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HVAC, Inspection FAQ

What’s the problem with an oversized A/C system?

Here are a few of the problems.

 

An oversized condenser or compressor can lead to a few potential problems:
1. Reduced efficiency: An oversized condenser or compressor may not operate at its optimal efficiency, which can lead to higher energy consumption and increased operating costs.
2. Short cycling: An oversized compressor may cause the system to short cycle, which means it turns on and off frequently. This can lead to premature wear and tear on the equipment and reduce its lifespan.
3. Humidity issues: An oversized air conditioning system may not run long enough to remove the desired amount of moisture from the air, leading to high humidity levels and potential mold or mildew growth.
4. Increased noise: An oversized compressor may create more noise than necessary, which can be disruptive to occupants of the building.
5. Higher initial cost: An oversized system may have a higher upfront cost, which may not be necessary if a properly sized system would meet the cooling needs of the space.


Why do some people install oversized A/C’s?

 

There are a few reasons why someone might oversize their air conditioning system:
1. Lack of knowledge or improper sizing calculation: HVAC systems are complex, and it can be challenging to determine the correct size for a system based on a building’s square footage, insulation, and other factors. If someone does not have the appropriate knowledge or makes an error in the sizing calculation, they may oversize the system unintentionally.
2. Desire for quick temperature change: Some people may believe that an oversized system will cool a space more quickly than a properly sized system. While an oversized system may cool a space more quickly initially, it will not maintain a consistent temperature and may lead to the problems mentioned earlier.
3. Future expansion or changes: Someone may choose to oversize their system to accommodate future expansion or changes to the building. However, it is generally better to install a system that meets current needs and plan for future changes or expansions with a separate system or equipment upgrade.
4. Personal preference: Finally, some people may simply prefer a larger system and believe that it will provide better comfort and cooling. However, this is not necessarily the case, and an oversized system can lead to the problems mentioned earlier.
Oversized A/C Condenser

Oversized A/C on a Small House

May 5, 2023/by jboudoin
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