to set up with the pre-charged QuickConnect® line set (sold separately). Enjoy hands-free temperature control via the SmartHVAC app, Amazon Alexa, or Google Assistant, or use the included remote.

📌 This listing includes only the indoor air handler. A compatible MRCOOL DIY® 5th Gen Condenser is required for full system operation.

Key Features & Benefits:

✅ DIY Installation – No HVAC Technician Required

  • Works with pre-charged DIY® QuickConnect® line set (sold separately) for a vacuum-free installation.
  • No special tools or professional experience needed—perfect for DIYers.

✅ Powerful Heating & Cooling

  • 12,000 BTU capacity, ideal for 350-500 sq. ft. rooms.
  • Operates on 115V power supply.

✅ Smart Climate Control for Maximum Comfort

  • Adjust settings via SmartHVAC app (iOS & Android), remote, or voice commands with Amazon Alexa & Google Assistant.
  • Follow Me Function optimizes comfort by adjusting airflow based on the remote’s location.

✅ Dehumidification Mode for Improved Air Quality

  • Dry Mode reduces excess humidity, enhancing indoor air quality.

✅ DIYPRO® Cable – Enhanced Durability

  • Eliminates the need for electrical conduit, providing extra protection against outdoor elements and wildlife.

✅ Industry-Leading Warranty

  • Limited Lifetime Warranty on select components.
  • 7-Year Compressor Warranty and 5-Year Parts Warranty.

✅ Certified for Quality & Safety

  • Intertek listed (5031495) for compliance with performance, safety, and energy efficiency standards.

Specifications:

  • Brand: MRCOOL DIY®
  • Model: DIY-12-HP-WMAH-115D25-O
  • Capacity: 12,000 BTU
  • Coverage Area: 350-500 sq. ft.
  • Power Supply: 115V
  • Compatible Line Set: DIY® QuickConnect® (sold separately)
  • Control Options: Remote, SmartHVAC App, Alexa, Google Assistant
  • Functions: Heating, Cooling, Dehumidification (Dry Mode), Follow Me Function
  • Certifications: Intertek Listed 5031495
  • Compressor Warranty: 7 Years
  • Parts Warranty: 5 Years

Important Notes:

📌 This listing includes only the indoor air handler. A compatible MRCOOL DIY® 5th Gen Condenser is required for full system operation.

📌 Stock images may be used—actual product appearance may vary slightly.

📌 Professional Installation Not Required – Designed for DIY installation, but must be paired with a compatible MRCOOL outdoor condenser for full operation.

Need Help? Contact Us!

If you have any questions about the MRCOOL DIY® 5th Gen 12K BTU Mini Split Air Handler, please call us to speak with a customer service representative. They will be happy to assist you!

As always, purchase your MRCOOL parts and equipment from MRCOOL DIY Direct, the USA’s most trusted MRCOOL dealer.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 12730937331

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4.3 ★★★★★
Based on 30 reviews
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Mack Mackenzie
Pawtucket, US
★★★★★ 4
These are very thick pillows.
Item Package Quantity: 2, Size: Queen
Exactly as advertised. They are very firm and very thick. They're too thick for me to be able to use as bed pillows. However, they seem to work pretty well as cushions in my papasan chair on top of its normal cushion also work very well as decorative pillows. I'm still giving them four stars because they're exactly as advertised and they seem well made. My only complaint is that they're just too thick. And that's definitely not the fault of the pillows or the pillow maker.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
J
JLN
Omaha, US
★★★★★ 5
Lightweight, very smooth and comfortable comforter sheet set an a very attractive price
Color: Ivory, Size: Queen, Color: Ivory, Size: Queen
Such a well priced, attractive bed in a bag (comforter and sheet set) with the most lightweight comforter I have ever come across that is not a down comforter. This one is filled with 100% polyester with a 100% microfiber exterior. The sheets are called microfiber, which I am sometimes not a fan of as sometimes they feel too stretchy and hot. However, these feel good, and almost more like a smooth percale. It’s nice to the touch. Color is attractive in a clean ivory color. Going back to the comforter, I love the lightness of natural down, but somehow I have developed a sensitivity to the feathers which make me sneeze. This one can easily be thrown into the washer and dryer and feels equivalently light as my down comforters. It weighs in at slightly over a pound (though I could only carry it onto the scale) and I absolutely love the lightness of it. I did wash it in the washer and dried it in a dryer on normal heat. Came out with no wrinkles and very fluffy. Five stars!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
L
Lenta Bear
Massapequa, US
★★★★★ 4
Nice Comforter, Thin Sheets
Color: Blue, Size: Queen, Color: Blue, Size: Queen
I bought this comforter set for my guest bedroom, and the price was great. It’s really pretty and fits the bed perfectly. It includes a comforter, a sheet set with pillowcases, and two pillow shams. It arrived vacuum-sealed, when I opened it, I was impressed by how soft it felt—just right for a comforter. It seems like it will be warm yet cooling at the same time, and I love its thickness. The only downside was the sheet set. While the comforter is fluffy and cozy, the sheets felt cheap—very thin—and I prefer them thicker. They’re labeled 100% polyester but are just too thin for my taste. If you’re not picky about sheets, this set would be perfect. They are soft, just not thick enough. Overall, I really like the comforter, but I’ll use my own sheets because of the thinness of the included ones. I would have given it five, but the sheets bring it down to four.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 6, 2026
S
shantel
Natrona Heights, US
★★★★★ 5
Beautiful Sage Green Set That is Super Soft and Cozy!
Color: Sage Green, Size: Queen
​I am absolutely in love with this sage green bedding set. The queen comforter has a gorgeous pre washed crinkled texture that gives the whole bedroom a really cozy, aesthetic look without needing to be ironed. It is incredibly fluffy and has just the right amount of weight to it, making it perfect to use all year round. The brushed sheets that come with the bed in a bag are surprisingly soft against the skin, and everything fit my queen mattress perfectly right out of the box. ​The color is a beautiful, calming sage green that matches my room decor perfectly. I have already washed the sheets and comforter once, and they held up great in the machine without losing their softness or shrinking.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 4, 2026
A
apaulcolypse
Bozeman, US
★★★★★ 4
Soft All-in-One Queen Bedding Set With Lightweight Comforter
Color: Beige, Size: Queen
This 7-piece queen bedding set is a solid all-in-one option for anyone looking to refresh a bedroom with a clean, aesthetic look without spending much. The comforter has a lightweight feel with a soft crinkled texture that gives it a relaxed, lived-in appearance while still looking modern and put together on the bed. The included sheets and pillowcases are soft and smooth against the skin, with enough comfort for year-round use. The comforter itself is light but still provides enough warmth for most seasons, making it practical for both warmer and cooler months. Fit is generally accurate for standard queen mattresses, and the set comes complete with everything needed, which makes setup simple and convenient. The overall look is cohesive, with a soft beige tone that blends easily into most room styles. While it is not a luxury heavyweight bedding set, it offers good comfort, style, and value for the price, making it a strong choice for guest rooms, first apartments, or an easy bedroom upgrade.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2026

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