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5 Problems Caused by an Incorrectly Sized AC Unit

AC Unit
A common misconception is that a bigger air conditioning (AC) unit will cool your house better and faster. However, size does not affect the speed with which an AC cools your home. Factors such as the size of your home, your area's climatic condition, the level of insulation, and the nature of ductwork will determine the size of your air conditioner.

An AC unit that is too large or even too small can end up creating a host of problems, potentially requiring you to replace the unit with one that is suitable for your home. Read on to learn more about the effects of a wrongly sized AC.

1. Short Cycling

Ideally, an AC unit should run a complete cycle that is long enough to cool your entire home evenly. However, an AC unit that is too large for your home will run for very short cycles before switching off and then back on.

Your house may feel cooler within a short period but the short cycles mean that the AC cools only some parts, leaving other areas in your house feeling uncomfortably hot.

2. Short Service Life 

Short cycling can reduce the lifespan of an oversized HVAC system, necessitating potentially costly repairs or replacement. At the same time, a unit that is too small for your home will need to run longer, which can result in premature wear and tear.

Unfortunately, to resolve many of the problems related to large AC units you would need to replace the unit, which can be a potentially costly affair.

3. Energy Wastage 

A wrongly sized AC unit is inefficient, will lead to unnecessary energy consumption, and can drastically increase your energy bill.

Your AC could hog energy in several ways. For example, an oversized AC will expend a disproportionately large amount of energy to cool a home that is too small for the powerful AC unit.

On the other hand, an HVAC system that is too small for your home would need to run for longer to cool the space. The harder the system works to lower the temperatures, the higher the energy consumption, which results in higher energy bills.

If replacing your small AC unit is not feasible, consider installing several fans to help cool your space better.

You could also try setting your thermostat at a reasonable temperature so that the unit will not have to work excessively to bring the temperature down to a comfortable level.

4. High Moisture Content 

In addition to maintaining comfortable temperatures, your HVAC also works to regulate the amount of humidity in your home.

Humidity levels higher than 60% can result in a host of problems. Excessive moisture promotes the growth of mold and mildew, which is not only an eyesore but can cause health problems and allergies too.

Excessive moisture is often a problem associated with an oversized HVAC system. An overly large system tends to cool the house too fast to adequately remove the humidity in the air, leaving too much moisture in the house.

A dehumidifier can help minimize the moisture content in the house. However, your HVAC contractor may recommend repairing or replacing the system as a long-term solution.

5. Excessive Dust 

Replacing a small AC unit with an oversized one without adjusting the ductwork can be problematic. One of these problems is that the HVAC system pulls excessive dust and debris into the house through the ductwork. 

Ductwork repair can be costly and may not always be feasible. In this case, replacing an oversized AC unit with one that is the right size is probably the best option.

Whether you are in the market for an HVAC system or you are already experiencing these problems, speak to the home comfort experts at KLEEN AIR. Let us help you select and install the right HVAC system for your needs.