Most Efficient Mini Split Heat Pump with Highest SEER Ratings

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Here is a review of 8 ductless mini split systems with the highest efficiency ratings. They are listed from smallest to largest in one, two and three zone models. Many are called air conditioner heat pumps, which is a little redundant because a heat pump supplies both air conditioning and heating.

What are the Highest SEER Mini Split Heat Pumps?

  • #1 Gree 9,000 BTU 38 SEER SAPPHIRE Wall Mount Ductless Mini Split
  • #2 Mitsubishi 9,000 BTU 24.6 Seer Single Zone Ductless Mini Split
  • #3 PIONEER WYS009GMFI22RL Mini Split Heat Pump
  • #4 Daikin 9,000 BTU 20 SEER Low Ambient Ductless Mini-Split
  • #5 Gree 12,000 BTU 30.5 SEER SAPPHIRE Wall Mount Ductless Mini Split
  • #6 MrCool DIY 12k BTU 22 SEER Ductless Heat Pump Split System 3rd Generation
  • #7 Senville SENA-18HF/D Dual Zone Cold-Climate Heat Pump
  • #8 Senville 28,000 BTU Tri Zone Mini Split SENA-30HF/T

Most Efficient Mini Split Heat Pump Overviews

Whether you’re just researching the highest SEER ductless systems or are ready to make a purchase, the information here is up to date and accurate.

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Features

#1 Gree 9,000 BTU 38 SEER SAPPHIRE Wall Mount Heat Pump

  • 13,000 BTU Cooling and Heating Capacity
  • 38 SEER and 15 HSPF
  • Energy Star Certified
  • 5 Year Compressor & Parts Warranty
  • Warranty is 10 Years When Installed by a Gree Dealer

Highest SEER Overall

#2 Mitsubishi 9,000 BTU 24.6 Seer Single Zone Ductless (AC and Heat)

  • 9,000 BTU Cooling and 10,900 BTU Heating Capacity
  • 24.6 SEER and 12.8 HSPF
  • Wall Mount Indoor Unit
  • Energy Star Certified
  • 7 Year Compressor and 5 Year Parts Warranty

Best for Tiny House – 9K BTU

#3 PIONEER WYS009GMFI22RL Mini Split Heat Pump

  • 9,000 BTU Cooling and 9,800 BTU Heating Capacity
  • 22.8 SEER and 10.5 HSPF
  • Auto energy-saving mode when in standby
  • 3 Year Compressor and 1 Year Parts Warranty
  • Select for 12K & 24K BTU Sizes

Value Priced High SEER 9K BTU

#4 Daikin 9,000 BTU 20 SEER Low Ambient Ductless Heat Pump

  • 9,000 BTU Cooling and 10,900 BTU Heating Capacity
  • 20 SEER and 12.5 HSPF
  • Energy Star Certified
  • 12,000 BTU Size Available
  • 12 Year Warranty with online registration

Best Warranty 9K BTU

#5 Gree 12,000 BTU 30.5 SEER SAPPHIRE Wall Mount Heat Pump

  • 12,000 BTU Cooling and 12,200 BTU Heating Capacity
  • 30.5 SEER and 14 HSPF
  • Energy Star Rated
  • 5 Year Compressor & Parts Warranty
  • Warranty is 10 Years When Installed by a Gree Dealer

Highest SEER 12K BTU

#6 MrCool 3rd Generation DIY 12k BTU 22 SEER Heat Pump

  • 12,000 BTU Cooling and Heating Capacity
  • 22 SEER and 10 HSPF
  • Easy DIY Installation
  • Energy Star for Heating & AC
  • 7 Year Compressor and 5 Year Parts Warranty

Highest SEER DIY 12K BTU Heating

#7 Senville SENA-18HF/D Dual Zone Heat Pump 22.5 SEER

  • 18,000 BTU Cooling and 19,000 Heating Capacity
  • 22.5 SEER and 10.3 HSPF
  • Energy Star Certified
  • Can Heat in -22F Outdoor Temperature
  • 7 Year Compressor and 7 Year Parts Warranty

Dual Zone for 1000 Square Foot

#8 Senville 28,000 BTU Tri Zone Mini Split Heat Pump SENA-30HF/T

  • 28,000 BTU Cooling and Heating Capacity
  • 23 SEER and 10.5 HSPF
  • Energy Star Certified
  • Low-temperature Heating to -22F Outdoors
  • 7 Year Compressor, 3 Year Parts Warranty

Best Triple Zone High SEER

Most Efficient Mini Split Reviews

Here are the complete reviews of the most efficient ductless heat pump systems.

