Chapin, S.C. – September 18, 2026 -- A high summer energy bill rarely comes from one single problem, according to HVAC experts Rick Liberti and Jon McCartha of Mid-State Heating and Air LLC in Chapin, South Carolina. Their insights, featured in a new HelloNation article, break down the everyday household issues that push cooling costs higher during peak heat.
Dirty filters force HVAC systems to work overtime
Dirty filters restrict airflow, making the system use more energy just to circulate air through the home. Beyond raising costs, this strain also reduces overall indoor comfort.
Poor insulation lets cooled air escape through walls and gaps
When cool air leaks out through attics, walls, or gaps around doors and windows, the HVAC unit has to work harder to replace it. Even a properly functioning system can struggle to keep temperatures steady in a poorly insulated home.
Aging systems quietly lose efficiency over time
An older unit may still run, but it often consumes more electricity than it should, especially if routine AC maintenance has been delayed. That extra consumption adds directly to a household's summer bill.
Cranking the thermostat down doesn't cool a home faster
Liberti and McCartha note that sharply lowering the thermostat doesn't speed up cooling — it just makes the system run longer. That extended run time drives up cooling costs unnecessarily during the hottest stretches of summer.
Regular AC maintenance catches problems before they escalate
Routine servicing helps identify dirty filters, low refrigerant, and worn components before they turn into bigger, costlier issues. According to the experts, consistent maintenance supports better performance and helps keep cooling costs in check over time.
Uneven cooling and rising humidity can signal deeper problems
Warning signs like inconsistent room temperatures, higher indoor humidity, and longer system run times often point to a mix of dirty filters, poor insulation, and aging equipment working against each other.
The article recommends homeowners take a proactive approach: keep filters clean, seal air leaks, improve insulation, and schedule regular AC maintenance. These steps won't eliminate cooling costs entirely, but they can make a high summer energy bill more predictable and manageable.