A couple relaxes on the sofa on a hot summer day under a white wall-mounted mini split

Updated October 2026 · 5 systems, no paid placements

Best Mini Splits in 2026

Five complete 12,000 BTU systems we'd shortlist for the room your central air never reaches: the bonus room, the sunroom, the garage shop. Ranked on buyer ratings, review volume and the specs each listing states, with the catch of each one spelled out (bigger rooms and multi-zone homes get their own rankings).

See the ranking Compare up to 3 mini splits

In short

Our top pickMountman 12,000 BTU 110/120V9.2/10. The one we'd start with.$429.98 on Oct 30, 2026, may have changed

The crowd favouriteSenville LETO 12,000 BTU2,187 buyer reviews, 7.9/10. Plenty of owners to learn from.$799.99 on Oct 30, 2026, may have changed

The most efficient on paperROVSUN 12,000 BTU Wi-Fi 115V20 SEER2 stated, 8.0/10. The best efficiency figure among the rest.$499.99 on Oct 30, 2026, may have changed

Short on time? The Mountman 12,000 BTU 110/120V is the one we'd start with, and the other four are here in case your room, your circuit or your budget says otherwise.

The ranking in detail

Single-zone mini splits · Mountman · Top pick

Mountman 12,000 BTU 110/120V

9.2Excellent · out of 10

Best for: a bonus room over the garage

Cools up to 750 sq ft
Runs on 110/120V power
Ultra-quiet 26dB sleep mode

The catch: Standard lines, so budget for a tech with a vacuum pump on install day.

4.5/5 from buyers349 buyer reviews$429.98 Price on Oct 30, 2026 · may have changed

See it on Amazon ↗Read the reviewaffiliate link to Amazon.com

Single-zone mini splits · Rellytech · Runner-up

Rellytech 12,000 BTU 19 SEER2 115V

8.1Very good · out of 10

Also available as: 12,000 BTU 20 SEER2 Wi-Fi

Best for: the bedroom your central air never reaches

12000 BTU, 19 SEER2
Quiet 42dB operation
90° vertical air swing

The catch: The 750 sq ft figure is the seller's best case; a sunny or top-floor room needs more.

4.4/5 from buyers349 buyer reviews$345.99 Price on Oct 30, 2026 · may have changed

See it on Amazon ↗Read the reviewaffiliate link to Amazon.com

Single-zone mini splits · ROVSUN · Top 5 pick

ROVSUN 12,000 BTU Wi-Fi 115V

8.0Very good · out of 10

Best for: one stubborn room that bakes every afternoon

12000 BTU heat and cool
20 SEER2, 115V
Quiet 28dB mute mode

The catch: The 28 dB figure is the lowest fan speed; on high it gets louder.

4.4/5 from buyers282 buyer reviews$499.99 Price on Oct 30, 2026 · may have changed

See it on Amazon ↗Read the reviewaffiliate link to Amazon.com

Single-zone mini splits · Senville · Top 5 pick

Senville LETO 12,000 BTU

7.9Very good · out of 10

Best for: one room that needs its own heating and cooling

12000 BTU heat pump
Heats down to 5F
Includes 16ft line set

The catch: No Wi-Fi control mentioned, so the remote does all the work.

4.4/5 from buyers2,187 buyer reviews$799.99 Price on Oct 30, 2026 · may have changed

See it on Amazon ↗Read the reviewaffiliate link to Amazon.com

Single-zone mini splits · Albott · Top 5 pick

Albott 12,000 BTU 115V

7.8Very good · out of 10

Best for: replacing a noisy window unit for good

Nominal capacity: 12,000 BTU
Seller-stated 18 SEER2
Supply voltage: 115 V

The catch: Its 4.1/5 buyer rating is the lowest of these five.

4.1/5 from buyers389 buyer reviews$399.99 Price on Sep 30, 2026 · may have changed

See it on Amazon ↗Read the reviewaffiliate link to Amazon.com

Product images: Amazon listings

Best rated by stated efficiency

The best-rated system in each SEER2 band, using the seller-stated SEER2 of the exact listing. On paper, a higher SEER2 cools the same room on less power.