#1 Gree 9,000 BTU 38 SEER SAPPHIRE Wall Mount Ductless Mini Split Air Conditioner Heat Pump 208/230V

Highest SEER Overall

Features:

  • Super-efficient G-10 Inverter technology
  • Whisper Quiet operation
  • 7 Speed fan
  • Intelligent preheating

Pros:

  • 2-stage compressor for cooling and heating in extreme temperatures
  • WiFi ready with the Gree+ app
  • Mounting bracket available

Cons:

  • Line set (refrigerant lines) not included
  • Installation by a licensed technician is required

In Our View:

This ultra-high efficiency 9,000 BTU heat pump is one of the highest SEER mini split heat pumps in the industry.

From their beginning in 1991, GREE has grown to a company with over 80,000 employees across the world with 3 research institutes and 9 product development centers. They were chosen to provide the air conditioning for the 2008 Beijing Olympic Games Media Village and the main stadium of the 2010 Africa World Cup.

#2 Mitsubishi 9,000 Btu 24.6 Seer Single Zone Ductless Mini Split Heat Pump System (AC and Heat)

Best for Tiny House – 9K BTU

Features:

  • Multi-mode remote including Econo-Cool, Hot-Start and Dehumidify
  • Auto mode selects the best vane position based on operating mode
  • Smart Set function allows you to save temperature, fan speed, and airflow direction

Pros:

  • Quality equipment from a globally-known manufacturer
  • Popular for tiny house installation too

Cons:

  • Line set and other installation parts not included
  • Warranty only valid if installed by licensed HVAC technician

In Our View:

A company like Mitsubishi that has been building Mini splits for over 50 years has learned how to do it right. The fact that this 9K unit is among the most energy efficient on the market today means you can keep your home comfortable while keeping your energy bill down. Mitsubishi also makes a little 6K unit with a 33.1 SEER that would be great for a tiny house, bedroom, room addition or insulated garage.

#3 PIONEER WYS009GMFI22RL Mini Split Heat Pump, 9000 BTU-208/230 V, White

Value Priced High SEER 9K BTU

Features:

  • Large LCD backlit display, multi-function wireless infrared remote controller
  • Automatic swing air discharge louvers and permanent washable air filters
  • Multi speed fan motor with whisper quiet operation

Pros:

  • Complete 16 foot installation kit is included
  • Professional, courteous and prompt Customer Service
  • Best for 400 square foot house

Cons:

  • Installation instructions could be much clearer
  • Flares on copper line sets leave something to be desired

In Our View:

Produced by Parker Davis HVAC International, Inc., the Pioneer brand of ductless mini splits cover all the bases with units available from 9,000 to 48,000 BTU compressors and 5 different indoor air handlers. The WYS line, which this unit is part of, boasts their highest SEER. This little 9K model will deliver reliable cooling and heating at a price that comes in lower than many of its competitors.

#4 Daikin 9,000 BTU 20 SEER Low Ambient Ductless Mini-Split Inverter Air Conditioner Heat Pump System Installation Kit and Wall Mounting Bracket (230 Volt)

Best Warranty 9K BTU

Features:

  • Program Dry Function to dehumidify without changing temperature
  • Comfort Mode to direct warm air downward when heating
  • Hot Start for no cold drafts on startup
  • WiFi ready with the Daikin Comfort Control app on your phone

Pros:

  • Specially designed for cold climate conditions
  • Full installation kit and mounting bracket included

Cons:

  • Remote temperature setting not accurate

In Our View:

Daikin is a global innovator and provider of advanced air conditioning solutions for residential, commercial and industrial applications. They now market their products in 150 countries. This Aurora Series 9,000 BTU Low Ambient model could be just what you need for cooling, and for heating a room in your house in a cold climate.

