FAQs

For most people, how air conditioners work seems like magic. They may not understand the mechanics behind HVAC systems, but they sure appreciate the comfort these devices provide in their homes and offices.

According to the U.S. Department of Energy, 75% of U.S. homes have air conditioners, which use around 6% of the nation’s total energy. Homeowners spend about $29 billion annually on energy costs related to maintaining indoor temperatures.

Air conditioners operate by using refrigeration principles. They extract heat from inside the home and release it outside. The cooled air is then circulated by a fan through ducts.

Heating and cooling units are built to last, typically running for several hours a day with a lifespan of 15 years or more. Considering their exposure to various weather conditions and their workload, that’s quite impressive.

When air conditioners break down, homeowners start wondering how these often-overlooked devices function. Here are some common questions about HVAC systems:

How often should I change my air filters?

A good rule of thumb is to change them once a month. However, depending on factors like dirt, pet dander, and air contaminants in your area, you may need to check more frequently. If the filter looks dirty, it’s time to replace it.

What size unit do I need?

There’s no simple answer. Factors like the type of home, insulation, and attic space affect the size of the HVAC unit needed. A system that’s too large can make your home humid and prone to mold, while a small unit will overwork and increase energy costs. A qualified HVAC technician can determine the right size for your home.

Do I need to replace my indoor unit when replacing the outdoor one?

In most cases, yes. Outdoor air conditioning units are designed to work with a matching indoor unit. Mismatched units can reduce efficiency and performance. If both units were installed at the same time, the indoor unit might also be nearing the end of its lifespan. Replacing them together will also provide a warranty that covers the whole system.

Should I cover my AC unit in the fall and winter?

While covering the unit can keep debris out, operating it with the cover on can cause problems. If you plan to turn it off during a long trip, you can cover it, but make sure to disconnect the power before doing so.

Why should I replace my R-22 unit with an R410A?

R-22 refrigerants and equipment are being phased out due to regulations under the Montreal Protocol, which aims to protect the ozone layer. As a result, replacement parts and refrigerants for R-22 units are becoming more expensive and harder to find. Upgrading now can save you from future headaches.

What causes an AC unit to freeze up?

Freezing can occur for various reasons, all of which require a professional to resolve. Low refrigerant levels, caused by leaks, can lower system pressure and lead to freezing. Dirty evaporator coils and malfunctioning blower motors can also contribute to freezing issues.

How often should I have my HVAC unit serviced?

Experts recommend an annual inspection. Technicians will check for issues, lubricate components, and repair or replace any malfunctioning parts.
Why do my ducts make a popping sound when the furnace starts or stops?

This noise usually indicates that the ducts are too small to handle the airflow. A qualified technician can evaluate your ductwork and make necessary adjustments.

What is a zoning system?

Zoning systems divide the ductwork into segments, allowing you to control the temperature in different parts of your home. For instance, you can direct more cool air to a sun-exposed room while reducing airflow to an unused guest room, improving efficiency and comfort.

How can I improve indoor air quality?

Indoor air quality is a growing concern, as studies show indoor air can be more polluted than outdoor air. Regular dusting, vacuuming, and installing UV light units, special filters, or electronic air cleaners can improve air quality, which is essential for health.

How do I know if my unit is under warranty?

Check the label on the unit for its manufacture date. If the unit is less than five years old, it may still be covered. Contact the manufacturer for details.

How can I extend the life of my HVAC unit?

To maximize your unit’s lifespan, reduce usage by adjusting the thermostat when you’re away. Regularly changing air filters and scheduling annual check-ups can help prevent issues before they start.

These are just some of the questions HVAC specialists handle every day. When in doubt, consulting a professional is always a wise choice.