The best 115V mini splits of 2026

Our picks at a glance

• Best overall: MRCOOL DIY 5th Generation 12k 115V - you can install it yourself, and it keeps heating down to -13F.
• Best for a small room: MRCOOL DIY 5th Generation 9k 115V - the same easy install, sized for a bedroom or office.
• Best DIY alternative: Klimaire DIY 12k 115V (KIWQ-KOIQ) - another one you can install yourself; its 9k sibling runs on a 15-amp circuit.
• Best with a professional install: Pioneer Quantum Ultra 12k 115V - the same cold-weather rating, sold direct by Pioneer.
• Best 12k for a 15-amp circuit: Cooper & Hunter Olivia Series 12k 115V - the one to know about if 20 amps isn't an option.
• Most efficient we can link to: ACiQ Standard 9k 115V - the cheapest to run of the 115-volt systems you can buy through us.

Why 115V matters

The appeal is simple: you skip the panel work. A 240-volt circuit can mean a new double breaker, heavier wire, and sometimes a panel upgrade. A 115-volt unit avoids most of that, which is why these are popular in apartments, additions, and older houses whose panels are already full - see best mini splits for an apartment and for a room addition.

The trade is size. These systems top out around 12,000 BTU, which is plenty for a bedroom, an office, a small living room, or an addition. If the sizing calculator says your room needs more, you're shopping for a 230-volt system.

The circuit question, answered

This is the part the marketing skips. A 115-volt mini split almost always needs its own circuit, and about seven in ten need a 20-amp one rather than the 15-amp circuit many household outlets are on. None needs more than 20 amps.

The figure that decides it is printed on the outdoor unit: the minimum circuit ampacity, which is simply the circuit size the unit needs. Each pick below tells you what it needs, and the electrical lookup covers every model we list. Unless you already have a suitable spare circuit, budget for an electrician.

Best overall 115V: MRCOOL DIY 12k

The MRCOOL DIY 5th Generation 12k 115V is the one we'd start with. It pairs 115-volt power with refrigerant lines that come pre-filled and connect without a vacuum pump, so the whole job is within reach of a handy homeowner, and MRCOOL's warranty still holds if you do it yourself. EPA's Section 608 guidance says connecting pre-charged lines still requires technician certification, so check that before you plan a self-install.

It keeps heating down to -13F, which makes it a real four-season system rather than an air conditioner with a heat setting. Plan on a dedicated 20-amp circuit.

Best 115V for a small room: MRCOOL DIY 9k

For a bedroom or a home office, the MRCOOL DIY 5th Generation 9k 115V installs the same way at a size that won't overpower a small room. Don't choose it to save on wiring, though: it needs the same 20-amp circuit as the 12k. Let the sizing calculator decide between them.

Best DIY alternative: Klimaire DIY

The Klimaire DIY 12k 115V is the other system here you can install yourself, with the same pre-filled lines and the same cold-weather rating as the MRCOOL. It needs a 20-amp circuit too. Its smaller sibling, the Klimaire DIY 9k 115V, is the only DIY pick on this page that can run on a dedicated 15-amp circuit. Register either one within 45 days to get Klimaire's longer warranty; the best DIY mini splits guide has the terms.

Best 115V with a professional install: Pioneer Quantum Ultra

If you're paying for the install anyway, the Pioneer Quantum Ultra 12k 115V matches the DIY picks on cold-weather heating, down to -13F, and Pioneer sells it direct. Your electrician sizes its circuit from the label on the outdoor unit.

Best 12k for a 15-amp circuit: Cooper & Hunter Olivia

Most 12,000 BTU systems on 115 volts need a 20-amp circuit. The Cooper & Hunter Olivia Series 12k 115V is the exception worth knowing about: it runs on a dedicated 15-amp circuit, and it's the most efficient 12,000 BTU system that does, of those we can link you to. One detail matters here: the breaker has to be 15 amps, not 20. It keeps heating down to -13F and needs a professional install. The Cooper & Hunter Olivia Midnight Series 12k 115V has the same ratings and the same circuit needs.

Most efficient 115V we can link to: ACiQ Standard 9k

If running cost matters most, the ACiQ Standard 9k 115V has the highest efficiency rating of any 115-volt system we can link you to, and it keeps heating down to -13F. It needs a professional install and a 20-amp circuit. The ACiQ Standard 12k 115V is a step down in efficiency on the same circuit. One 115-volt unit rates higher, the GREE Vireo R32 9.1k 115V, but we can't link to a listing for it yet.

The numbers behind the picks

A higher SEER2 means lower cooling bills.

How we picked

We only pick systems we can link to an exact listing, and no brand pays for placement. The ratings come from the manufacturers' own documents and their efficiency certificates; our data sourcing page explains how we check them.

