Most traditional AC units and older models of air conditioners work with quite a lot of noise. Ductless split system air conditioners on the other hand are known for their quiet operation, thanks to their design. The placement of the parts outdoors also ensures that whatever vibrations and noise that takes place stays outside. This article is dedicated to reviewing the quietest ductless split system air conditioners on the market in 2025 so you can make the best choice.
In a hurry? This is a spoiler for you. Top on our list of quietest split system AC is the Senville quiet mini split AC heat pump. Its energy-efficient has a built-in heat pump as well and works super quietly. The Gree 12,000 BTU Sapphire Wall-Mount Ductless Split Air Conditioner is next on our list. It’s virtually silent, can be controlled using your smartphone, and can cool larger even rooms. Kilmaire 12,000 BTU Ductless Mini Split Air Conditioner Heat Pump comes with its installation kits and accessories and has high BTU and SEER ratings so it is very efficient.
Quietest Split System AC: Quick Comparison
BEST RATED  |
Senville SENL-09CD Quiet Mini Split AC
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RUNNER UP  |
Gree 12,000 BTU Sapphire Wall-Mount Ductless Split Air Conditioner
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Kilmaire 12,000 BTU Ductless Mini Split Air Conditioner
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Pioneer Air Conditioner WYS018G-19
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Thermocore Inverter 12,000 BTU
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Quiet Ductless Air Conditioner 2025: Reviews
1. Senville SENL-09CD Quiet Mini Split Air Conditioner and Heat Pump
Best Quiet Mini Split AC
First on our list of quiet ductless air conditioners is the Senville SENL-09CD Quiet Mini Split AC.
It’s an energy-efficient AC unit that also gives you a whisper-quiet operation, at only 25 decibels.
This doesn’t mean what you get would be anything below perfect as it’s made to perform wonderfully even in the harshest weather conditions.
It has a sleek design that is a perfect fit for any part of your home as it adds to the beauty of your room.
Thanks to the built-in heat pump, you would benefit from the AC during the cold winter months and the hot summer season as well.
Maintenance is easy too, and thus so thanks to the easily washable and replaceable filter.
Pros
- Built-in heat pump for the cold winter months
- Low noise level of 25 decibels
- Sleek design
- Easily washable and replaceable filter
- Energy efficient
Cons
- Needs professional installation unless you’re very DIY savy
2. Gree 12,000 BTU Sapphire Wall-Mount Ductless Split Air Conditioner
Second Best Split AC Unit
The Sapphire ductless split air conditioner makes it easy for you to gain control with its backlit display and indicator lights.
So you can know the current operating mode, and change it to your desired setting easily.
With up to 38 SEER and 12,000 BTU rating, this air conditioner can cool 650 sq. ft. rooms properly.
This is at a whisper-quiet noise level of only 19 decibels.
You also benefit from its ultra-heating technology to keep you warm when the temperature drops.
There is a power failure mode and also 7 fan speeds to choose from according to your needs.
You can utilize Wi-Fi technology to control your AC from the comfort of your smartphone using the Gree+ app.
Pros
- 12,000 BTU rating
- Up to 38 SEER
- 7 fan speeds available
- Wi-Fi technology makes it easy to operate the unit from your smartphone
- Can cool a room of size 650 sq. ft.
- Low noise level of 19 decibels
Cons
- Not the easiest individual AC to install
3. Kilmaire 12,000 BTU Ductless Mini Split Air Conditioner Heat Pump
Ultra Quiet AC
Kilmaire is one of the most efficient and silent air conditioners on the market in 2025.
Operating at only 25 decibels, you will barely hear any sound from it, but you will feel it in operation as it goes all out to keep your room warm.
Thanks to the 12,000 BTU rating, and 19 SEER, you would get nothing less than great performance.
Every purchase comes with an outdoor unit, indoor unit, remote control, and other installation kits and accessories to enable easy installation.
There are a built-in base pan and compressor heater to help improve the efficiency and reliability of the unit.
The auto-clean function ensures that your air conditioner is fresh and ready for the next operation by drying off the evaporator.
You also have a 5-year compressor warranty from the manufacturer.
Pros
- Ultra-quiet operation at 25 dB(A)
- 5-year compressor warranty
- 19 SEER
- 12,000 BTU rating
- Comes with installation kits and accessories
Cons
- Not the easiest to install and may require professional assistance
4. Pioneer Air Conditioner WYS018G-19
With a very low noise level that is hard to notice, this Pioneer split system air conditioner is one of the quietest ductless split system air conditioners you will lay your hands on.
With 18,000 BTU and 19 SEER, it gives you enough power to efficiently cool your room whether medium-sized or large.
You also save more with a single purchase as it serves as a quiet ductless mini-split air conditioner and heat pump.
The ductless indoor section is made of a flat front panel with an LED display. This allows you to see the setting and guides you as you make changes.
You can also set the louvers to swing, change the fan speed, and wash the air filters easily. The remote controller also has an LED-backlit display to enable seamless control.
An outdoor section is also a quiet unit, and it’s very durable. Every purchase comes with a complete installation kit to make the installation easier.
Pros
- Quiet ductless mini-split air conditioner and heat pump
- Comes with an installation kit
- Works silently
- 5-year warranty
- 18,000 BTU
- 19 SEER
Cons
- Both indoor and outdoor fans run continuously
5. Thermocore Inverter 12,000 BTU
Last but not least on our review of the quietest ductless split system air conditioner is this Thermocore inverter.
Its crossflow technology greatly reduces the noise it produces when working so that you can have your room cool, and still get the perfect rest.
At 16 SEER, and 12,000 BTU, you are sure of the best performance from this unit.
The two-direction air vane distributes air evenly so that every part of the room gets cool rapidly and equally fast.
For more control, you get a digital multi-function LCD remote, so that you can switch modes and change settings from the comfort of your bed, or chair as the case may be.
Unlike some other units, this unit can be used in ambient temperatures that are as low as 5F.
Pros
- Low noise thanks to the noise-reducing design
- Can operate in ambient temperatures down to 5F
- Evenly distributes air with two direction air vane
- 12,000 BTU
- 16 SEER
- Remote control included
Cons
- Can’t be used for smaller rooms
Read also: best quiet wall air conditioner and quietest portable AC on the market
Final Words About the Best Silent Split System Air Conditioners
Split AC units are usually the quietest types of air conditioners, but with the large number of aircons you can see on the market, it can be difficult to make a choice.
Senville SENL-09CD Quiet Mini Split Air Conditioner is the best rated one in 2025. The Gree 12,000 BTU Sapphire Wall-Mount Ductless Split AC can be used for larger rooms, and it gives you more control.
Another great choice is the Kilmaire 12,000 BTU Ductless Mini Split Air Conditioner Heat Pump. It has an auto-clean feature and is one of the most efficient and ultra-quiet units you will find.
Dave Pearson is a Canadian musician, sound editor, and audiophile. He is also the founder and owner of the website SoundProofGeek. On SoundProofGeek, Pearson offers advice and resources on audio equipment, including how to assess and improve audio quality, how to troubleshoot and repair audio equipment, and how to improve the music listening experience.
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