Since most air conditioners do not last forever, there will come a time when you need to replace the one in your home. However, before you simply go out and buy a new one, you need to know how big the unit should be. By taking this opportunity to understand a few aspects about sizing options, you will have a much easier time picking the best model for your home.
Unit is Too Big
When your air conditioner is too big for your home, it will not function ideally for the allotted space. With this in mind, it is important to know how many BTUs (British thermal units) the air conditioner needs to use each hour to cool your home. When the air conditioner is too large for the space, it uses a lot more energy, which increases your monthly electric bills.
Aside from the monthly energy consumption, a larger unit may not remove enough humidity from your home. As the unit cools the air, it removes moisture as the air travels through the evaporator coils of the system. This excess water is what you see coming out of the exterior drain line of your home's current HVAC system.
The lack of moisture removal happens when the unit runs shorter cycles that cool down your home too quickly. The cycle does not run long enough to pull the humidity out of your home and it can make the air feel thick or sticky, which is why a bigger unit may not be the best option for your home.
Unit is Too Small
On the other hand, a unit that is too small for your home will also cause you to have some problems as well. For example, the system will run longer cycles to keep your home cool. The problem with this is that the unit will use a lot more energy and increase your monthly electrical bills. Even though the smaller unit may be more affordable to purchase upfront, you have to consider how much money it will cost to run the unit on a monthly basis.
Another problem is that the extended cycles overwork each portion of your air conditioner. When the unit does not have time to shut off for a while, then different areas of the system just wear out. External fans, the compressor and the electrical wiring for example, all need some time to recover slightly after each cycle.
Therefore, when it is time to replace your current air conditioner, it is a good idea to research sizes that would work for your home. If you have any concerns, an HVAC company (such as Central Aire Conditioning) can help you better understand the different models that will work for your home.