Oversized AC Unit Risks: Humidity and Lifespan

In part one of this two-part blog series, we went over some basics on why an oversized AC unit in your home or building is a problem. While some might assume that a larger unit will just cool faster and more efficiently, this isn’t always the case – a properly-sized unit will indeed cool efficiently, but one that’s too large will do the opposite, and cost more in the process.

At My Buddy the Plumber, we’re happy to help with a wide range of air conditioner services, including AC replacement and installation services where the size of your unit is a major consideration for our professionals. What are a couple of the other risks associated with an oversized AC unit, and how will quality HVAC professionals help you avoid these risks altogether? Here’s a quick primer.

oversized AC unit humidity lifespan

High Humidity

We went over a few of the discomfort issues an oversized unit might create in part one, but humidity deserves its own mention here. Some don’t realize it, but an additional role of the air conditioner during standard operation is to remove humidity from the air while it cools, keeping both your temperature and your moisture levels at the ideal range.

But with an oversized unit, which short-cycles and doesn’t run for long enough (as discussed in part one), there won’t be enough time for all the humidity to be removed properly. Not only will your home be stuffier because of this, you’ll also be at greater risk of mold growth, including within your air ducts and your resulting air supply.

Lifespan Issues

And finally, an oversized unit simply won’t last as long as one that’s properly-sized. The short-cycling we discussed earlier means quicker bursts of power are needed from the unit, which over time will strain it and its interior components. Oversized units often last for 25% or even 30% shorter lifespans than those that are sized optimally.

Professional Installation to Avoid Oversizing

As you may have already guessed from reading up to this point, there’s one very simple way to avoid any of these risks: Ensure a properly-sized AC unit is installed the next time you’re upgrading or replacing your unit. And for those without major HVAC training, a vital key here involves working with quality heating and air specialists for these and related needs.

Our HVAC technicians have installed numerous outdoor AC units in the past, and are trained with specific techniques to gauge the size of your home and determine the corresponding AC unit size. When we perform your installation, oversizing of the unit is not a concern whatsoever.

For more on the issues with an air conditioning unit that’s too large, or to learn about any of our HVAC or plumbing services, speak to the staff at My Buddy the Plumber in Park City today.