Your HVAC system plays a big role in your home’s comfort—and your energy bills. An energy-efficient system doesn’t just save you money; it also reduces wear and tear, lowers your carbon footprint, and helps your home run more smoothly. But how do you know if your HVAC unit is energy efficient? Here are four ways to tell:

1. Check the SEER or AFUE rating

• One of the most straightforward ways to measure HVAC efficiency is by looking at the SEER or AFUE rating.
• SEER (Seasonal Energy Efficiency Ratio) measures cooling efficiency. A SEER rating of 14 or higher is generally considered efficient today.
• AFUE (Annual Fuel Utilization Efficiency) applies to furnaces. An AFUE rating of 90% or more means the system converts 90% of fuel into heat, wasting very little.

These ratings can usually be found on the yellow “Energy Guide” label on the unit or in your owner’s manual. If your system is older and has a low SEER or AFUE rating, it might be costing you more to operate than necessary.

2. Compare your utility bills over time

If your energy bills have increased over the past few years and your usage habits haven’t changed, your HVAC system might be losing efficiency.

Older or poorly maintained systems have to work harder to deliver the same level of comfort. This increased workload means higher energy consumption—and higher bills. Also look for signs like hot and cold spots around the home, which can point to inefficiencies in heating or cooling distribution.

3. Evaluate the system’s performance and maintenance

How well your system performs can give clues about its efficiency. Signs of poor performance include:

• Long run times
• Frequent cycling on and off
• Inconsistent temperatures
• Unusual noises

Even the most efficient units need regular maintenance. If filters are clogged or components are dirty or worn out, your system will use more energy. If it’s been over a year since your last professional tune-up, a simple service visit could boost performance and efficiency.

4. Consider the age of your system

The age of your HVAC unit has a big impact on its efficiency. Most systems last 10 to 15 years. After that, even well-maintained units tend to become less efficient and more prone to breakdowns.

Technology has come a long way in recent years. Newer systems are designed to use less energy and often include features like variable-speed motors and smart thermostat compatibility. If your system is over a decade old, you might save more in the long run by upgrading to a high-efficiency system.

Final thoughts

If you’re unsure how your HVAC system is performing, schedule an inspection with a qualified technician like those at Knight’s Mechanical. They can check efficiency ratings, test components, and make recommendations to help you save energy and money. An energy-efficient HVAC unit isn’t just about comfort—it’s an investment in your home’s future.