MRCOOL® E Star DIY 4th Gen 12k BTU Ductless Mini-Split Heat Pump Complete System 115V/60Hz

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A DIY cooling and heating option that pairs well with our DIY shed selection! With professional mini-split installation typically costing $1000 and up for labor alone, this DIY unit offers a cost effective way to uplift your new space.

Get $200 off with a purchase of any shed.

Introducing the latest in home comfort technology, with the 4th Generation MRCOOL® DIY 12K BTU, 22 SEER Ductless Heat Pump System. This powerful single-zone system has the capability of heating and cooling an area up to 500 sq. ft. It comes complete with a 12K condenser, 12K air handler, and a 25 ft. line set pre-charged with R-410A refrigerant. The line set also has quick connectors which require no special tools, equipment, or training to install. The MrCool DIY system also includes many features that make it stand out among its competitors. The first of which is its ability to achieve an outstanding 22 SEER efficiency rating allowing it to be Energy Star certified. This system has many operating modes to select from to suit the needs of the user, including HEAT, COOL, DRY (dehumidification), and SLEEP. It also has the Follow Me function that adjusts the temperature of the room based on the temperature being read by the hand-held remote control. The DIY features the convenience of being able to operate its modes and functions with your smartphone by using the Smart HVAC app.

The MrCool mini split is the only system on the market to offer a limited lifetime compressor warranty.

Warranty Information

MrCool distributor (hereinafter “Company”) warrants this product against failure due to defect in materials or workmanship under normal use and maintenance as follows. All warranty periods begin on the date of the original installation. If the date cannot be veried, the warranty period begins one hundred twenty (120) days from date of manufacture. The unit comes standard with a 5 year parts/7 year compressor warranty and is available with a limited lifetime compressor warranty only if certain conditions/requirements are met.

What does it Take


1-2 Days

(not included)


1-2 Days


1 Day

(not included)


1 Day

(not included)

Assembly Disclaimer: We're here to assist all skill levels, however, assembling our sheds may require a proficiency level similar to Scandinavian-style furniture, and requires basic tools, including a power drill. We're committed to supporting you throughout your woodworking journey. Contact us with any questions you may have!

Measurements & technical information

In stock, expect delivery within 2 - 4 weeks
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Gold Fin® condenser: corrosion-resistant coastal living
R-410A environmentally friendly refrigerant
Cooling capacity:
12000 BTU
Heating capacity:
12000 BTU
115 V
60 Hz
Max fuse breaker:
25 A
Min circuit ampacity:
19 A
Decibel rating (dBa):
Min ambient cool:
-13F - 122F
Min ambient heat:
-13F - 75F
Line set length:
Fan, quiet, auto cool
App available:
iOs, Android
Remote control:
Energy Star, AHRI
Condenser dimensions:
11.93" x 21.85" x 30.12" (DxHxW)
Condenser weight:
65.70 lbs
Air handler dimensions:
7.44" x 11.69" x 31.57" (DxHxW)
Air handler weight:
24.03 lbs
5-year Parts/7-year Compressor
Download specs sheet:
Download blueprint

Customer Reviews

SolidBuild shed reviews

Common questions & features guide

  • Most popular shed uses

    Most popular shed uses

  • Sheds with finished interior
  • Shed care and personalization
  • Easy to assemble DIY shed kit
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  • Measurements & technical info

What our customers say

  • best shed ever customer review

    Best backyard shed ever!

    “It came standard with a lot of things that were $$$ add-ons at other companies, like windows that open and double French doors. I also love that it’s non-toxic and eco-friendly”. Read full review.

    ‒ Schuyler Kent

  • Excellent product customer review

    Excellent product

    “Easy-to-follow assembly instructions, excellent responsiveness in answering my many questions. Looks like a custom build costing 3 times as much. No resemblance in appearance or quality to the kits at big box retailers.” Read full review.

    ‒ Tony P.

  • amazing shed company to deal with customer review

    An amazing company to deal with!

    “Company was so helpful leading up to my ordering my shed through the construction of the shed! Very responsive and great customer service. The quality of the shed is top notch.” Read full review.

    ‒ Renée Stilson

  • Awesome shed kit and fun to build customer review

    Awesome shed kit and fun to build

    “The shed kit went together easier than described and is awesome. It turned out too nice for our original purpose, we are enjoying our outdoor living space much more than we thought. The assistance was stellar as well and the value for money was great.” Read full review..

    ‒ Mark Lemke

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