Every July it's the same story: the temperature climbs, the AC runs nonstop, and the electric bill doubles. Heating and cooling account for roughly half of the energy used in a typical U.S. home, per ENERGY STAR — so summer is where small inefficiencies become big money.
Where your cooling dollars leak out
- A dirty filter makes the system work harder for less cooling — replace it every 1–3 months in summer.
- Leaky ducts can lose a large share of cooled air into attics and crawlspaces.
- An aging or oversized unit short-cycles, wearing out faster and cooling unevenly.
- Poor insulation and air sealing let the heat you're paying to remove pour right back in.
No-regret fixes any homeowner can do
Start with a programmable or smart thermostat, seal obvious gaps around windows and doors, and keep the outdoor condenser clear of debris. The U.S. Department of Energy's Energy Saver guide has room-by-room steps that pay back quickly.
When a tune-up beats a replacement
An annual professional tune-up — cleaning coils, checking refrigerant charge, and testing airflow — often restores lost efficiency for a fraction of a new system's cost. If your unit is 12–15+ years old and needs frequent repairs, replacement with a high-efficiency model usually wins on lifetime cost.
Bring in a pro
Compare licensed HVAC companies for a tune-up or system quote, or see the best-rated HVAC pros near you. Since cooling loads ride on your building envelope, it's worth reading about insulating siding and having an electrician confirm your panel can handle a modern system.