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Complete system, ready to installMRCOOL DIY 5th Gen Single-Zone Mini-Split Complete System

MRCOOL® DIY 5th Gen · Single zone

MRCOOL DIY 5th Gen Single-Zone Mini-Split Complete System

4.8 out of 5 · 180 store reviews on Trustpilot
$2,329Free shipping to the 48 states
Sales tax only in CA and WA

2. Add what you’ll need to install it

Not in the box. Most installs add a line set cover, a disconnect, a whip and a pad.

Ships from Kentucky 2 to 4 business days after your order is verified,
then 3 to 7 business days by freight.

Sizing questions? Call +1 (844) 999-9725 Mon–Fri, 9–5 EST

You can install it yourselfPre-charged lines, no vacuum pump

Heats down to −13°FCools in summer, heats in winter

5 yr parts, 7 yr compressorCovers a DIY install

25 ft line set in the boxPre-charged and ready to connect

Authorized MRCOOL dealerFull manufacturer warrantyBest price guaranteed

What’s in the box, and what isn’t

You get both units and everything that connects them. The electrical parts and a base for the outdoor unit are separate, and most installs need them.

  • Outdoor unit, factory charged with R-454B refrigerant
  • Indoor wall unit with its mounting hardware
  • 25 ft pre-charged Quick Connect® line set, sealed at the factory. You can’t cut it, so any extra coils behind the outdoor unit.
  • Communication wire and drain hose
  • Remote control and Wi-Fi for the MRCOOL app, Alexa and Google
  • Install and owner’s manual

Not in the box

Code requires a disconnect within sight of the outdoor unit. The outdoor unit sits on a pad or hangs on a wall bracket. Tick them in step 2 above.

  • Disconnect switch, 60A, and an electrical whip
  • Outdoor pad, or a wall bracket (up to 36K)
  • The circuit and breaker from your panel
  • A line set cover, if you want the lines hidden outside

Will it fit your room?

Measure the room and multiply length by width. Your current pick is highlighted.

Room size, up toSizePowerPrice

Go one size up if the room has ceilings over 8 ft, lots of sun from south or west windows, poor insulation, or it’s a kitchen. A shady, well insulated room can stay at the low end. Full sizing guide

Can you really install it yourself?

Yes, if you can hang a heavy shelf and drill through a wall. The refrigerant lines come pre-charged, so there’s no vacuum pump and no gauges. Most people finish a first room in a day.

  1. Mount the indoor unitScrew the wall plate into studs, level it and drill one hole through the wall.
  2. Run the lines throughFeed the line set, communication wire and drain hose through the hole and hang the unit.
  3. Set the outdoor unitOn a level pad or a wall bracket within reach of the line set.
  4. Connect the Quick Connect fittingsThread them on by hand, then snug them with two wrenches.
  5. Wire the powerCircuit to the disconnect, whip to the unit. Hire an electrician for this part if you’d rather.
  6. Turn it on and testCheck the fittings for leaks, run cooling and heating, then connect the app.

“It was actually as easy to install as they claim it is… couldn’t be happier with the performance so far.”Jim, Trustpilot

“It was involved, but I’m fairly handy and found it very doable and everything works fine.”Walt, Trustpilot

The part people ask us about

The electrical. The outdoor unit needs its own circuit and a disconnect within sight of it. 9K and 12K run on 115V, 18K and up on 230V. The indoor unit is powered through the communication wire, so you don’t need an outlet inside.

If you’ve never added a circuit to your panel, have an electrician do only that part.

Read the install manual before you buy · Can you install it yourself?

Specs for the

Install and owner’s manualPDFRemote control manualPDFMRCOOL warrantyPDF BrochurePDF Compare the 3 DIY linesChart

Warranty, even when you install it yourself

MRCOOL covers DIY installs on its DIY lines, and we’re an authorized dealer, so you get the full warranty.

5 yearson parts
7 yearson the compressor
Lifetimecompressor option through registration and MRCOOL’s paid Care program

MRCOOL sets the terms, so read the warranty. How to register it.

Shipping and returns, in plain words

When it arrives

Up to 24 hoursWe confirm your order
2 to 4 daysWe pack it
3 to 7 daysIn transit

Business days, counted once your order is confirmed. Free shipping on kept orders in the 48 contiguous states. Hawaii and Alaska ship by quote.

How it’s delivered

Freight truck with a liftgate, set down at the curb. It may come in several boxes, so have someone help carry them in.

Box damaged? Refuse only the damaged item and keep the rest. We ship a replacement right away.

If you change your mind

Cancel before it ships and you get everything back except the 3% card processing fee. After it ships, email us first. The 3% fee, shipping both ways and MRCOOL’s 10% restocking fee come out of the refund. Return policy

  • MR COOL DIY IS THE BEST.

    “I’ve had for about a year now and the performance has been flawless. It was a diy installation and I didn’t have any problems.”

    Mr. Baker

  • Best price and fast shipping

    “Good experience, best price and fast shipping. Had a question and they got back to me quickly. I bought the Mr. Cool 36000 btu 3 zone mini split.”

    Barry Bowen

  • Great people

    “Easy to talk with, made sure I was getting the right system for my needs, great price, and followed through with communications till delivered.”

    Pete Sweger

  • As easy as they claim

    “It was actually as easy to install as they claim it is… couldn’t be happier with the performance so far.”