Before you buy a 115V mini split

• Size the room first. If the sizing calculator puts the room above about 12,000 BTU, you need a 230-volt system.
• Check your circuit. Most 115-volt systems need a dedicated 20-amp circuit; the electrical lookup has each model's figure.
• Decide who installs it. A 115-volt DIY system is the easiest full install a homeowner can take on - see best DIY mini splits.

FAQ

Can a mini split run on 110V/115V? Yes. Single-room systems up to about 12,000 BTU come in 115-volt versions. Anything bigger needs 230 volts.

Does a 115V mini split plug into a regular outlet? Usually not. It almost always needs a circuit of its own, and about seven in ten need a 20-amp one rather than the 15-amp circuit many outlets use. Check the model's circuit size before you count on an existing circuit.

What size mini split can run on 115V? Up to about 12,000 BTU. Beyond that you need 230 volts.

Can a 115V mini split heat a room in winter? Yes. Every pick on this page keeps heating down to -13F, though it puts out less heat as it gets colder. In a very cold climate, read the cold-weather guide before you choose.

What's the best 115V mini split? The MRCOOL DIY 12k, because it pairs standard voltage with an install you can do yourself. If you're hiring a pro, look at the Pioneer Quantum Ultra 12k. If running cost matters most, the ACiQ Standard 9k. And if you only have a 15-amp circuit, the Cooper & Hunter Olivia 12k.

Sources

• Air-Conditioning, Heating, and Refrigeration Institute: AHRI Appendix M1 public detail for ACIQ-12ZS-HP115C / ACIQ-12WS-HP115C - ACiQ Standard 12,000 BTU R-454B 115V (ACIQ-12WS-HP115C / ACIQ-12ZS-HP115C), retrieved Jul 26, 2026.
• ENERGY STAR: ENERGY STAR exact row check for AHRI 216980866 - ACiQ Standard 12,000 BTU R-454B 115V (ACIQ-12WS-HP115C / ACIQ-12ZS-HP115C), retrieved Jul 26, 2026.
• HVACDirect / ACiQ: 12,000 BTU ACiQ Standard 23.2 SEER2 Single Zone Wall Mount Mini Split Heat Pump System - R454B | 115V - ACiQ Standard 12,000 BTU R-454B 115V (ACIQ-12WS-HP115C / ACIQ-12ZS-HP115C), retrieved Jul 26, 2026.
• Air-Conditioning, Heating, and Refrigeration Institute: AHRI Appendix M1 public detail for ACIQ-09ZS-HP115C / ACIQ-09WS-HP115C - ACiQ Standard 9,000 BTU R-454B 115V (ACIQ-09WS-HP115C / ACIQ-09ZS-HP115C), retrieved Jul 26, 2026.
• ENERGY STAR: ENERGY STAR exact row check for AHRI 216980865 - ACiQ Standard 9,000 BTU R-454B 115V (ACIQ-09WS-HP115C / ACIQ-09ZS-HP115C), retrieved Jul 26, 2026.
• HVACDirect / ACiQ: 9,000 BTU ACiQ Standard 24.5 SEER2 Single Zone Wall Mount Mini Split Heat Pump System - R454B | 115V - ACiQ Standard 9,000 BTU R-454B 115V (ACIQ-09WS-HP115C / ACIQ-09ZS-HP115C), retrieved Jul 26, 2026.
• Air-Conditioning, Heating, and Refrigeration Institute: AHRI Appendix M1 public detail for CH-RES12-115VO / CH-R12OLVWM-115VI - Cooper & Hunter Olivia 12,000 BTU R-454B 115V (CH-R12OLVWM-115VI / CH-RES12-115VO), retrieved Jul 24, 2026.
• Cooper & Hunter: Cooper&Hunter CH-RES12-115VO + CH-R12OLVWM-115VI official product page/support materials - Cooper & Hunter Olivia 12,000 BTU R-454B 115V (CH-R12OLVWM-115VI / CH-RES12-115VO), retrieved Jul 24, 2026.
• Cooper & Hunter: Cooper&Hunter warranty and official support pages - Cooper & Hunter Olivia 12,000 BTU R-454B 115V (CH-R12OLVWM-115VI / CH-RES12-115VO), retrieved Jul 24, 2026.
• Cooper & Hunter: Flared refrigerant piping installation evidence - Cooper & Hunter Olivia 12,000 BTU R-454B 115V (CH-R12OLVWM-115VI / CH-RES12-115VO), retrieved Aug 17, 2026.
• Cooper & Hunter: Flared refrigerant piping installation evidence - Cooper & Hunter Olivia 12,000 BTU R-454B 115V (CH-R12OLVWM-115VI / CH-RES12-115VO), retrieved Aug 29, 2026.
• ENERGY STAR: ENERGY STAR exact row check for AHRI 215864147 - Cooper & Hunter Olivia 12,000 BTU R-454B 115V (CH-R12OLVWM-115VI / CH-RES12-115VO), retrieved Jul 24, 2026.