According to the US Department of Energy, the typical family spends nearly $2,000 per year on home energy bills. Much of that money, however, is wasted through leaky windows or ducts, old appliances or inefficient heating and cooling systems. That’s why all new Samsung® and Bosch® HVAC solutions are made with energy efficiency in mind.

If you’re in the market for a new HVAC system, knowing a few key terms will help you find the right one for your home. SEER HVAC ratings indicate energy efficiency in some systems, while AFUE heating efficiency is used as a tool of measure in others, and BTU HVAC units speak in terms of how much air temperature is changed in an hour. Read on for an in-depth look:

BTU: The British Thermal Unit is the international measurement of energy—it’s the amount of heat needed to raise one pound of water by one degree Fahrenheit. For HVAC units, it measures the quantity of a unit can warm in a room in one hour.

SEER: Stands for Seasonal Energy Efficiency Ratio. The higher the SEER, the greater the energy efficiency. Higher SEER ratings will lead to lower electrical costs. In general, ductless systems typically use up to 40% less energy that conventional systems and window units.

AFUE: Gas furnaces use something called Annual Fuel Utilization Efficiency as their measurement of heating efficiency. The higher the AFUE, the greater the efficiency and energy savings potential.