How do you know for sure your new furnace or air conditioner is more efficient than your old clunker? Take a look at this infographic on efficiency ratings. Bookmark the page and refer back to it when you start investigating your furnace or air conditioner upgrade.

Learn how efficiency is measured and how to get the best value from your investment, whether you opt for 8 SEER or 23 SEER (we’ll get to that).


Air conditioner energy efficiency ratings

Why Efficiency Matters

Efficiency is more than just a buzzword. It directly impacts your utility bills, your environmental footprint, and the comfort of your living space. Investing in an efficient unit can mean long-term savings and a greener way of living.

How is Efficiency Measured?

Whether you’re looking at furnaces or air conditioners, efficiency is quantified using specific metrics. For air conditioners, the Seasonal Energy Efficiency Ratio (SEER) is the gold standard. The higher the SEER, the more efficient the unit. Furnaces, on the other hand, utilize the Annual Fuel Utilization Efficiency (AFUE) metric, which indicates the percentage of consumed fuel that’s converted into usable heat.

SEER Explained

SEER stands for Seasonal Energy Efficiency Ratio. In simple terms, it measures the cooling output of an air conditioner over a typical cooling season, divided by the energy it consumed in watt-hours. A higher SEER rating indicates better energy efficiency. While an 8 SEER is less efficient, a 23 SEER unit represents the higher end of the efficiency spectrum.

Maximizing Your Investment

Choosing a higher SEER or AFUE rating might mean a higher upfront cost, but the long-term savings on utility bills can be significant. Moreover, energy-efficient units often come with tax incentives or rebates, adding to the financial benefits.


When you’re in the market for a new furnace or air conditioner, understanding efficiency can make all the difference. By choosing wisely and leveraging the expertise of teams like Dows ClimateCare, you can ensure you get the best value and comfort from your investment.

Ready to upgrade your heating and cooling system with confidence? Contact Dows ClimateCare for expert advice and top-tier solutions.

Sign up to receive helpful home comfort tips and reminders
  • This field is for validation purposes and should be left unchanged.
climatecare logo
better business bureau logo
carrier logo
energystar logo
hrai logo
tssa logo
wsib logo