Practical ways to reduce residential heating and cooling costs by addressing thermostat use, building load, airflow, maintenance and equipment operation.
The largest savings opportunities are not always equipment upgrades. Start by identifying what makes the system run and whether the home is losing conditioned air or gaining unwanted heat.
Thermostat strategy, air sealing, insulation, duct condition and basic maintenance can affect runtime without requiring complete system replacement.
When equipment is near the end of its life, efficiency becomes one factor in a broader replacement decision.
Avoid unnecessary heating or cooling when the home does not require the same comfort setpoint.
Air leakage, insulation and windows influence the load the HVAC system must satisfy.
Lost supply air and return leakage can waste conditioned air and increase runtime.
Dirty filters and restrictions can reduce system performance.
A malfunctioning or poorly maintained system may consume more energy while delivering less comfort.
Higher-efficiency replacement can reduce consumption, but savings must be compared with added installed cost.
Equipment efficiency describes how effectively equipment performs under defined conditions. Your utility consumption also depends on weather, thermostat settings, building heat gain or loss, ductwork, system sizing, maintenance and how many hours the equipment operates.
Before replacing functioning equipment solely for a higher efficiency rating, evaluate low-cost problems such as thermostat schedules, dirty filters, blocked airflow, duct leakage and building-envelope deficiencies. Major equipment replacement should be evaluated on installed cost, expected savings, comfort and remaining equipment life.
Evaluate efficiency as an investment, not just a rating.
Keep equipment and airflow operating as intended.
Understand how air distribution affects performance.
Use Central HVAC's planning and evaluation tools.
Use the Buying Guides and Homeowner Tools to evaluate equipment efficiency, system age, replacement budget and contractor proposals together.
Put equipment efficiency ratings into financial context.
See how distribution losses can undermine efficient equipment.
Understand SEER2, EER2, HSPF2 and AFUE before comparing systems.
Apply efficiency information to replacement decisions.