Two Stage AC and Variable Speed AC

Two Stage AC and Variable Speed AC

Two stage AC and variable speed AC are very different from each other.  To help explain the differences let us start with what a one stage AC is. A one stage compressor is either entirely on or 100% off. In contrast, a two-stage air conditioner has a compressor that can operate at two distinct speeds. A variable speed AC on the other hand operates across a capacity range. In this article we will go more in depth about the differences and benefits between these systems.

Two-Stage AC System

A two stage compressor sometimes called a dual-stage compressor is somewhere between single stage and variable speed system. Its output varies somewhat unlike that of a single stage, but not as much as a variable speed. A two stage AC runs at full capacity when you need it to, or at a lower level when you do not. While it varies depending on the AC model, the second stage is typically around 70% capacity. Two stage systems do not run as continuously as variable speed systems, but they cycle on and off less frequently than single stage systems. This leads to less energy use and prevents the need from turning the system on and off to full capacity so often.

Two Stage AC: Pros and Cons

If you are comparing systems because you are in the process of AC replacement keep in mind a two stage AC is going to provide more efficiency compared to a single stage air conditioner and will help you save on energy costs. Depending on the model and brand, two stage systems offer value than the higher upfront cost of a variable speed system. However, although two stage systems are adequate they are not the most efficient or most flexible option. With a two stage system you do not get as many options as with a variable speed AC.

Variable Speed AC

A variable speed AC can have up to 700 distinct compressor settings that correspond to varying airflow levels. The different settings allow for your AC to run only on as much power as it needs to maintain a consistent temperature in your home.  By doing so, a variable speed AC will result in even cooling throughout the home to maintain desired temperature and provide effective dehumidification leading to higher indoor air quality. These systems rarely turn off, but instead operate below 100% capacity for long periods while varying speed. Since it does not power on and off like one and two stage systems, it provides substantial energy savings and allows for a longer lifespan.

Variable Speed AC: Pros and Cons

Variable speed air conditioning systems run the most efficiently and therefore offer the most savings on energy costs. Due to its continuous operation at lower speeds, they run quieter and provide better control over home temperature and dehumidification. In other words, your home will be more consistently comfortable. However, the high initial AC replacement price of a variable speed air conditioning system is a drawback for many. They also have more costly replacement parts for AC repair. The higher price is worth it if your plan is to live in the home long – term. The system will pay for itself over the years by saving you money on energy bills.

Contact LA Construction, Heating and Air

Give us a call today or contact us online. We can help you decide which system is best for you based on your lifestyle and budget. We offer free consultations on AC replacement. Our other services include AC repair, HVAC maintenance. Schedule an appointment by contacting us today, we are here to help you.

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