Before installing a new AC system, it’s important to consider factors such as the size of your home, existing ductwork, insulation levels, and local climate. Proper sizing is critical—an undersized unit may struggle to cool effectively, while an oversized unit may short cycle and waste energy. Energy efficiency ratings, such as SEER (Seasonal Energy Efficiency Ratio), should also be reviewed to ensure long-term savings. Placement of both indoor and outdoor units affects performance and noise levels. A professional assessment helps determine the right system design for comfort, efficiency, and reliability.

Most residential AC installations can be completed in one day, although more complex projects may take two to three days. The timeline depends on whether ductwork modifications are needed, the type of system being installed, and accessibility of installation areas. Single-unit replacements are usually quicker, while first-time installations or upgrades to high-efficiency systems may require additional work. Professional installation includes removing old equipment, placing new components, running refrigerant and electrical connections, and testing performance to ensure the system is operating correctly.

High-efficiency air conditioners often feature higher SEER ratings, variable-speed compressors, and advanced controls that reduce energy consumption. While they may cost more upfront, they typically provide significant long-term savings through reduced utility bills. These units also operate more quietly and maintain more consistent indoor temperatures. Many models include eco-friendly refrigerants that minimize environmental impact. Over time, the efficiency and comfort benefits often outweigh the initial investment, making high-efficiency systems a popular choice for homeowners seeking performance and savings.

Not always. If your existing ductwork is in good condition, properly sealed, and appropriately sized, it may be reused during AC installation. However, if ducts are leaky, undersized, or poorly insulated, replacing or upgrading them may be necessary to ensure efficiency and even airflow. Old ductwork can waste up to 30% of cooled air through leaks, reducing system performance. A professional inspection determines whether replacement or repairs are needed, helping your new AC operate at peak performance and efficiency.

Choosing the right AC size involves more than square footage—it requires a full load calculation that considers insulation, window placement, ceiling height, and local climate. An undersized system may run constantly without cooling adequately, while an oversized system may cycle too quickly, leading to uneven temperatures and excess humidity. Professional HVAC contractors use industry-standard calculations (Manual J) to determine the correct size. Selecting the right capacity ensures optimal comfort, energy efficiency, and system longevity.

The cost of AC installation varies based on system type, efficiency rating, home size, and whether ductwork modifications are required. Central AC systems generally cost more than window or ductless units, but they provide whole-home comfort. High-efficiency models may have higher upfront costs but save money over time. Additional expenses may include permits, electrical upgrades, or thermostat replacements. The best way to understand cost is to request a professional estimate tailored to your home’s unique needs.

After installation, the technician will test the system to ensure it’s cooling properly, check refrigerant levels, and calibrate the thermostat. You may notice improved comfort and quieter operation compared to your old system. It’s also common for homeowners to see lower energy bills when replacing older, less efficient units. To maintain performance, remember to change air filters regularly, schedule annual maintenance, and keep outdoor units free of debris. Following these steps ensures long-term efficiency and reliability from your new AC system.