Which MRCOOL Mini Split Works on 110V? A Beginner’s Guide
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MRCOOL is best known for bringing do-it-yourself installation to ductless mini splits. A mini split is a two-part heating and cooling system: a slim unit mounted high on an inside wall blows conditioned air into the room, and a compact outdoor unit holds the compressor. The two connect through a small hole in the wall with a line set, the copper tubing that carries refrigerant. Traditionally, a licensed technician had to connect and charge those lines, but MRCOOL’s DIY models come with pre-charged, quick-connect line sets so a handy homeowner can do more of the job.
The big question for many first-time buyers is power, because some mini splits need a 230V circuit like a clothes dryer while others run on a standard 110V/115V household circuit. Four of these five MRCOOL models list 115V or 120V power, and they differ in BTU size from 9,000 to 18,000, in whether they include a pre-charged DIY line set, and in efficiency and smart features; the 18,000 BTU listing does not state its voltage at all.
MRCOOL Mini Split Air Conditioners Compared
| Model | Voltage in Listing | BTU and Room Size | Pre-Charged Line Set | Efficiency |
|---|---|---|---|---|
| MRCOOL 12000 BTU Ductless Inverter Mini Split | 115V | 12,000 BTU, up to 550 sq ft | Not listed | Not listed |
| MrCool DIY Select Mini Split with Line Set | 120V | 12,000 BTU, 500 to 1,200 sq ft claimed | 11.5 ft quick-connect | 17.5 to 16.5 SEER2, 8.8 to 8.3 HSPF2 |
| MRCOOL DIY Select 12K BTU Mini Split | 115V (title says 155V) | 12,000 BTU, up to 550 sq ft | 11.5 ft quick-connect | Up to 17.5 SEER2, 9.0 HSPF2 |
| MRCOOL 9000 BTU Ductless Inverter Mini Split | 115V | 9,000 BTU, up to 400 sq ft | Not listed | SEER 14 |
| MRCOOL 18000 BTU Ductless Inverter Mini Split | Not listed | 18,000 BTU, up to 750 sq ft | Not listed | Not listed |
MRCOOL 12000 BTU Ductless Inverter Mini Split for Mid-Size Rooms
MrCool Comfort Made Simple
MRCOOL 12000 BTU Ductless Inverter Mini Split Air Conditioner & Heat Pump
Price and specifications are read from the Amazon product page and can change.
MRCOOL 12000 BTU Ductless Inverter Mini
Best for: Rooms up to 550 sq ft on 115V
Pros
- 115V power listed
- Heating and cooling
- 43 dB noise
- R-454B refrigerant
Cons
- Line set details not listed
- Efficiency ratings not listed
The MRCOOL 12000 BTU Ductless Inverter Mini Split Air Conditioner and Heat Pump is a 12,000 BTU system that the listing says heats or cools spaces up to 550 square feet. Its specifications list 115 volts and 586 watts, so it is one of the models designed around a standard household voltage. It uses R-454B refrigerant and runs at a listed 43 dB.
Like every model here, it is an inverter heat pump. The inverter compressor speeds up and slows down smoothly rather than switching on and off, which keeps temperatures steady and saves energy. The heat pump side reverses the flow of refrigerant in winter to bring warmth indoors, so one system handles both seasons. The listing describes streamlined DIY-friendly installation with less mess, but it does not say whether a pre-charged line set is included, and it does not give SEER2 or HSPF2 efficiency figures. The specifications also note that it requires a new outdoor unit, meaning it is a complete indoor-and-outdoor system rather than an add-on.
This suits homeowners cooling and heating a large bedroom, home office or small living area on a 115V circuit. If a pre-charged DIY line set is essential for you, the DIY Select models below state it clearly.
MrCool DIY Select Mini Split with Line Set and Labor Warranty
Mrcool Comfort Made Simple
MRCOOL DIY Select 12K BTU Mini Split Heat Pump, 11.5' Line Set, 155V, White
Price and specifications are read from the Amazon product page and can change.
MRCOOL DIY Select 12K BTU Mini
Best for: Bedrooms and offices wanting true DIY
Pros
- No vacuum pump or gauges needed
- Up to 17.5 SEER2, 9.0 HSPF2
- 5 dB(A) silent mode
- Voice assistant support
Cons
- Title says 155V, features say 115V
Best for: DIYers wanting installation labor backup
Pros
- Pre-charged 11.5 ft line set
- 1-year labor warranty
- WiFi app control
- Energy Star and AHRI certified
Cons
- Coverage range claim is broad
- Listed at 120V, confirm circuit
The MrCool DIY Select Mini Split w/Line Set and 1 YR Labor Warranty by IWAE is a 12,000 BTU (1 ton) DIY Select system sold with a one-year labor warranty from the seller, IWAE. The listing names a pre-charged 11.5-foot quick-connect line set, so you can set it up without professional refrigerant handling.
