Unusually high energy bills? Your HVAC system may be the cause. Learn the common reasons and solutions.
If your energy bills have spiked without a change in usage, your HVAC system is the most likely culprit. Heating and cooling account for 40–60% of home energy use.
HVAC systems lose efficiency over time. A 15-year-old system may use 30–50% more energy than a new one.
Dirty components force the system to work harder, using more energy.
Leaky ductwork can waste 20–30% of conditioned air before it reaches living spaces.
Low refrigerant makes the system run longer to achieve the same cooling.
Inadequate insulation forces the HVAC to work harder to maintain temperature.
| Repair | Cost Range |
|---|---|
| Filter replacement + tune-up | $100 – $300 |
| Duct sealing | $300 – $1,500 |
| Refrigerant recharge | $300 – $1,500 |
| Insulation upgrade | $1,000 – $5,000 |
| System replacement | $7,500 – $17,000 |
If your system is over 15 years old and energy bills keep climbing, a new high-efficiency system can pay for itself in energy savings within 5–7 years.
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