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The 3rd generation MRCOOL DIY 12,000 BTU Mini Split is now Energy Star-rated and perfect for providing year-round comfort in smaller spaces within your home. Single zones such as bedrooms, offices, dens, etc., can all be cooled or heated with this device. In addition to being efficient, it is also very easy to use because it is Wi-Fi enabled and can be operated with a smartphone, Amazon Alexa or Google Assistant.

Increased Year-Round Efficiency

The MRCOOL DIY-12-HP-115B25 is one of the most efficient mini splits available, building on the success of their previous models. This unit features a 22.0 Seasonal Energy Efficiency Ratio (SEER), making it more affordable to cool your home year-round. Additionally, this model is Energy Star rated for improved energy efficiency.

  • Year-Round Use: Whether you need a fan, dryer, or heater, this product has it all--and can be used year-round for your comfort.
  • Precise Temperature Control: Find your perfect room temperature and maintain it with a programmable thermostat.
  • Multiple Fan Speeds: Pick between low, medium, high, and automatic fan speeds to best match your needs.

Install It Yourself

The MRCOOL 3rd Series Mini Split is easy to install by following the clear directions in the installation manual. You'll simply need to connect the indoor blower unit to the outdoor compressor via the 25-foot refrigerant line set, which is included.

Wi-Fi Enabled Comfort

Control this ductless system from anywhere with the MRCOOL Remote App (iTunesGoogle Play). Whether using your smartphone, Amazon Alexa or Google Assistant, total control is just the press of your finger or the sound of your voice away.

Additional Features

  • Included Remote Control: Operate the unit from across the room with an included remote control.
  • Automatic Restart: If a power outage occurs, the system will automatically resume operation in its previous settings.
  • Louver Position Memory: Moves the horizontal louver to the same position you had in your previous settings.
  • Sleep Mode: Runs the unit quietly and at its lowest speed for uninterrupted rest.
  • Turbo Mode: This fact-acting setting lets the unit reach your temperature in the quickest way possible.
  • Self-Clean: Allows the mini split to automatically clean and dry the evaporator.
  • Programmable Timer: Set a schedule that meets your lifestyle.
  • Follow Me: This feature lets the remote control relay to the unit the current temperature where you’re at for more.
  • Overview
  • Specifications
  • Our Promise to You
  • Warranty 
  • Delivery & Returns

Why We Love MrCool Products

MrCool is an industry leader in home HVAC systems, because of its commitment to providing innovative technology that is built on customer satisfaction. The company has decades of experience and offers a full range of products and services to meet the needs of both residential and commercial customers.

They are at the forefront of HVAC innovations, with a team of engineers constantly working to create the most energy-efficient and technologically advanced systems on the market. Their heating and cooling solutions are on the cutting edge of modern technology, and they are constantly upgrading their product lines to meet the changing needs of customers.

They also innovated the DIY heating and cooling systems, a product that allows homeowners to install or maintain their HVAC systems. This makes MrCool an ideal company for customers who want to save money while ensuring they are getting the best products and services available.
Key Specifications
Number of Zones1
Applicable for Indoor GrowingYes
Recommended Coverage Area500 sq. ft.
Seasonal Energy Efficiency Ratio (SEER)22
Safety CertificationsUL
AHRI Estimated Annual Cooling CostN/A
AHRI Estimated Annual Heating CostN/A
Energy StarYes
Total Cooling Capacity12,000 BTUs
Total Heating Capacity12,000 BTUs
Heat ModeYes
Mounting TypeWall
Line Set IncludedYes
Energy Efficiency Ratio (EER)12.5
California Residents
Installation TypeDo-It-Yourself (DIY)
Wi-Fi CapableYes
Zone Cooling Capacity12,000 BTUs
Zone Heating Capacity12,000 BTUs
Maximum Cubic Feet per Minute (CFM)N/A CFM
Number of Fan Speeds4
Minimum Operating Temperature - Cooling5 degrees F
Maximum Operating Temperature - Cooling122 degrees F
Minimum Operating Temperature - Heating-13 degrees F
Maximum Operating Temperature - Heating75.2 degrees F
Compressor TypeInverter
Remote ControlYes
Maximum Indoor Noise Level37 dB
Maximum Cooling WattageN/A W
Maximum Cooling Amperage19 Amps
Maximum Heating WattageN/A W
Maximum Heating Amperage19 Amps
Voltage110-120 V
Maximum Line Length82 ft.
Outdoor Unit Height21.85 in.
Outdoor Unit Width30.12 in.
Outdoor Unit Depth11.93 in.
Outdoor Unit Weight65.70 lbs.
Indoor Unit Height11.69 in.
Indoor Unit Width31.57 in.
Indoor Unit Depth7.44 in.
Indoor Unit Weight24 lbs.
Included Line Length25 ft.
Liquid Line O.D..25 in.
Suction Line O.D..50 in.
Manufacturer's Warranty7-Year Limited Compressor Warranty, 5-Year Limited Parts Warranty
Maximum Window Width23 in
Manufacturer's Warranty1-Year Limited Warranty

Smartdesk Pro understands the importance of providing our customers with their goods on time. We make every effort to ensure that our items are delivered as soon as possible and in excellent condition. Our team of highly trained professionals is always available to answer any questions or concerns you may have about your purchase.

We take the utmost care in packing each order with a lot of love and attention to detail so that you, our clients, may enjoy them. Thank you for being a loyal customer. We will do all we can to offer high-quality goods and services to you.

Thank you for putting your trust in us, it means a lot. We'll continue working hard to earn and maintain that trust. Thank you for being part of the Smartdesk Pro family!

Warranty Details

(Please note the general warranty does not apply to commercial units.) 

