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DIY-12-HP-WM-115D25-O

MRCOOL DIY 5th Gen E Star 12K BTU Single Zone Mini Split Complete System 115V

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  • 🛠️ Easy DIY Install — No Special Tools Required
  • Energy Star® Efficient Heating & Cooling
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Stop overpaying for HVAC. Take control of your home comfort this weekend.

The MRCOOL DIY 5th Gen 12k BTU Mini Split puts powerful, efficient heating and cooling in your hands. This isn't just an air conditioner. It is a complete climate solution that you install yourself. You save thousands on professional labor costs. You get industry-leading efficiency. You get a home that feels exactly how you want it to feel, all year long.

This 12,000 BTU unit is the sweet spot for bedrooms, home offices, garages, or additions up to 500 square feet. It runs quietly, uses less energy than older units, and connects to your phone for total control from anywhere.

MRCOOL DIY 5th Gen E Star Single Zone Mini Split Complete System front view

MRCOOL DIY 5th Gen E Star Single Zone Mini Split Complete System line set MRCOOL DIY 5th Gen E Star Single Zone Mini Split Complete System controls

Take Charge of Your Home Climate

  • Keep Your Cash: Skip the expensive HVAC contractor. The pre-charged Quick Connect® line sets mean you click it together. No vacuum pump needed. No special training required.
  • Real Comfort, Fast: The "Follow Me" feature tracks the temperature right where you are sitting, not just up on the wall. No more hot or cold spots.
  • Built for Extremes: It heats when it is -13°F outside and cools when it is 122°F. Your weather won't beat this machine.
  • Sleep Soundly: The unit runs whisper-quiet. You won't have to turn up the TV or shout to talk.


Specifications

  • Installation Type: DIY (Do-It-Yourself)
  • Mounting Style: Wall Mounted
  • Outdoor Operating Temp (Heat): -13°F to 75.2°F
  • Outdoor Operating Temp (Cool): -13°F to 122°F
  • Number of Zones: 1


Choose the Right Size

  • 150 – 350 sq ft: 9,000 BTU (9k)
  • 351 – 500 sq ft: 12,000 BTU (12k) — [This Model]
  • 501 – 750 sq ft: 18,000 BTU (18k)
  • 751 – 1,000 sq ft: 24,000 BTU (24k)
  • 1,001 – 1,500 sq ft: 36,000 BTU (36k)


Experience The Difference In Quality

  • Cut Energy Bills: This unit is ENERGY STAR® Certified with an ultra-high 22 SEER2 rating. You use less electricity to get more comfort.
  • All-Season Performance: A powerful heat pump provides cozy warmth in winter and crisp cooling in summer. One unit does it all.
  • Truly DIY Setup: The line sets come pre-charged with R-454B refrigerant. You simply connect them. No cutting, brazing, or vacuuming is necessary.
  • Smart Home Ready: Control your climate from the SmartHVAC app, Amazon Alexa, or Google Assistant. Set schedules or change temps before you even get home.
  • Customized Airflow: The "Follow Me" function senses temp at the remote location. The unit adjusts automatically to keep you comfortable right where you are.
  • Silent Running: Advanced technology keeps the indoor air handler and outdoor condenser quiet. It blends into the background of your life.

Everything A DIYer Needs

  • Indoor Wall-Mounted Air Handler
  • Outdoor Condenser Unit
  • 25' Pre-Charged DIY Line Set & Communication Cable
  • Wireless Remote with "Follow Me" Technology
  • Installation Accessories & Manual
MRCOOL DIY 5th Gen E Star Single Zone Mini Split Complete System goldfins

Rest Easy With Solid Protection

  • 7-Year Compressor Warranty
  • 5-Year Parts Warranty
MRCOOL DIY 5th Gen E Star Single Zone Mini Split Complete System angled view

Frequently Asked Questions

Can I install the MRCOOL mini split myself?

Yes. The system uses pre-charged Quick Connect® line sets. You do not need a vacuum pump or a licensed HVAC technician to install it comfortably.

What size room does a 12k BTU mini split cool?

A 12,000 BTU mini split effectively cools and heats rooms between 350 and 500 square feet. This is ideal for master bedrooms, garages, or large sheds.

Does this unit heat and cool?

Yes. This is a heat pump system. It provides efficient air conditioning in the summer and reliable heating in the winter down to -13°F.

Is the MRCOOL 5th Gen WiFi enabled?

Yes. It works with the SmartHVAC app, Amazon Alexa, and Google Assistant. You can control temperature and modes from your smartphone or voice device.

What is the voltage requirement for this unit?

This 12k BTU unit runs on standard 115V power. Verify your specific electrical setup in the manual before purchasing to ensure compatibility.

Best Price Guarantee

You'll get the best price available at Wild Oak Trail! We'll match anyone who has it lower! 

We love to chat! Give us a call and we'll see what we can do to get you the best deal!

Conditions of our 100% Price Match Guarantee:

  • Contact us to discuss the Price Match so we can look up the competitors price

  • Buy one, get one free offers and Rebates are not eligible

  • The item must be in stock on the competitors website

  • The competitor must be an online store, not a retail location

  • The website can't be a discounter or auction website ( such as eBay, overstock, etc.)

  • The company must be an Authorized Retailer of the product in question

  • The Price Match Guarantee is based on the final price of the product including shipping and taxes

Why Buy From Wild Oak Trail? 

We’re a family-run business. My Wife Hailey and I run this business with our small staff of 3 awesome people. When you shop with Wild Oak Trail, you're supporting real people, not a big corporation.

We truly care. We’re here before, during, and after your purchase. Good products and great service—that’s how we earn your trust. We see and celebrate EVERY sale that comes in!

We choose quality. If we wouldn’t use it ourselves, we won’t offer it. Our goal is to make you happy enough to tell your friends.