It lists 17.5 to 16.5 SEER2 cooling efficiency and 8.8 to 8.3 HSPF2 heating efficiency. SEER2 measures cooling efficiency over a season and HSPF2 measures heating efficiency, and higher is better for both. It is Energy Star and AHRI certified, Wi-Fi capable through the MrCool Comfort App, and comes with a remote. The specifications list 120 volts and 44.5 dB. The listing claims it covers 500 to 1,200 square feet, a much wider range than the other 12,000 BTU models suggest, so treat the upper end with caution and size by your own room.
This suits first-time DIYers who like the reassurance of a labor warranty. The next model offers similar hardware with slightly higher heating efficiency listed.
MRCOOL DIY Select 12K BTU Mini Split for True DIY Installs
The MRCOOL DIY Select 12K BTU Mini Split Heat Pump is the most clearly described 115V DIY system here. The features say it runs on 115V power for rooms up to 550 square feet, such as bedrooms and offices. The title, however, says 155V, which appears to be a typo, since the features and specifications both say 115V. Double-check with the seller before ordering.
The 11.5-foot pre-charged quick-connect line set means no vacuum pump, gauges, brazing or refrigerant handling are needed to get started. It lists up to 17.5 SEER2 and up to 9.0 HSPF2, the highest heating efficiency figure here, and runs as quietly as 17.5 dB(A) in silent mode overnight. It uses R-454B refrigerant, works with the MRCOOL Comfort App and voice assistants, and includes a remote. You will still need basic tools to mount brackets and tighten fittings; a good quarter-inch ratchet is handy for that kind of work.
This is the best match for a first-time buyer who wants a quiet, efficient 115V mini split and plans to install it themselves.
MRCOOL 9000 BTU Ductless Inverter Mini Split for Small Rooms
Best for: Small rooms up to 400 sq ft
Pros
- 115V power listed
- Heating and cooling
- 43 dB noise
Cons
- Lowest efficiency at SEER 14
- Line set details not listed
The MRCOOL 9000 BTU Ductless Inverter Mini Split Air Conditioner and Heat Pump is the smallest unit here, rated for spaces up to 400 square feet. It runs on 115 volts, heats and cools, and operates at a listed 43 dB.
Its listed efficiency is SEER 14, lower than the DIY Select models. The listing describes streamlined installation but does not mention a pre-charged line set, and it requires a new outdoor unit. The indoor unit measures 32.87 inches wide.
This suits a small bedroom, nursery, sunroom or garage office where a 12,000 BTU unit would be more than needed. Oversized units can cycle more and dehumidify less well, so right-sizing matters.
MRCOOL 18000 BTU Ductless Inverter Mini Split for Larger Spaces
Best for: Larger spaces up to 750 sq ft
Pros
- 18,000 BTU capacity
- Wi-Fi, Alexa and Google
- Follow Me feature
- Washable filter
Cons
- Voltage not stated in listing
- Loudest at 60 dB
The MRCOOL 18000 BTU Ductless Inverter Mini Split Air Conditioner and Heat Pump is the largest system here, rated for areas up to 750 square feet. It adds Wi-Fi with Google Assistant and Amazon Alexa support, a Follow Me feature that reads temperature at the remote, a washable filter and R-454B refrigerant.
Crucially for this guide, the listing does not state a voltage. Larger mini splits often need a 230V circuit, so do not assume this one runs on 110V; confirm the electrical requirement with the seller before buying. The listed noise level is 60 dB, the highest here. It is worth comparing with another 18,000 BTU mini split if you are sizing for a big space.
This suits open-plan living areas or large rooms, provided your electrical panel supports it.
How to Choose the Right MRCOOL Mini Split
Check voltage first. The 12,000 BTU, 9,000 BTU and DIY Select 12K list 115V, and the DIY Select with labor warranty lists 120V. The 18,000 BTU listing is silent. A licensed electrician can confirm whether your circuit can carry the load.
Size by square footage. Up to 400 square feet points to 9,000 BTU; up to 550 to 12,000 BTU; up to 750 to 18,000 BTU.
Decide on DIY. The two DIY Select models state a pre-charged quick-connect line set. For a broader look at the range, our Mr. Cool mini split guide covers more models.
Compare efficiency and noise. The DIY Select 12K lists the best heating efficiency and quietest silent mode.
FAQ
Does MRCOOL make a 110V mini split?
Yes. Four of these five list 115V or 120V power: the 12,000 BTU, 9,000 BTU, DIY Select 12K and DIY Select with labor warranty.
Is 110V the same as 115V or 120V?
These are all names for standard North American household voltage, so a 115V unit plugs into the same kind of circuit people call 110V or 120V. Check the amp rating your unit needs.
Do I need a technician to install an MRCOOL DIY mini split?
The DIY Select listings say the pre-charged line set means no vacuum pump, gauges or refrigerant handling. Electrical work should follow local codes.
Can these heat as well as cool?
Yes. All five are described as heat pumps.
Which is quietest?
The DIY Select 12K, as low as 17.5 dB(A) in silent mode.
Related reading: mr cool air conditioner.