    Jim

  • Piece of ‘Cake’

    “The rep on the phone was helpful with confirming that… I’m amazed at how straightforward the process is. Should be fun, and I’ll save a lot of money.”

    Byron Gabrielsen

  • DIY 2 zones, 18k

    “Packaging and shipping was great. Response time to questions was good. The two zones are performing nicely, and super quiet!”

    K. Westfall

  • Delivery handled

    “Your help coordinating and managing the delivery was excellent. You have a great team.”

    Andy Arenth

  • Very helpful sales

    “Cool-minisplits website beat everyone on price… I called and found out that they are very reliable… Items shipped out quickly and arrived in good condition.”

    Robert Johnson

  • Great customer support

    “The order came quickly. One part was damaged by the carrier so I called and they immediately shipped a new part.”

    Zac H

  • Great and honest business

    “The 24k Mr Cool was a perfect solution for my garage… Easy install and the staff are always there to answer any questions.”

    Todd Bailey

  • Easy install

    “Easy install. Took me 2 full days to install 4 wall units.”

    Michael

  • Mr. Cool as a DIY project

    “I was very interested in the DIY portion of the product. It was involved, but I’m fairly handy and found it very doable and everything works fine.”

    Walt

  • Great service

    “Purchase went without a problem and all my questions were answered without delay. I was notified when the unit shipped.”

    Scott Iverslie

  • Attention to detail

    “I threw him so many curveballs and order changes and he still got it all correct… Appreciate all the personal attention to detail and following up.”

    Tim Hedrick

  • Top notch

    “Their customer service is too notch! The product is amazing!!!! … I recommend this to any Contractor any homeowner anyone who’s looking for a mini split system!”

    Dean R Sun
Read all 180 reviews on Trustpilot

Questions people ask before buying

Do I need an HVAC technician?

Not for the refrigerant side. The line set is pre-charged, so there’s no vacuum pump, brazing or refrigerant handling. You might want an electrician for the circuit.

Can I plug it into a regular wall outlet?

No. Even the 115V sizes need their own dedicated circuit and a disconnect switch near the outdoor unit.

What if my run is longer than 25 ft?

Longer pre-charged line sets and coupler kits extend it, up to 75 ft. Check the line set chart in the manual for the part that fits your size. The line set can’t be cut, so extra length coils behind the outdoor unit.

Does it really heat in winter?

Yes, it keeps heating down to −13°F outside. In very cold areas, keep a backup heat source for the coldest nights.

Can I control it from my phone?

Yes, with the MRCOOL app over Wi-Fi, and with Alexa or Google Assistant. The remote works without any of that.

What if it shows up damaged?

Refuse only the damaged item and keep the rest. Tell us and we’ll ship the replacement right away at our cost.

Do you help with the install?

We don’t do installs or install support. Call before you buy and we’ll help you pick the right size. After that, the manual and MRCOOL support are the place to go.

Full product description

MRCOOL DIY® 5th Generation Single-Zone Mini Split System

This MRCOOL DIY® 5th Generation single-zone mini split system is a complete heating and cooling solution for homeowners who are done dealing with window units and portable ACs that are loud, inefficient, and temporary. It provides permanent, year-round comfort for a single room, garage, workshop, or addition, without requiring professional HVAC installation.

The system is sold as a matched package that includes both the outdoor condenser and the wall-mounted indoor air handler, ensuring proper performance and compatibility. Everything needed for installation is included, and no special tools, vacuum pumps, or refrigerant handling are required. If you are comfortable with basic home improvement projects, this system can be installed on your own schedule, saving significant labor costs.

DIY installation is made possible by the pre-charged Quick Connect® line set, which comes factory sealed with R-454B refrigerant already inside. The included 25 ft line set is part of the system and cannot be removed or exchanged for a different length. Installation is completed by tightening the connections with a standard wrench, with no vacuuming, brazing, or HVAC training required.

If the full line set length is not needed, the excess can be neatly coiled behind the outdoor condenser without affecting system performance, as long as the line set is not cut or modified.

The wall-mounted indoor air handler delivers quiet, consistent airflow and maintains steady temperatures without the hot and cold swings common with window units. Temperature and mode adjustments can be made using the included remote or through the SmartHVAC app, allowing control from anywhere. Voice control through Amazon Alexa and Google Assistant is supported but not required for normal operation.

This system is available in multiple capacities and power options to match different spaces and electrical setups. The 9k and 12k BTU models operate on 115V power and are well suited for standard rooms and smaller areas. The 18k, 24k, and 36k BTU models operate on 230V power and are intended for larger rooms, garages, workshops, and open spaces that require higher output and efficiency.

Warranty coverage is designed for long-term ownership. The system includes a standard 7-year compressor warranty and a 5-year parts warranty. Homeowners who enroll in the MRCOOL Care auto-ship program can upgrade coverage to a limited lifetime compressor warranty.

What Is Included

  • DIY® 5th Gen outdoor condenser, factory charged with R-454B

  • DIY® 5th Gen wall-mounted indoor air handler

  • 25 ft factory-sealed pre-charged Quick Connect® line set

  • Communication wire and drain hose

  • Remote control and WiFi dongle

This system is a practical upgrade for homeowners who want dependable heating and cooling, cleaner installation than window units, and the ability to do the work themselves without cutting corners.

Ready to order?

DIY 5th Gen, complete system, free shipping to the 48 states.