Thanks for supporting our family and being part of the Wild Oak Trail community!

Description

Stop overpaying for HVAC. Take control of your home comfort this weekend.

The MRCOOL DIY 5th Gen 12k BTU Mini Split puts powerful, efficient heating and cooling in your hands. This isn't just an air conditioner. It is a complete climate solution that you install yourself. You save thousands on professional labor costs. You get industry-leading efficiency. You get a home that feels exactly how you want it to feel, all year long.

This 12,000 BTU unit is the sweet spot for bedrooms, home offices, garages, or additions up to 500 square feet. It runs quietly, uses less energy than older units, and connects to your phone for total control from anywhere.

MRCOOL DIY 5th Gen E Star Single Zone Mini Split Complete System front view

MRCOOL DIY 5th Gen E Star Single Zone Mini Split Complete System line set MRCOOL DIY 5th Gen E Star Single Zone Mini Split Complete System controls

Take Charge of Your Home Climate

  • Keep Your Cash: Skip the expensive HVAC contractor. The pre-charged Quick Connect® line sets mean you click it together. No vacuum pump needed. No special training required.
  • Real Comfort, Fast: The "Follow Me" feature tracks the temperature right where you are sitting, not just up on the wall. No more hot or cold spots.
  • Built for Extremes: It heats when it is -13°F outside and cools when it is 122°F. Your weather won't beat this machine.
  • Sleep Soundly: The unit runs whisper-quiet. You won't have to turn up the TV or shout to talk.


Specifications

  • Installation Type: DIY (Do-It-Yourself)
  • Mounting Style: Wall Mounted
  • Outdoor Operating Temp (Heat): -13°F to 75.2°F
  • Outdoor Operating Temp (Cool): -13°F to 122°F
  • Number of Zones: 1


Choose the Right Size

  • 150 – 350 sq ft: 9,000 BTU (9k)
  • 351 – 500 sq ft: 12,000 BTU (12k) — [This Model]
  • 501 – 750 sq ft: 18,000 BTU (18k)
  • 751 – 1,000 sq ft: 24,000 BTU (24k)
  • 1,001 – 1,500 sq ft: 36,000 BTU (36k)


Experience The Difference In Quality

  • Cut Energy Bills: This unit is ENERGY STAR® Certified with an ultra-high 22 SEER2 rating. You use less electricity to get more comfort.
  • All-Season Performance: A powerful heat pump provides cozy warmth in winter and crisp cooling in summer. One unit does it all.
  • Truly DIY Setup: The line sets come pre-charged with R-454B refrigerant. You simply connect them. No cutting, brazing, or vacuuming is necessary.
  • Smart Home Ready: Control your climate from the SmartHVAC app, Amazon Alexa, or Google Assistant. Set schedules or change temps before you even get home.
  • Customized Airflow: The "Follow Me" function senses temp at the remote location. The unit adjusts automatically to keep you comfortable right where you are.
  • Silent Running: Advanced technology keeps the indoor air handler and outdoor condenser quiet. It blends into the background of your life.

Everything A DIYer Needs

  • Indoor Wall-Mounted Air Handler
  • Outdoor Condenser Unit
  • 25' Pre-Charged DIY Line Set & Communication Cable
  • Wireless Remote with "Follow Me" Technology
  • Installation Accessories & Manual
MRCOOL DIY 5th Gen E Star Single Zone Mini Split Complete System goldfins

Rest Easy With Solid Protection

  • 7-Year Compressor Warranty
  • 5-Year Parts Warranty
MRCOOL DIY 5th Gen E Star Single Zone Mini Split Complete System angled view

Frequently Asked Questions

Can I install the MRCOOL mini split myself?

Yes. The system uses pre-charged Quick Connect® line sets. You do not need a vacuum pump or a licensed HVAC technician to install it comfortably.

What size room does a 12k BTU mini split cool?

A 12,000 BTU mini split effectively cools and heats rooms between 350 and 500 square feet. This is ideal for master bedrooms, garages, or large sheds.

Does this unit heat and cool?

Yes. This is a heat pump system. It provides efficient air conditioning in the summer and reliable heating in the winter down to -13°F.

Is the MRCOOL 5th Gen WiFi enabled?

Yes. It works with the SmartHVAC app, Amazon Alexa, and Google Assistant. You can control temperature and modes from your smartphone or voice device.

What is the voltage requirement for this unit?

This 12k BTU unit runs on standard 115V power. Verify your specific electrical setup in the manual before purchasing to ensure compatibility.

Best Price Guarantee!

Best Price Guarantee

You'll get the best price available at Wild Oak Trail! We'll match anyone who has it lower! 

We love to chat! Give us a call and we'll see what we can do to get you the best deal!

Conditions of our 100% Price Match Guarantee:

  • Contact us to discuss the Price Match so we can look up the competitors price

  • Buy one, get one free offers and Rebates are not eligible

  • The item must be in stock on the competitors website

  • The competitor must be an online store, not a retail location

  • The website can't be a discounter or auction website ( such as eBay, overstock, etc.)

  • The company must be an Authorized Retailer of the product in question

  • The Price Match Guarantee is based on the final price of the product including shipping and taxes

Why Buy From Us

Why Buy From Wild Oak Trail? 

We’re a family-run business. My Wife Hailey and I run this business with our small staff of 3 awesome people. When you shop with Wild Oak Trail, you're supporting real people, not a big corporation.

We truly care. We’re here before, during, and after your purchase. Good products and great service—that’s how we earn your trust. We see and celebrate EVERY sale that comes in!

We choose quality. If we wouldn’t use it ourselves, we won’t offer it. Our goal is to make you happy enough to tell your friends.

Thanks for supporting our family and being part of the Wild Oak Trail community!