Up to 19 SEER2	Mountman 12,000 BTU 110/120V · 9.2/10 · 19 SEER2
20 SEER2 or more	ROVSUN 12,000 BTU Wi-Fi 115V · 8.0/10 · 20 SEER2

How to choose

Size from a load calculation, not from the box. A nominal 12,000 BTU (one ton) label says nothing about your room on its own. Ask for a room-by-room cooling and heating load that accounts for insulation, windows and climate, and check the heating output the manufacturer publishes at your winter design temperature.
Match the supply voltage to your panel. Many 12,000 BTU listings run on 115 to 120 V, others need 208 to 230 V. Read the voltage in the exact listing, then have a licensed electrician confirm the circuit, breaker and outdoor disconnect before you order.
Check what the kit includes and who installs it. Line-set length, wall bracket, pre-charged refrigerant and quick-connect fittings differ between listings. Confirm the exact indoor and outdoor model combination and whether the warranty requires a licensed installer.

Comparison table

All 5 systems on one screen. Tap a column header to sort by what matters in your house: capacity, efficiency or the circuit you already have.

Comparison table: Best Mini Splits in 2026

Mountman 12,000 BTU 110/120V	Mountman	9.2	$429.98^†	12,000 BTU	19 SEER2	120 V	Single-zone	349
Rellytech 12,000 BTU 19 SEER2 115V	Rellytech	8.1	$345.99^†	12,000 BTU	19 SEER2	115 V	Single-zone	349
ROVSUN 12,000 BTU Wi-Fi 115V	ROVSUN	8.0	$499.99^†	12,000 BTU	20 SEER2	115 V	Single-zone	282
Senville LETO 12,000 BTU	Senville	7.9	$799.99^†	12,000 BTU	Not stated	Not stated	Single-zone	2,187
Albott 12,000 BTU 115V	Albott	7.8	$399.99^†	12,000 BTU	18 SEER2	115 V	Single-zone	389

^† Prices as of Sep 30, 2026 – Oct 30, 2026; they may have changed. The button always shows today's price.

Our 2026 rankings

A bigger room, or a head in every bedroom? Each ranking answers a different house, and every card names its #1.

All rankings →

#1: Rellytech 18,000 BTU 208-230V · 9.2/10Best 18,000 BTU Mini Splits in 20265 models ranked

#1: ROVSUN 3-Zone 28,000 BTU (9K/9K/9K) · 9.1/10Best Multi-Zone Mini Splits in 20265 models ranked

How we rank

Every system gets a rating out of 10. It weighs what buyers give it, how many of them there are, how completely the seller documents the specs, and our editors' read of how the systems compare. The highest rating wins; on an exact tie, the listing identifier decides.

We update the rankings when prices or models change, and a commission never moves a rating or a rank.

Read the methodology →Affiliate disclosure

45 % buyer rating, damped when a listing has fewer than 50 reviews.
35 % review volume, on a logarithmic scale up to 5,000 reviews.
20 % documentation: feature bullets, images and stated brand of the listing.
Our editors' read: where each system sits against the others in the ranking, on top of the three figures above.
Nominal capacity, SEER2 and supply voltage are shown only when the exact listing states them; nominal capacity is not the output you get on the coldest days.
Prices carry the date we recorded them. They may have changed since; the button shows today's offer.

Frequently asked questions

Which is the best mini split in 2026?

Our pick is the Mountman 12,000 BTU 110/120V, at 9.2/10 (excellent). It has 349 buyer reviews averaging 4.5/5, and its listing states 19 SEER2 and 120 V. Close behind: the Rellytech 12,000 BTU 19 SEER2 115V at 8.1/10.

How is this ranking built?

We start from 19 complete single-zone systems whose exact listing states 12,000 BTU with a buyer review record. Each one gets a rating out of 10 that weighs the buyer rating, the number of reviews, how completely the listing documents its specs, and our editors' read of how the systems stack up against each other.

Is a 12,000 BTU mini split the right size for my room?

Maybe, maybe not. 12,000 BTU/h (one ton) is a nominal capacity, not a room-size rating: insulation, windows, ceiling height, climate and how you use the room all change the load. A room-by-room load calculation from a qualified HVAC pro settles it before you spend the money.

Does a 12,000 BTU mini split need a 230 V circuit?

It depends on the exact listing. In this ranking, four listings state 110 to 120 V and one listing does not state a voltage. Either way, a licensed electrician confirms the circuit, the breaker and the disconnect before anything goes on the wall.

Are the prices up to date?

Each price is the one we recorded on Sep 30, 2026 – Oct 30, 2026, and it may have changed since. The button always opens the exact listing with today's price and seller.

Mini split capacity converter →Buying guide: how to choose a mini split →Best 18,000 BTU Mini Splits in 2026 →Best Multi-Zone Mini Splits in 2026 →All rankings →Comparison tool →

Single-zone mini splits →Senville →ROVSUN →Albott →Rellytech →Buying guides →