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MRCOOL® DIY® ENERGY STAR®

MRCOOL DIY 5th Gen E-Star 9,000 BTU 115V Mini Split — Complete System

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MRCOOL DIY 5th Gen E-Star 9,000 BTU 115V Mini Split — Complete System

$2,330.00 USD
$2,912.50 USD $2,330.00 USD
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Total Line Set Length

See what to check before you order

See all the details

Five checks before you buy

Will this work for you?

You do not need every answer memorized. You do need these five parts of the plan to agree.

  1. 1. The size

    A heating and cooling load calculation should show that the space needs about 9,000 BTU. Square footage alone cannot make that call.

  2. 2. The circuit

    This is a 115V system. The manufacturer lists 18.0 A as the minimum circuit rating and 20.0 A as the largest allowed breaker or fuse. Have the circuit checked for this system.

  3. 3. The route

    The selected option covers 25.0 ft. Measure the real path, including bends and service room.

  4. 4. The power source

    Grid, battery, solar, and generator plans all need to support this model plus the other loads running at the same time.

  5. 5. The locations

    Make room for airflow, drainage, weather protection, service access, and a safe outdoor-unit support.

Can I run this? Compare systems
Your selected packageWhat will you receive?

Start with the three parts that make this a complete single-zone system. Open each item to see which parts come with the option you selected.

01Indoor air handlerOne indoor unit

This is the part that mounts inside the space and delivers the conditioned air.

02Outdoor condenserOne outdoor unit

This is the outdoor half of the matched heat-pump system.

03Pre-charged connection set25.0 ft in the selected option

The selected package provides the documented total route length shown above. Measure the actual path before ordering.

What you may still need: outdoor support, line covers, electrical parts, drains, fasteners, and weatherproofing depend on your site and installation.

Installation readinessCan you install it yourself?

What “DIY-oriented” really means

DIY-oriented quick-connect system; dedicated field wiring required

A DIY connection does not make every site or every step suitable for a first-time installer.

You should be comfortable with:
  • Locating and mounting both units safely
  • Planning condensate drainage
  • Protecting the line-set route
  • Following the manual for your system
  • Having an electrician handle the parts that require one
Plan the workWhat does installation look like?
  1. 1
    Check everything before you start

    Make sure the size, circuit, unit locations, line route, drainage, and local requirements all work together.

  2. 2
    Check the delivery

    Match the indoor unit, outdoor unit, selected line-set option, and documented package contents.

  3. 3
    Mount and route

    Secure both units, create the wall path, protect the lines, and give condensate a reliable way out.

  4. 4
    Complete the electrical work

    Follow the manual for your system and local electrical requirements.

  5. 5
    Start up and check

    Use the manual’s startup steps, look for drainage or connection problems, and keep the service path clear.

Can this be a weekend project? Sometimes—but the honest answer depends on the building, access, electrical work, weather, tools, and your experience. Work through these details before you schedule the job.

Power requirementsWill your battery, generator, or solar setup work?
Energy sourceGrid, solar, or generator
Storage and conversionBattery and inverter when used
This mini splitPlus every other load

Voltage is only the starting point. Make sure the inverter, batteries, charging, generator, weather, other loads, and extra power kept available can all support the system over time.

Estimate power needs
Finish the installationWhich accessories do you actually need?
Usually needed

A safe outdoor-unit support

Use a suitable pad, wall bracket, or other approved support for the equipment and site.

Compare mounting choices
Depends on the route

Line protection

Protect exposed refrigerant lines, control wire, and drain where the installation calls for it.

See line-set covers
Only when you need more reach

A compatible line-set extension

Measure first. Longer is not automatically better, and maximum length still applies.

See compatible extensions
Depends on the site and local code

Electrical protection and disconnect

Use the installation manual for this system and the electrical requirements for your location.

Review installation accessories
The full buying guideWhy might you choose—or skip—this system?

If you're looking for a 9,000 BTU mini split that runs on a 115V supply, this is the complete MRCOOL DIY 5th Generation package—not one loose piece of the system. You get the DIY-09-HP-WMAH-115D25-O indoor unit, the DIY-09-HP-C-115D25-O outdoor unit, and the standard 25 ft pre-charged line set. The indoor air handler has a white finish.

That makes it a useful starting point for a cabin, tiny home, workshop, trailer, or other small space. The part that still needs your attention is fit: the right capacity, a workable route between the two units, and enough electrical power for this exact model.

What will arrive with the system?

The standard package includes the line set shown for this model. Longer options keep that standard line and add the compatible pre-charged extension, couplers, and control wire listed for the length you choose.

Choose the line-set option by measuring the real path between the indoor and outdoor units. Include bends, wall thickness, and enough room for service. Longer choices use the standard line plus a compatible pre-charged extension and the connecting parts shown for that option; they are not one extra-long piece of tubing.

Is 9,000 or 12,000 BTU the better fit?

The honest answer comes from the room or building, not the product name. Insulation, windows, air leaks, sun, ceiling height, climate, people, and how quickly you want the space to recover all matter. A larger unit is not automatically a better one.

If you are still deciding, see how 9k and 12k systems differ or walk through the product finder. Use a proper heating and cooling load calculation before making the final call.

Can you use it with solar, batteries, or a generator?

You may be able to, but the 115V label does not answer that question by itself. Your inverter has to handle the equipment, your batteries have to cover the expected run time, and your charging source has to keep up with the mini split and everything else using power.

Try the power planner with your own assumptions. Then have the final circuit and power setup checked for this model and your site.

What should you check before you order?

  • Make sure the capacity matches a load calculation.
  • Confirm the circuit and connection required by this exact model.
  • Choose indoor and outdoor locations with good airflow, drainage, clearance, and service access.
  • Measure the full line-set route.
  • Review the selected model numbers, included parts, current availability, and warranty.

Want to check a number? The details below link back to the manufacturer document and page we used. When two supplied documents disagree, we say that the answer needs to be confirmed instead of quietly picking one.

System detailsWant to check every detail?
Use these specifications to compare systems and plan the installation. A heating and cooling load calculation still helps you choose the right size for your space.
Electrical
Phase / frequency Single phase / 60 Hz
Efficiency
EER2 14.0
HSPF2 Region IV 11.5
HSPF2 Region V 8.6
Refrigeration
Factory refrigerant charge 30.34 oz
Planning
Manufacturer coverage guidance Up to 400 sq ft Manufacturer guidance assumes ideal installation conditions; it is not a load calculation.
Operating limits
Cooling ambient range Outdoor -13°F to 122°F; indoor 60°F to 90°F
Heating ambient range Outdoor -13°F to 75°F; indoor 32°F to 86°F
Installation
Standard included line-set length 25 ft
Maximum line length 75 ft
Maximum elevation difference 49.2 ft (15 m)
Physical
Indoor unit dimensions (W × D × H) 31.57 × 7.44 × 11.69 in
Outdoor unit dimensions (W × D × H) 30.12 × 11.93 × 21.85 in
Indoor unit net / gross weight 24.91 / 35.49 lb
Outdoor unit net / gross weight 65.48 / 83.11 lb
Everything you need to install itWhich manuals go with this system?