For details on commercial warranty, please contact us at

Sunpentown International Inc. warrants our products to be defect free in material and workmanship for a period of ONE YEAR from the date of purchase. Defective products may be sent back by the original purchaser or any subsequent owner within the warranty period, with proof of purchase date to Sunpentown Int’l.

Defective products will be repaired or replaced, at manufacturer’s discretion, free of charge. All replacement parts or units will be new or reconditioned. Parts or units, which are replaced, become the property of Sunpentown. Warranty after repair or replacement will not be extended beyond the original one-year period.

The warranty does not apply to any unit that has been tampered with, nor to damages incurred through improper use and care, faulty packing or mishandling by any common carrier.

The warranty does not apply to any unit that has been used outside of the US.

What is NOT Covered

  • Warranty does not include freight charges. 
  • Units used outside of the US 
  • Damage due to installation error, product abuse and/or misuse. 
  • Incidental or consequential damage caused by possible defects with this product. 
  • Labor cost incurred for the installation and/or removal of a possible defective unit. 
  • Damage to product caused by improper power supply voltage, accident, fire, floods or acts of nature. 
  • Failure of product resulting from unauthorized modifications to the product. 
  • Improper installation or failure to perform the necessary maintenance. 
  • Normal wear and tear on parts or replacement of parts designed to be replaced. 
  • Damage to personal property from use of product. · 
  • Replacement or repair of household fuses, circuit breakers, wiring or plumbing.

Repairs not covered by this warranty may be returned to Sunpentown, postage prepaid. All repairs or services will be performed at current cost for parts and labor plus return postage. Please carefully box your package for shipping and it is HIGHLY recommended to return product by insured or by traceable means. Sunpentown is NOT RESPONSIBLE for any packages lost or damaged by any of the carriers.

Manufacturer’s sole obligation and your exclusive remedy under this warranty are limited to such repair or replacement. This is a limited warranty and is in lieu of all other warranties, express or implied, including merchantability. This warranty gives you specific legal rights. 

You may also have other legal rights varying from state to state. If you have service or repair questions:

Do not return the product to the retailer from which it was purchased. 

Contact our customer service team (1-800-330-0388) for assistance.  To ensure the fastest possible resolution to the problem, please have the model number and purchase information on hand. 

If it is determined that you should return your product for repair or replacement – send the product along with your name, contact info and brief description of the problem to:

SUNPENTOWN INTERNATIONAL INC. Attn: Service Dept. 14625 Clark Ave. City of Industry, CA 91745

If the inspection shows that the product is defective, under our Limited Warranty, Sunpentown will attempt to repair or will replace the defective part or product at no cost to you.

Comparable substitutions are based on replacement product availability and at the sole discretion of the Manufacturer. If our inspection shows that the product is not defective under our Limited Warranty we will return it to you shipping charges prepaid.

Please note that the inspection process can take 7~10 business days from receipt of your product. Replacements and/or repairs normally take 2~5 working days, but can tack up to 6 weeks depending on product/part availability.

All orders ship free. We ship hundreds of orders daily to our happy customers. We keep them happy by being very responsive and transparent about shipping times. We take great care in ensuring that our products are handled and packaged carefully.

Below you will find a breakdown of how we handle and prioritize shipment:

Order Processing: Our quality assurance and order verification process is critical to ensuring that you receive your products on time and in great condition. We perform sound tests, quality checks, and packaging inspections on every order before it is sent to our warehouse.

This careful process usually takes 1-2 days, but in some cases, it may take up to 3 days.

We serve primarily in the lower 48 of the United States of America. If you are ordering from Hawaii and/or Alaska and other regions, please reach out to us directly and we will give you a quote.

If you want to ship us internationally, please let us know.

Shipping Costs and insurance: Shipping costs. Shipping is currently free for all orders. However, some orders to Hawaii and Alaska may incur a small fee. There may also be customs charges based on the countries we are shipping to.

We take great care of products in our shipping process, so if anything arrives damaged, just let us know and we'll send you a new one. It's quite rare that any items get broken when they're shipped but it does happen, which is why we take great care in using packaging that ensure safety of your items.

We offer 30 days returns. We will always try our best to accommodate your return requests.

Feel free to email us anytime at to review the status of your order or use the Contact us page.

MrCool Means Quality

An Industry Leader

MrCool is an industry leader in home HVAC systems, thanks to its dedication to providing innovative and cutting-edge technology that always puts customer satisfaction first. With decades of experience and a full range of products and services , MrCool is at the forefront of HVAC innovation.

Quality Performance and Features

MrCool versatile product line is made of high-quality materials and features advanced technology that sets them apart from other HVAC systems on the market. Whether you need to cool your home in the summer or keep it warm in the winter, MrCool has a product that is right for you. 

Built to Last

MrCool is known for making durable, high-quality HVAC systems that are designed to meet the needs of residential and commercial customers. Their products are built on cutting-edge technology that is constantly evolving to provide the most efficient and innovative solutions on the market.

See what our customers are saying

Frequently Asked Questions

How long does it take for my order to be processed?

We process your orders within 1-3 Business Days. Excludes Holidays and weekends. 

How long does it take to deliver an order?

Normal delivery takes 3 to 5 days, depending on the location. We do provide express processing with next-day delivery for an additional fee.

Can I inspect the goods upon receiving them?

Yes, you can open the parcel to view the product when you receive the order.

What should I do if there is a problem with my product?

Please notify our customer service about your problem and send the product back for repair or replacement.

What payment methods do you provide?

We accept PayPal along with American Express, Visa and Master Card credit cards.

Have a question? 

Call us:

(888) 242 - 4257

8 AM to 7 PM EST

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