We compare modern HVAC and AC units using efficiency ratio systems - just like cars. A Seasonal Energy Efficiency Ratio (SEER) is the most commonly used standard for rating AC units.

While it might seem unimportant, the air filter is one of the most critical working parts in an efficient HVAC system.

If a furnace's normal operation has led to many blown fuses, homeowners need to act fast and address the cause as soon as possible.