#5 Gree 12,000 BTU 30.5 SEER SAPPHIRE Wall Mount Ductless Mini Split Air Conditioner Heat Pump 208/230V

Highest SEER 12K BTU

Features:

  • Heating, Cooling, Dry, and Fan modes
  • Low voltage start-up and Intelligent defrost
  • WiFi Ready with the Gree+ app
  • 4-way air flow and whisper quiet indoor unit

Pros:

  • IR remote control included
  • 7 Speed Fan for perfect air control 

Cons:

  • Installation kit not included
  • Installation by a licensed technician is required

In Our View:

This 12K model is another in the Gree Sapphire line, and is an ultra-high-efficiency ductless mini split system. It’s not only a great A/C, but it will also deliver up to 90% heating capacity even in extreme cold down to -22 F. It is the highest SEER of the 12K units we know of today.

#6 MrCool DIY 12k BTU 22 SEER Ductless Heat Pump Split System 3rd Generation – Energy Star 120V with Line Set Cover & IR WiFi Thermostat

Highest SEER DIY 12K BTU for Heating

Features:

  • Follow Me IR Remote for personalized comfort
  • Auto Restart after power outage
  • Sleep, Fan and Turbo Modes

Pros:

  • Complete DIY Installation kit included – even line set covers
  • WiFi Smart Kit included
  • Best for 600 square foot house or large zone

Cons:

  • Follow the directions carefully for best results – most “cons” are due to faulty installation

In Our View:

MRCOOL has become a leader – if not THE leader – in DIY ductless mini splits. With units ranging from 9,000 to 48,000 BTU, and from 1 to 5 zones with many different configurations, just about any home’s needs can be met with one of these fine products. This 12K model is no exception and would be great for cooling and heating up to 500 square feet of space.

#7 Senville SENA-18HF/D Dual Zone Mini Split Air Conditioner Energy Star Cold-Climate Heat Pump 22.5 SEER, 18,000 BTU

Best Triple Zone High SEER

Features:

  • Wi-Fi enabled
  • LED Remote with 9 function buttons and built in thermostat
  • Diagnostics & Leak Detection System
  • Two Wall Mount Indoor air handlers (9,000 BTU Each)

Pros:

  • Energy Star and AHRI Certified
  • Very quiet when running

Cons:

  • Instructions are a little hard to understand

In Our View:

This Senville Dual Zone ductless mini split uses Inverter technology in its compressor to deliver Ultra High Efficiency and Performance. Having the complete installation kit included means no extra trips to the hardware store. If you’re looking for a great ductless unit for 2 separate rooms – especially if you live in a cold climate – this might be the one for you.

#8 Senville 28,000 BTU Tri Zone Mini Split Air Conditioner Heat Pump SENA-30HF/T

Dual Zone Best for 1000 Square Foot House

Features:

  • Turbo Mode, Ionizing Air Filter, Dehumidification, Timer Function, Follow Me Function
  • Whisper Technology for quiet operation
  • Three 9,000 BTU air handlers for custom temperature settings in three different spaces
  • Vertical swing function for even distribution of air

Pros:

  • Energy Star Certified, AHRI Certified
  • Great value for the money
  • Best for 1000 square foot house

Cons:

  • All three units must operate simultaneously

In Our View:

The Senville brand has been steadily gaining in popularity with people looking for high quality at an affordable price. With 88% of purchasers giving this model 4 or 5 stars and one of the highest SEER ratings, this three zone mini split ranks very high in our opinion.

Mini Split SEER Rating

What is SEER and why does it matter?

SEER is an acronym for Seasonal Energy Efficiency Rating. It is a measurement of how much cooling a unit will put out compared to how much energy is put in. Think of it as MPG or Miles Per Gallon. The more MPG your vehicle gets, the less you will spend on fuel to go a certain distance. The higher the SEER of a mini split, the less money you will spend to cool your home to a certain temperature.

