Ductless Air Conditioners Noise Levels

January 8, 2009 by Shawn Mack  
Filed under Technical Guide

“Split systems, or ductless mini splits as they have been know to be called, are very quiet air conditioners.”

How loud is a ductless air conditioner? Many consumers ask this question when shopping for an air conditioner for their home or office. Comfort while sleeping is very important in my life. A quiet dark room at a comfortable 70° F always does the trick for me. Most air conditioners on the market will get me to a comfortable temperature but what style will do the job with the least amount of noise?

Air conditioner manufacturers measure the amount of noise a unit makes in decibels (dB). A decibel is a logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power or intensity) relative to a specified or implied reference level. In lemans terms how loud something is.

For the purpose of comparing air conditioners let’s break them down into two categories: packaged air conditioners and split system air conditioner.

A packaged air conditioner would consist of any system that has both the evaporator and condenser in one cased unit such as a window unit or packaged air conditioner (PTAC). Packaged unit will always be louder than a split system air conditioner because the compressor and other loud working components are protruding into your living environment.

Not only are packaged air conditioners louder than split systems, window air conditioners usually have minimum insulation and sound proofing between the unit and the window casing. Outdoor noises in combination with a loud window air conditioner definitely will decrease sleep.

Most window unit air conditioners and PTACs have an average decibel level of 48 to 60 dB. If you can afford a little more money I would recommend a split system air conditioner in your bedroom.

Split system air conditioners get their name from having two separate main components: the outdoor condenser and the indoor evaporator. Split systems, or ductless mini splits as they have been know to be called, are very quiet air conditioners.

The compressor and other loud working components are stored in the outdoor unit and the indoor unit is just used to expel the cool or hot air. If you would like to generate heat, as well as air conditioning, look to purchase a heat pump mini split. Mini split evaporators, on average, produce about 32 decibels. The condenser and evaporator are connected with a refrigerant line set that runs through a 3” hole in the wall.

Ductless mini split air conditioners are the ideal solution to older louder air conditioners.

Ductless air conditioners have come a long way in minimizing decibel noise over the past five years. If your existing air conditioner is more than 10 years old you will be surprised by the minimum amount of noise the new equipment creates.

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