What Makes An AC Unit Efficient?

Posted on: 10 May 2016

As a homeowner, the more money you can save on routine costs, the more money you have available to do the things you love. Cooling bills are one of the largest costs that a homeowner has to contend with. So learning to recognize the components of a highly efficient air conditioner will help you to select a unit that will save you money.

Larger Coils

An AC unit uses a set of evaporator coils to cool the air in your home and a set of condenser coils to cool the refrigerant running through them so that it is ready to cycle back to your home and provide more cooling. Simply said, larger coils have a greater surface area so that evaporator coils can cool a larger volume of air and condenser coils can more quickly and efficiently cool the refrigerant. Thus, the larger condenser coils outside your home are worth dealing with. 

Multi-stage Motors

Older AC units will have one-stage motors to run their fans. This means that your AC unit can only run at one speed: full blast. While this set-up will provide rapid cooling for your home, it also uses a lot of electricity. A highly efficient unit will have a multi-stage motor to match the speed of the fan to the demand for cool air in your home. By running at a lower speed when there is less need for cooling, the motor will use less electricity and save you money. 

Two Compressors

Another component of your AC unit that uses a lot of electricity is the compressor. Less efficient models will have one compressor, which again means that your unit can only run at one capacity. A highly efficient AC unit will have two compressors, and one will be larger than the other. When the demand for cooling is small, the unit will use the smaller compressor; as the demand increases, it will switch to the second; and when the demand is greatest, it will use both compressors. Using the smaller compressors will help your unit to save money when cooling during off-peak hours. 

Recognizing the need to more efficiently use electricity, AC manufacturers are always coming up with new ways to improve the efficiency of the models they sell. Whether you are replacing an older unit or choosing air conditioning installation for a new home, a highly efficient AC unit will cost you more initially, but they will help you to save money down the road. 


Working with an HVAC Contractor to Care for Your System

As a homeowner, you know how important your HVAC system is for comfort throughout the year. If the air conditioner or heater is not working properly, it can result in higher energy costs as the system struggles to keep your home temperatures in a comfortable range. Working with an HVAC contractor will help you maintain your system for reliable use long term, and possibly help you cut your power bills enough to notice the savings at the end of the year. Check out the pages on this website to learn more about how to find the perfect HVAC contractor to work with and how you can be of assistance to them when it comes to keeping your system in tip-top shape.