MRCOOL DIY® 5th Gen 12,000 BTU Multi-Zone Mini Split Air Handler 230V (DIY-12-HP-WMAH-230D25-O)

MRCOOLSKU: DIY-12-HP-WMAH-230D25-O
47 reviews

Price:
Sale price$689.00 Regular price$799.00SAVE 13%
In Stock
Estimated delivery: Sep 7th-16th
Free Curbside Delivery — carrier calls to schedule

Free Curbside Delivery

Included on every order
Ships free by freight carrier. Your order leaves the warehouse tracked, on a palletized freight truck.
The carrier calls ahead. You'll schedule a delivery window that works for you before the truck heads out.
Delivered to the curb. The item is placed at the end of your driveway. Moving it inside is your responsibility, so plan to have help on hand for heavy pieces.
Before you sign: inspect the packaging for damage. Signing the delivery receipt confirms it arrived in good condition.
In-Home Protection Plan
Home Outlet Direct + CPS

Add an Extended Protection Plan by CPS and Enjoy Peace of Mind!

Protection Plan Benefits:
  • Covers 100% parts and labor for product defects in materials and workmanship
  • Replacement of product if it cannot be repaired
  • No deductibles
  • Protection from dust, heat and internal humidity damage
  • Damage caused by power surges
  • In-home service
Full Coverage Details
No deductibles
International coverage
Easy claims process

Description

The 5th Generation MRCOOL® DIY® 12K BTU Ductless Mini-Split Heat Pump is an efficient and versatile climate control solution for spaces up to 550 sq. ft. Designed with homeowners in mind, this system offers a true DIY installation process, eliminating the need for specialized tools or professional assistance. This makes setup quick, straightforward, and cost-effective. One of its standout features is the pre-charged 25-foot DIY® QuickConnect® line set, pre-filled with R-454B refrigerant.

This eliminates the need for vacuuming, significantly reducing installation time and expenses. The included DIYPRO® cable further streamlines installation by removing the need for electrical conduit while also offering enhanced durability and protection against the elements. Operating the system is simple and convenient, with multiple control options available. Adjust temperature settings with the wireless remote, the SmartHVAC app for iOS and Android devices, or hands-free voice commands via Amazon Alexa and Google Assistant. For personalized comfort, the Follow Me function ensures consistent temperature regulation by adjusting airflow based on the remote’s location, while Dry Mode helps control excess humidity.

Built for longevity, the Gold Fin® Condenser provides superior corrosion resistance, making it ideal for coastal environments. Supported by industry-leading warranties—including a limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty—this MRCOOL® DIY® system delivers reliable, year-round comfort with smart features and effortless installation.

Features

  • Intertek listed 5031495
  • Easy DIY installation
  • Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
  • Keep the included remote close by, and MRCOOL DIY®'s Follow Me® function will track the air temperature around you to ensure maximum comfort.
  • The MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box.
DIMENSIONS & WEIGHT
Dimensions
7.44" D x 11.63" H x 31.57" W
GENERAL INFORMATION
Mount Type
Wall
Color
White
Max Coverage Area
550 sqft
Oscillation
Yes
Quiet Mode
Yes
CAPACITY & PERFORMANCE
Cycle
60
ELECTRICAL REQUIREMENTS
Voltage (V)
208/230
Phase
1
FILTER & HEATING
Filter Type
Reusable
Auxiliary Heater Included
No
Auxiliary Heater Available
No
CONTROLS & CONNECTIVITY
Fan Only Option
Yes
Auto Cool
Yes
WIFI Compatibility
Yes
APP Compatibility
Yes
Works with IOS
Yes
Works with Android
Yes
Remote Control Included
Yes
SAFETY
UL Listed
Yes
ETL Listed
Yes
AHRI Certified
Yes
Has Batteries
Yes
Contains Electronics
Yes
Contains Chemicals
Yes
Contains Aerosol
Yes
Contains Compressed Gas
Yes
Proposition 65 Warning
Yes
WARRANTY
Registered Warranty
Extended Limited Lifetime*
Base Parts Warranty
5
Base Compressor Warranty
7

MRCOOL Mini Split BTU Guide

Drawn to scale — 1 square = 2 × 2 ft
36K BTU
24K BTU
18K BTU
12K BTU
9K BTU
6K BTU
6K BTU up to 250 sq ft · Small bedroom, office
9K BTU up to 375 sq ft · Bedroom, home office
12K BTU up to 500 sq ft · Large bedroom, den
18K BTU up to 750 sq ft · Living room, master suite
24K BTU up to 1000 sq ft · Open living area
36K BTU up to 1500 sq ft · Great room, small home
Between sizes? Round up. A slightly larger unit runs efficiently at partial load — an undersized one runs constantly.
Shipping
  • Free Shipping on all orders.
  • Large Appliances: Ship via Curbside Delivery — the carrier delivers to your property but not inside your home.
  • Small Items: Ship via standard ground delivery (FedEx or similar), such as small appliances, range hoods, sinks, faucets, and accessories.
Full shipping policy
Returns
  • 30-Day Return Policy: Return requests must be submitted within 30 days of your delivery date. We cannot process returns after this period.
  • Return Requirements: Products must be unused, uninstalled, and in their original packaging (including box and pallet) to qualify.
  • Restocking Fee: A restocking fee may apply and varies by brand.
Full returns policy
Authorized MRCOOL Dealer
Full manufacturer warranty on every MRCOOL product we sell.

Customer Reviews

Based on 47 reviews
87%
(41)
11%
(5)
2%
(1)
0%
(0)
0%
(0)
J
Jim M. (Los Angeles, CA)
Easy to install and working great.

I needed to replace another unit that a previous contractor didn't do any part of that installation correctly, and the condensation line was leaking inside the house, running down the wall since that installation!! The indoor coil was 1-1/2" out of level, the line set wasn't wrapped, the electrical was tapped into the same circuit as the garage light and outlets...it was a mess.

It took me more time to demo the old unit out than to install the one I bought from you.

Thank you.

B
Bill (Philadelphia, PA)
Very pleased.

Very pleased with the price, delivery, ease of installation, and above all during this heatwave it is working excellently.

N
Natalie N. (San Jose, CA)
Perfect for our needs!

I ordered a 2 zone unit for the bedrooms in our home. It took a few months to arrive (manufacturer issue, nothing to do with HOD, and we were contacted on more than one occasion with an order update which was much appreciated!), but when it did arrive was very easy to install. Both the heat and AC function work perfectly, and our family is very happy!

R
Robert W. (Marietta, GA)
Decent Company

I ordered a HVAC system and it arrived in a timely manner and with no apparent issues. I thought the system was defective once installed but it was the installers fault who wired it wrong. My only issue would be the fee (30% I believe) to return a defective item within the 30 day return policy. If it is defective the customer shouldn't have to pay a fee to return an item that is not operating as designed. Other than that this is a good company.

P
Peter K. (Phoenix, AZ)
Pretty Easy Install and Works Great!

Installed my own central HP system. It was a bit of work but nothing beyond a person with basic mechanical and electrical skills. It took me a while because I had to remove the existing electric forced air furnace from a pretty tight place. Some custom sheet metal work and a bit of custom electrical too. Worked perfectly when powered up and I actually like the thermostat provided, although I wish it was clearer how to set up a temperature set-back schedule. Pre-charged refrigerant piping was something new and I liked that too. The best thing is that my electric utility forked out $4,000 and that paid for the unit!

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