The minimum SEER for a mini split that is mandated by the federal government is currently 14, but this will go up to 15 in 2023 according to the U.S. Energy Information.

To get a basic idea of how much difference a higher SEER makes over a lower SEER of 16, here is a chart to look at.

So, as you can see, you can enjoy a pretty good reduction of your energy bill each month by choosing a ductless mini split with a high SEER. For example, by installing a unit with a SEER of 25, you will save about 36% each month over what you would owe the electric company if you had a SEER 16 unit. You would save even more over a minimum SEER 14 unit.

Here is an article that goes into much more detail about SEER and how to calculate your possible savings – as well as what your payback time might be on the price of a high SEER model.

Most Efficient Mini Split FAQ’s

What is a good SEER rating for a mini split?

A good SEER rating is 20 or above. The most efficient SEER ratings start at about 30 SEER. If your climate is extreme, especially if your summers are very long and hot, then consider a mini split with a SEER rating of at least 20, and one that is 30 SEER or higher will definitely help you control energy costs.

What is the highest seer mini split?

The model with the highest SEER we know of at this time is the Carrier 42 SEER mini split made by Midea’s brand Toshiba. Where to buy the Carrier 42 SEER mini split?

You can learn more about the Infinity Series Carrier 42 SEER mini split in our full Carrier Mini Split Systems Review.

What are the mini split highest seer ratings with products?

Here are the current most efficient mini split systems, aka ductless heat pumps.

Seer Saving
(Compared with 16 seer)
Recommend Product
30 Seer47%Gree 30.5 SEER SAPPHIRE Wall Mount Mini Split
33 Seer52%Mitsubishi MSZ-FS Deluxe Wall-mounted Indoor Unit   Fujitsu Halcyon Mini-Split Systems RLS3Y Series
38 Seer58%Gree 38 SEER SAPPHIRE Wall Mount Ductless Mini Split
40 Seer60%Carrier Midea 40 SEER CMNA Hyper Heat Ductless Split
42 Seer62%Carrier Mini-Split Infinity Series

I’m considering a ductless mini split heat pump for a 2,500 square foot house. How should I decide what size model to buy? 

This is one of the most important questions that you should ask when thinking about any HVAC unit. Choosing the right size (in BTU’s) for your house is important because if the unit is too small, it may not be able to attain the temperature that you call for on the thermostat. This would be true for both cooling and heating.

On the other hand, if the unit is too large, you might not experience any problems during the heating season, but during the hot months, you could have what is known as, “short cycling”. This is what happens when a large a/c unit cools the living space down so quickly that the moisture is not removed from the air as it normally should be. You will have a room that is very cool, but also too humid.

So, you have already measured your house, and you will want a multi zone mini split, since you have several rooms or spaces in your house that will each need a separate indoor unit. The part of the country (USA) that you live in, the amount of insulation in your house, and even the sun exposure can make a difference as well. How to determine what size unit is next.

Here is the Pick HVAC BTU calculator to help you determine the correct size mini split for your needs.

So, using this calculator, let’s create a scenario where you live in the middle of the country – let’s say zone 4 – and your 2,500 square foot home has average insulation and average sun exposure. Put the information into the calculator, and you will see that you need a mini split heat pump which has a BTU rating of between 40,000 and 50,000 BTUs. Since many manufacturers make units that are 42,000, 45,000 or 48,000 BTU, you will be able to find one that is right for you.

It’s up to you to decide how many zones you would want, but there are units in this BTU range that have between 3 to 8 separate zones, with indoor units available between 6K and 15K BTUs. The options really are plentiful.

One final word, since this article is about mini splits with the highest SEER. It is generally true that the mini splits with the highest efficiency rating (SEER) are the smaller ones. As the BTU capacities go up, the SEER usually tends to go down. For this reason – if you have a choice – you will usually be wise to choose a unit that is toward the smaller side of a BTU range rather than the larger side.

Written by

Rene has worked 10 years in the HVAC field and now is the Senior Comfort Specialist for PICKHVAC. He holds an HVAC associate degree from Lone Star College and EPA & R-410A Certifications.
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